阅读说明：本技术 一种吹填区域盐碱地排盐控水增肥的方法及其应用 (Method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic filling area and application thereof ) 是由 刘富海 刘瑞军 刘一翔 朱建锋 王宇翔 于 2021-07-16 设计创作，主要内容包括：本发明涉及盐碱地城市生态建设技术领域,具体公开了一种吹填区域盐碱地排盐控水增肥的方法及其应用,吹填区域盐碱地排盐控水增肥的方法通过在暗管周围设置滤料,在暗管上层铺设滤料作为阻断地下盐分上升的隔离层；隔离层上回填吹填土,且吹填土中掺入滤料,并进行淋洗脱盐；滤料使用的是经过粉碎、干燥加工的绿植废弃物。在排盐后的吹填土中添加经过发酵腐熟的绿植废弃物作为土壤改良剂,步骤简单、投入低、见效快、效果好,实现了吹填区盐碱地直接改良绿化,解决了现有吹填土改良技术中采用暗管排盐技术,存在吹填土不能直接成为园林建设的种植土的问题和以往吹填土改良时间长,改良效果差,投入成本高的问题,本发明具有广阔的市场前景。(The invention relates to the technical field of urban ecological construction of saline-alkali soil, and particularly discloses a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic reclamation area and an application thereof, wherein the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in the hydraulic reclamation area is characterized in that a filter material is arranged around a concealed pipe, and the filter material is laid on the upper layer of the concealed pipe to serve as an isolation layer for blocking the rise of underground salt; backfilling dredger fill on the isolation layer, doping a filter material into the dredger fill, and carrying out leaching desalination; the filter material is green plant waste which is crushed and dried. The method has the advantages that the fermented and decomposed green plant wastes are added into the dredger fill after salt removal to serve as the soil conditioner, the steps are simple, the investment is low, the effect is fast, the effect is good, the saline-alkali soil in the dredger fill area is directly improved and greened, the problem that the dredger fill cannot be directly used as planting soil for garden construction due to the fact that a concealed pipe salt removal technology is adopted in the existing dredger fill improvement technology is solved, the problem that the dredger fill is long in improvement time, poor in improvement effect and high in investment cost in the past is solved, and the method has a wide market prospect.)

1. A method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area is characterized by comprising the following steps:

arranging concealed pipes to carry out salt removal on dredger fill in a dredger fill area by adopting a concealed pipe salt removal process, planting plants on the dredger fill after salt removal, and adding fermented and decomposed green plant wastes into the dredger fill after salt removal to serve as a soil conditioner;

wherein, the periphery of the concealed pipe is provided with a filter material, and the upper layer of the concealed pipe is paved with 15-30cm of the filter material to be used as an isolation layer for blocking the rise of underground salt; backfilling the dredger fill on the isolation layer for more than 1 m, doping an improved matrix into the dredger fill, and performing leaching desalination; the improved substrate is the same as the filter material, and the filter material and the improved substrate use green plant wastes which are crushed and dried.

2. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area as recited in claim 1, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area, the grain size of the filter material is 1-4 cm.

3. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas as claimed in claim 1, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas, the amount of the filter material mixed into the dredger fill is not more than 20% of the volume of the dredger fill.

4. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area as claimed in claim 1, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area, the addition amount of the soil conditioner is 15-20% of the volume of soil body of hydraulic reclamation soil after salt removal.

5. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas as claimed in claim 1, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas, the addition amount of the soil conditioner is applied according to the breast diameter of the plant to be planted, and specifically comprises the following steps: 3-5 kg of soil conditioner is added when the diameter at breast height of the plant is below 10cm, 5-8 kg of soil conditioner is added when the diameter at breast height of the plant is 10-15cm, and more than 8 kg of soil conditioner is added when the diameter at breast height of the plant is more than 15 cm.

6. The method for discharging salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation areas as claimed in claim 1, wherein the grain diameter of the adopted fermented and decomposed green plant waste in the soil conditioner is not more than 1 cm.

7. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas as claimed in claim 1, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in reclamation areas, the thickness of the filter material arranged around the concealed pipe is 15-30 cm.

8. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area as claimed in claim 1, wherein the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation areaWherein the salt content of the soil obtained by adding the soil conditioner is 0.6-1.2g/kg, the pH is 7.80-8.12, and the volume weight is 1.35-1.28mg/cm³。

9. The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area as claimed in claim 8, wherein in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation area, the infiltration rate of the soil obtained after adding the soil conditioner is 5.0-0.36mm/h, and the permeability coefficient is 1 x 10^-4cm/s to 1X 10^-5cm/s。

10. The application of the method for removing salt, controlling water and increasing fertilizer in saline-alkali soil in the hydraulic reclamation area as recited in any one of claims 1 to 9 in the saline-alkali soil treatment.

Technical Field

The invention relates to the technical field of urban ecological construction of saline-alkali soil, in particular to a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area and application thereof.

Background

With the continuous development of society, the land area can also change. Generally, when dredging rivers and lakes, sludge is pumped up and put into a low-lying area, and water loss of the sludge can be used as land, and a formed area is a hydraulic fill area (hydraulic fill area). The dredger fill is formed by hydraulically flushing and filling silt, and is mainly used for dredging or dredging river channels or filling some sections near rivers due to industrial and agricultural production, dredging and dredging the silt in rivers, seas, rivers and lakes by using a dredger, then filling the dredging and filling silt to the bank sides of the water areas or other sections needing to be filled and the silt accumulation areas in a mud form along a conveying and sludge discharging pipeline by using high-pressure water flow, and gradually accumulating, flowing and depositing to form the dredger fill. The land reclamation and reclamation by reclamation and reclamation in the sea at present are effective measures for secondary development and utilization of land resources in coastal areas at home and abroad.

At present, most of dredger fill in dredger fill areas is saline-alkali soil, and can be used as greening planting soil after being improved. At present, the technology of improving the dredger fill into planting soil needs more than 1 year to achieve the landscape effect, the investment cost is higher than the greening cost of soil dressing through the comprehensive improvement of a system, the technology of (shallow diving) concealed pipe salt elimination is particularly adopted to improve the dredger fill, only halophytes or shrubs can be planted in saline and alkali tolerant plants in the first year, and landscape trees cannot be planted. Therefore, the existing concealed pipe salt discharge technology has the problems when used for improving the dredger fill, the dredger fill improved in the first year is small in soil porosity, high in salt content and poor in structure, and cannot become planting soil for garden construction. In summary, a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area needs to be designed so as to achieve the purpose of directly performing green land construction after hydraulic fill in the current year is completed.

Disclosure of Invention

The embodiment of the invention aims to provide a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area, and aims to solve the problem that the obtained improved hydraulic fill soil cannot be directly used as planting soil for garden construction in the prior art which is provided by the background art and adopts a concealed conduit salt removal technology to improve the hydraulic fill soil.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area comprises the following steps:

1) arranging concealed pipes (salt discharge pipes) by adopting a concealed pipe salt discharge process to discharge salt from dredger fill (particularly dredger fill belonging to saline-alkali soil) in a dredger fill area; wherein, if the blind pipe is adopted, the blind pipe needs to be wrapped by non-woven fabrics, the periphery of the blind pipe is provided with filter materials, and the filter materials are paved on the upper layer of the blind pipe for 15-30cm to be used as an isolation layer for blocking the rise of underground salt; backfilling the dredger fill on the isolation layer for more than 1 m, doping the improved substrate in the dredger fill and using the filter material, and leaching and desalting; the filter material is made from green plant wastes which are crushed and dried. The filter material replaces the prior industrial wastes such as stone nitrate, furnace slag and the like as filter materials;

2) planting plants on the dredger fill after salt removal, and adding fermented and decomposed green plant wastes into the dredger fill after salt removal to serve as soil conditioners.

As a further scheme of the invention: in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in the hydraulic fill area, the performance of the soil obtained by adding the soil conditioner into the hydraulic fill soil after salt removal meets the greening planting soil industry standard (CJ/T340-2016 greening planting soil). Namely, in the soil obtained by adding the soil conditioner into the dredger fill after salt removal, the salt content is as follows: 0.6-1.2g/kg, pH: 7.80-8.12, soil volume weight: 1.35-1.28mg/cm³And soil infiltration rate: 5.0-0.36mm/h, soil permeability coefficient: 1X 10^-4cm/s-1×10^-5cm/s, soil organic matter: 20-58g/kg, hydrolyzable nitrogen: 150-180mg/kg, available phosphorus: 43-56mg/kg, quick-acting potassium: 182-289 mg/kg.

The embodiment of the invention also aims to provide application of the method for removing salt, controlling water and increasing fertilizer in saline-alkali soil in the hydraulic reclamation area in saline-alkali soil treatment.

Compared with the prior art, the invention has the beneficial effects that:

the embodiment of the invention provides a method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area, which comprises the steps of firstly adopting a concealed pipe to remove salt from hydraulic fill soil in the hydraulic fill area by adopting a concealed pipe salt removal process, arranging filter materials around the concealed pipe, doping soil improvement matrixes (same as the filter materials) into the hydraulic fill soil, leaching and desalting, wherein the filter materials use green plant wastes which are crushed and dried, then planting plants on the dredger fill subjected to salt removal, and simultaneously adding fermented and decomposed green plant wastes as a soil conditioner into the dredger fill subjected to salt removal, the method has the advantages of simple steps, low investment, quick response and good effect, and green land wastes are utilized, so that the saline-alkali soil in the dredger fill area is directly improved and greened, and the problem that the dredger fill cannot be directly used as planting soil for garden construction due to the fact that a method for improving the dredger fill by adopting a concealed pipe salt removal technology in the prior art is solved; moreover, the green plant waste is used for replacing saltpeter, modifying agent and fertilizer, so that the aim of solving the problems of salt removal, water control and fertilizer increase of saline-alkali soil greening in the hydraulic fill area by using green land waste is fulfilled, and the project has wide market prospect.

Detailed Description

The present invention will be described in further detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

Various modifications to the precise description of the invention will be readily apparent to those skilled in the art from the information contained herein without departing from the spirit and scope of the appended claims. It is to be understood that the scope of the invention is not limited to the procedures, properties, or components defined, as these embodiments, as well as others described, are intended to be merely illustrative of particular aspects of the invention. Indeed, various modifications of the embodiments of the invention which are obvious to those skilled in the art or related fields are intended to be covered by the scope of the appended claims.

The embodiment of the invention provides a method for saline-alkali soil salt discharge, water control and fertilizer increase in a hydraulic reclamation area, in particular to a method for ecological saline-alkali soil salt discharge, water control and fertilizer increase in a coastal hydraulic reclamation area, which comprises the following steps:

arranging concealed pipes (salt discharge pipes) by adopting a concealed pipe salt discharge process (the prior art) to discharge salt from dredger fill (particularly dredger fill belonging to saline-alkali soil) in a dredger fill area; wherein, if the blind pipe is a blind pipe, the blind pipe needs to be wrapped by non-woven fabrics, filter materials are arranged around the blind pipe, and the filter materials are paved on the upper layer of the blind pipe for 15-30cm to serve as an isolation layer for blocking the rise of underground salt; backfilling the dredger fill on the isolation layer for more than 1 m, doping the improved substrate in the dredger fill and using the filter material, and leaching and desalting; the filter material is made from green plant wastes which are crushed and dried. The filter material of the isolation layer and the soil improvement matrix are green plant wastes which are crushed and dried and replace the prior industrial wastes such as rock salt, furnace slag and the like as filter materials;

planting plants on the dredger fill after salt removal, and adding fermented and decomposed green plant wastes into the dredger fill after salt removal to serve as soil conditioners.

In the embodiment of the invention, the filter material of the isolation layer is green plant waste which is crushed and dried, so that the problems that most of the isolation layers in the existing salt removing system for coastal low-lying saline-alkali land are made of consumable industrial materials such as rock nitrate and furnace slag, water and fertilizer are lost in the later improvement period, salt can only be discharged through a hidden pipe, the improvement of soil performance of deep saline-alkali land is not facilitated, and plant roots are difficult to extend downwards are solved.

As another preferred embodiment of the invention, in the method for removing salt, controlling water and increasing fertilizer in saline-alkali soil in the hydraulic reclamation area, the particle size of the filter material of the isolation layer is 1-4 cm.

As another preferred embodiment of the invention, the filter material of the isolating layer has a particle size of 2-3cm, and specifically, the green plant waste subjected to crushing and drying processing is used, that is, the hard green plant waste particles with a particle size of 2-3cm are specifically used.

As another preferred embodiment of the invention, the modified matrix mixed in the dredger fill is applied to the dredger fill by a volume which is not more than 20% of the volume of the dredger fill, the permeability of the soil is increased by uniformly mixing the modified matrix with the dredger fill, and then leaching and desalting are carried out. Specifically, the dredged soil (particularly saline soil) backfilled on the filter material of the isolation layer is doped with dry and hard green plant waste particles with the particle size of 2-3cm, the doping amount is less than or equal to 20% of the volume of the soil body, the green plant waste particles are uniformly mixed with the soil, the soil permeability is increased, leaching desalination is carried out, and the fermented and thoroughly decomposed green plant waste is applied as a soil conditioner during greening planting.

In the embodiment of the invention, the fermented and decomposed green plant wastes are applied as the soil conditioner when the plants are planted, and the green plant wastes are applied according to the demand of the plants, so that the soil fertility is increased, and the effect of integrating salt discharge, water control and fertilizer increase of coastal saline-alkali soil is achieved.

As another preferable embodiment of the invention, the addition amount of the soil conditioner is determined according to the plant to be planted, and is generally 15-20% of the soil volume of the dredger fill after salt removal.

As another preferred embodiment of the present invention, the soil conditioner may be added to the plant pit for planting in a manner determined according to the size and type of the plant to be planted, and generally, 3 to 5 kg is added when the diameter at breast height of the plant is 10cm or less, 5 to 8 kg is added when the diameter at breast height of the plant is 10 to 15cm or more, 8 kg or more is added when the diameter at breast height of the plant is 15cm or more, and so on.

As another preferred embodiment of the invention, the grain diameter of the green plant waste subjected to fermentation and decomposition adopted by the soil conditioner is not more than 1cm, and the green plant waste is uniformly mixed with backfilled dredger fill for use.

As another preferred embodiment of the present invention, the green plant wastes are mainly wastes of trees, grass, flowers, branches, grass, leaves, flowers, etc. in scenic spots, flower markets, parks, nurseries, greenbelts on both sides of roads, which naturally wither or generate plant residues in the process of maintenance.

Preferably, the filter material of the isolation layer is obtained by crushing hard and dry green plant wastes, generally dried branches or dead trees, and can also be obtained by drying the pruned branches in the air and then crushing the dried branches.

As another preferred embodiment of the invention, the thickness of the isolating layer filter material arranged outside the concealed conduit is 15-30 cm.

According to the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in the hydraulic reclamation area, which is provided by the embodiment of the invention, the green plant waste is used for replacing saltpeter, modifying agent and fertilizer, so that the aim of solving the problem of salt removal, water control and fertilizer increase of greening of saline-alkali soil in the hydraulic reclamation area by using green land waste is achieved, and a continuous ecological green land construction mode with low saved investment and recycled waste is embodied.

As another preferred embodiment of the invention, in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in the hydraulic reclamation area, the performance of the soil obtained by adding the soil conditioner into the hydraulic reclamation soil after salt removal meets the greening planting soil industry standard (CJ/T340-2016). The soil obtained by adding soil conditioner into the dredger fill after salt removal has salt content of 0.6-1.2g/kg, pH of 7.80-8.12, and soil volume weight of 1.35-1.28mg/cm³。

In another preferred embodiment of the present invention, in the soil obtained by adding the soil conditioner to the dredger fill after salt removal, the soil infiltration rate is: 5.0-0.36mm/h, soil permeability coefficient: 1X 10^-4cm/s-1×10^-5cm/s。

In another preferred embodiment of the present invention, the soil after adding the soil conditioner to the dredged soil after removing salt has an organic matter: 20-58g/kg, hydrolyzable nitrogen: 150-180mg/kg, available phosphorus: 43-56mg/kg, quick-acting potassium: 182-289 mg/kg.

As another preferred embodiment of the invention, in the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in the hydraulic reclamation area, the method comprises the steps of adopting a concealed conduit salt removal process, and arranging salt removal conduits according to the concealed conduit salt removal process parameters in the prior art; the filter material of the isolation layer is filled around the concealed pipe and on the concealed pipe, and is green plant waste with the grain size of 2-3cm, and then the dredger fill is backfilled.

The embodiment of the invention also provides application of the saline-alkali soil salt discharge, water control and fertilizer increase method in saline-alkali soil treatment in the hydraulic reclamation area.

As another preferred embodiment of the present invention, the saline-alkali soil may be saline-alkali soil in a hydraulic fill area, or may also be other mild saline-alkali soil, moderate saline-alkali soil, severe saline-alkali soil, and the like, and is specifically selected according to requirements, and is not limited herein. Wherein, the slight saline-alkali soil means that the emergence rate is 70-80%, and the salt content is below three per thousand; the severe saline-alkali soil has salt content over six thousandths and emergence rate lower than 50%.

The technical effects of the method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation areas are further described by specific embodiments.

Example 1

A method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in a hydraulic fill area, in particular to a method for improving and greening saline-alkali soil in the hydraulic fill area by using green plant wastes to replace rock salt or furnace slag, increasing soil permeability, reducing water and fertilizer loss in soil and controlling water and fertility, which integrates water and fertility increase, and mainly comprises the following steps:

1) according to a shallow diving hidden pipe salt discharge mode, a ditch with the depth of 15cm and the width of 30cm is planed at a position 1 m away from the ground, a salt discharge pipe is laid in the ditch, if a blind pipe is adopted as the salt discharge pipe, the salt discharge pipe needs to be wrapped by non-woven fabrics, and green plant wastes with the grain diameter of phi 2-3cm are filled around the salt discharge pipe;

2) laying filter materials as an isolation layer on the salt discharge pipe, and laying 15-30cm thick granular green plant wastes with the grain size of phi 2-3 cm;

3) backfilling dredger fill on the filter material of the isolation layer, and adding granular green plant wastes with the grain size of phi 2-3cm into the dredger fill, wherein the addition is not more than 20% of the volume of the soil body, and performing leaching desalination with large water to reach the salt content required by plant planting;

4) and (3) planting landscaping plants, wherein saline soil improvement in the hydraulic fill area is realized by adding fermented and decomposed green plant wastes as soil conditioners, wherein the grain size of the fermented and decomposed green plant wastes is less than or equal to 1cm, and the fermented and decomposed green plant wastes are uniformly mixed with backfilled hydraulic fill soil for use.

In this embodiment, in the later maintenance, the filter material of the isolation layer, which is granular green plant waste, is buried in the underground soil body, basically meets the requirements of salt isolation and control, and is not easily decomposed in an anaerobic state, so that on one hand, the filter material is as large as rock nitrate, and has an isolation effect due to large granules and hardness, so as to prevent the salt in the underground water from rising, and on the other hand, even if part of the salt water rises, the filter material is absorbed by the green plant waste, which is actually wood, and has a salt isolation effect due to hygroscopicity and water absorption; if there is the salinity in the soil body above the isolation layer, along with big water waters the isolation layer filter material, the salinity is also absorbed and absorbed by green discarded object, does not receive how much influence of moisture, and it is bigger than the salt effect in separation soil such as rock salt, and the rock salt can only let the salinity along with big water drip washing, and the salinity is discharged along with the hidden pipe, but if there is not enough water, form gravity water, the salinity just can not discharge in the salt discharge pipe.

Example 2

Compared with the embodiment 1, the method also comprises the step that the adding amount of the soil conditioner is determined according to the planted plants, generally 15-20% of the volume of the soil body, or the soil conditioner can be added into the tree pits, determined according to the size of the tree and the tree species, generally 3-5 kg of the soil conditioner with the diameter at breast height below 10cm is added, 5-8 kg of the soil conditioner with the diameter at breast height of 10-15cm is added, and the like.

Example 3

Granular green plant wastes doped in backfill soil mainly play a role in increasing soil body permeability within five years, the green plant wastes are slowly fermented and decomposed to become organic substrates along with the activity of soil microorganisms in later period, soil fertility is increased, aggregates are increased, the soil structure is also improved, the water retention capacity of soil is improved, after performance is improved, rainwater is greatly increased to be used, the green plant wastes become individual water storage reservoirs, the growth of plant root systems is promoted, the vigorous growth state of plants is kept, and fresh water irrigation is saved.

Example 4

In this embodiment, in the greening of the home district where the caoxine county of the industrial park inhabited in the japanese cardinal, the method in embodiment 1 is adopted to perform salt removal, water control and fertilizer increase, and meanwhile, the salt removal process in the conventional hidden pipe salt removal method is used as a comparison, and the specific tests are as follows: the area is 2000 square meters, the laying of the concealed pipes is the same, corrugated blind pipes are adopted, the pipe diameter of a primary pipe is 63mm, the pipe diameter of a diode is 110-200mm, the pipe interval is 8-10m, and salt discharge pipes are laid according to the concealed pipe salt discharge process in the saline-alkali soil. The difference is that the traditional process adopts niter as the isolating layer; the new process provided in example 1 directly utilized the previous dredger fill, wherein 2-3cm green plant waste crushed into granules was used around the isolation layer and the blind pipe; in the reclamation of the dredger fill, 20% of garden waste with the same grain size (2-3cm) is added, the large-water leaching is carried out, the leaching speed is accelerated, the salt rejection rate reaches 83.6%, the salt content of the soil is reduced from 3.2% to 0.38%, the soil can be planted, the salt content after the planting reaches 0.6-1.2 (the value of 10 sampling points), and the dredger fill saline soil after the salt discharge, water control and fertilizer increase is carried out by adopting the method of the embodiment 1 reaches the industrial planting soil standard through reclamation. The performance of the soil adopting the traditional concealed pipe salt removing mode is not suitable for directly planting plants, and the specific main detection indexes of the soil performance are shown in table 1.

TABLE 1 Main test indexes for soil Properties

Example 5

Compared with the embodiment 1, the garden greening plants are planted trees, 6 kilograms of fermented and decomposed green plant wastes are added into the pits of the planted trees to serve as soil conditioners, and the organic matter content of the green plant wastes reaches 62.6 percent.

Example 6

Compared with the embodiment 1, the garden greening plants are shrubs, and 4 kg of fermented and decomposed green plant wastes are added into tree holes of the shrubs as soil conditioners.

Example 7

Compared with the embodiment 1, the planted landscaping plants are planted on ground cover lawns, the fermented and decomposed green plant wastes are mixed into the surface soil of 0-20cm, the mixing amount of the fermented and decomposed green plant wastes is 15% of the surface soil volume, and the soil performance reaches the national industrial planting soil standard.

Example 8

The same as example 5 except that the planted landscaping plant was white wax was planted, as compared with example 5.

Example 9

The same as example 5 except that the landscaping plant was a planted Sophora japonica was used as compared with example 5.

Example 10

The same as example 5 except that the planted landscaping plant is planted ulmus pumila as compared with example 5.

Example 11

The same as example 5 except that the planted landscaping plant was a planted mallotus japonicus as compared with example 5.

Example 12

The same as example 5 except that the planted landscaping plant is planted ginkgo as compared to example 5.

Example 13

The same as example 5 except that the planted landscaping plant is a planted begonia was used as compared with example 5.

Example 14

The same as example 5 except that the planted landscaping plant was planted honeysuckle compared to example 5.

Example 15

The same as example 5 except that the afforested plant is the shrubalthea tree which is planted, as compared with example 5.

Example 16

The same as example 5 except that the planted landscaping plant was a planted buxus sinica lawn as compared with example 5.

According to the above embodiments, through observation in one year, the planted white wax, sophora japonica, ulmus pumila, aleurites fordii, ginkgo biloba, crabapple, honeysuckle, hibiscus, boxwood lawn, and the like are good in vigor, and have no difference compared with the traditional process.

Example 17

The procedure of example 1 was repeated except that the filter material for the separator was a green plant waste having a granular particle size of 1cm and a thickness of 15 cm.

Example 18

The procedure of example 1 was repeated except that the filter material of the separator was green plant waste in the form of granules having a particle size of 2m and a thickness of 30 cm.

Example 19

The procedure of example 1 was repeated except that the filter material of the separator was a green plant waste having a particle size of 3cm and a thickness of 20 cm.

Example 20

The procedure of example 1 was repeated except that the filter material of the separator was green plant waste in the form of granules having a particle size of 4cm and a thickness of 25cm, as compared with example 1.

Example 21

The method is the same as example 1 except that the dredger fill is mixed with granular green plant waste with the particle size of 2cm dry and hard compared with example 1, and the addition amount of the green plant waste is 20% of the volume of the soil body.

Example 22

The same procedure as in example 1 was repeated, except that the hydraulic fill was mixed with granular green plant wastes having a particle size of 3cm and hardness, and the amount of the mixture added was 10% by volume based on the soil mass, as compared with example 1.

Example 23

The same as example 1 was repeated except that the grain size of the green plant waste used for fermentation and decomposition was 1cm, as compared with example 1.

Example 24

The same as example 1 was repeated except that the grain size of the green plant waste used for fermentation and decomposition was 0.1cm, as compared with example 1.

Example 25

The soil conditioner was the same as in example 1 except that the amount of the soil conditioner added was 15% by volume based on the volume of the soil body as compared with example 1.

Example 26

The soil conditioner was the same as in example 1 except that the amount of the soil conditioner added was 20% by volume based on the volume of the soil body as compared with example 1.

Example 27

The same procedure as in example 1 was repeated, except that the soil conditioner was determined according to the size and type of the plant to be planted, and 3 kg was added when the diameter at breast height of the plant was 10cm or less, 5 kg was added when the diameter at breast height of the plant was 10-15cm, and 8 kg or more was added when the diameter at breast height of the plant was 15cm or more.

Example 28

The same procedure as in example 1 was repeated, except that the soil conditioner was determined according to the size and type of the plant to be planted, and that 5 kg was added when the diameter at breast height of the plant was 10cm or less, 8 kg was added when the diameter at breast height of the plant was 10-15cm, and 8 kg or more was added when the diameter at breast height of the plant was 15cm or more.

The method for removing salt, controlling water and increasing fertilizer of saline-alkali soil in hydraulic reclamation areas has the advantages of simple steps, low investment, quick response and good effect, and green land wastes are utilized, so that the saline-alkali soil in hydraulic reclamation areas is directly improved and greened, a green-keeping and saving type green land construction mode is explored, and the method belongs to the technical field of urban ecological construction of landscaping of saline-alkali soil. At present, during land reclamation from sea and land reclamation construction, backfill soil generated near the coast is mostly saline-alkali soil, particularly, land reclamation of the Caofen Dian industrial area in Hebei province is the land reclamation project from sea with the largest single blow fill area in the world at present, and the formed soil body has the characteristics of nonuniformity, weak permeability, high saturation and high salt content, becomes heavy saline soil, is impossible to directly afforest and needs to be improved in all directions according to the characteristics. At present, the technology of improving dredger fill into planting soil mainly adopts a shallow diving hidden pipe salt elimination technology, the landscape effect can be achieved only in more than 1 year, the input cost is higher than the cost of soil dressing greening through system comprehensive improvement, specifically, only halophyte and saline-alkali tolerant plant ground cover plants or shrubs can be planted in the first year, landscape trees cannot be planted, and the following problems exist: (1) the stone nitrate or the furnace slag is used as the filter material of the isolating layer, so the cost is high, and the material is mainly used for buildings along with the social development; (2) the dredger fill has small soil pores, high salt content and poor structure, and cannot become planting soil when used for garden construction; (3) the dredger fill has low curing degree, poor soil performance and poor development and growth of plant root systems, so that few nutrients can be directly utilized, and the growth vigor of plants is weak. Aiming at the problems, the saline-alkali soil salt discharge, water control and fertilizer increase method in the hydraulic reclamation area provided by the invention realizes the integrated technology of salt discharge, water control and fertilizer increase by using green plant wastes through a set of complete technology treatment, realizes the purpose of directly greening after hydraulic reclamation in the current year,

while the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.