阅读说明：本技术 一种土壤调理剂及制备方法 (Soil conditioner and preparation method thereof ) 是由 张岩 李孝梅 朱湖地 李鑫林 魏丽 于 2020-07-07 设计创作，主要内容包括：本发明公开了一种土壤调理剂及制备方法,包括：池塘底泥,白云石粉、草木灰、粉煤灰和细沙中的一种或多种。本发明将池塘底泥作为土壤调理剂的主要原料,其一方面解决农田土壤中重金属污染问题,增加土壤肥力；另一方面解决池塘底泥的去向问题,减少环境危害；达到废物合理利用的目的,同时能产生一定价值,为土壤修复提供一种新的研究方向。(The invention discloses a soil conditioner and a preparation method thereof, wherein the soil conditioner comprises the following steps: pond bottom mud, one or more of dolomite powder, plant ash, fly ash and fine sand. According to the invention, the pond sediment is used as a main raw material of the soil conditioner, so that the problem of heavy metal pollution in farmland soil is solved, and the soil fertility is increased; on the other hand, the problem of the destination of the pond bottom mud is solved, and the environmental hazard is reduced; the purpose of reasonable utilization of waste is achieved, a certain value can be generated, and a new research direction is provided for soil remediation.)

1. A soil conditioner, comprising:

pond bottom mud;

one or more of dolomite powder, plant ash, fly ash and fine sand.

2. The soil conditioner of claim 1, comprising:

pond bottom mud, dolomite powder, plant ash, fly ash and fine sand.

3. The soil conditioner of claim 2, comprising, in parts by weight:

30-50 parts of pond bottom mud;

10-20 parts of dolomite powder;

5-15 parts of plant ash;

5-15 parts of fly ash;

20-30 parts of fine sand.

4. The soil conditioner of any one of claims 1 to 3, wherein the pond sludge comprises one or more of fish pond sludge, shrimp pond sludge, crab pond sludge, and frog pond sludge.

5. The soil conditioner according to any one of claims 1 to 3, wherein the pond bottom sludge is selected from soil dried at the pond edge, and is aired and crushed into sludge powder with the particle size of less than 0.4 mm.

6. The soil conditioner according to any one of claims 1 to 3, wherein calcium carbonate in the dolomite powder accounts for 54-58% of the total weight of the dolomite powder, magnesium carbonate in the dolomite powder accounts for 40-45% of the total weight of the dolomite powder, and the grain size of the dolomite powder is less than 0.4 mm.

7. The soil conditioner of any one of claims 1 to 3, wherein the plant ash comprises one or more of plant ash, wood ash, cottonseed hull ash, and rice ash.

8. The soil conditioner of any one of claims 1 to 3, wherein the fly ash comprises one or more of class I fly ash, class II fly ash, and class III fly ash.

9. The soil conditioner according to any one of claims 1 to 3, wherein the fine sand has a fineness modulus of 2.2 to 1.6, particles having a particle size of more than 0.075mm are more than 85% by weight, and an average particle size of 0.25mm to 0.125 mm.

10. A method of preparing a soil conditioner according to any one of claims 1 to 3, comprising:

digging pond edge sediment;

spreading and airing the pond edge bottom mud;

crushing the dried bottom mud to the particle size of less than 0.4 mm;

adding an insecticide into the crushed bottom mud for killing insects;

obtaining available pond bottom mud powder after the killing of the insects is finished;

and stirring and mixing the pond bottom mud and one or more of dolomite powder, plant ash, fly ash and fine sand to obtain the soil conditioner.

Technical Field

The invention belongs to the technical field of soil conditioning, relates to a soil conditioner and a preparation method thereof, and particularly relates to a soil conditioner taking pond sediment as a main material and a preparation method thereof.

Background

The soil improvement refers to a series of technical measures for removing or preventing adverse factors influencing crop growth and causing soil degradation, improving soil properties, improving soil fertility and creating good soil environmental conditions for crops by applying theories and technologies of multiple subjects such as soil science, biology, ecology and the like.

The existing soil improvement or conditioning agent comprises the following natural minerals, solid wastes, artificially extracted or synthesized high molecular polymers and biological agents. The soil conditioner is used for improving the phenomena of poor soil tilth, salt and alkali, acidification, toxic substance pollution, nutrient imbalance and the like. Most of the existing soil conditioners contain no nutrients, and a few of the existing soil conditioners contain a few nutrients, but the existing soil conditioners can not be directly used as fertilizers, and nitrogen, phosphorus, potassium fertilizers and trace elements are required to be added when the soil conditioners are used.

The sludge in the pond is solid sediment produced in the fish reproduction process and the remains of aquatic plants, and the sludge has the main characteristics of high water content, high organic matter content and easy decomposition and stink generation, can form a thick anaerobic zone at the bottom of the pond, breed a large amount of bacteria and parasites to cause the disease attack of aquaculture animals, and can restore the healthy fish culture environment only by removing the sludge. However, most of the existing pond sludge treatment methods are sanitary landfill, overstocked incineration, land utilization and the like; the disposal method not only consumes a large amount of manpower and material resources, but also can cause secondary pollution.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a soil conditioner and a preparation method thereof.

The invention discloses a soil conditioner, which comprises:

pond bottom mud;

one or more of dolomite powder, plant ash, fly ash and fine sand.

As a further improvement of the invention, the method comprises the following steps:

pond bottom mud, dolomite powder, plant ash, fly ash and fine sand.

As a further improvement of the invention, the paint comprises the following components in parts by weight:

30-50 parts of pond bottom mud;

10-20 parts of dolomite powder;

5-15 parts of plant ash;

5-15 parts of fly ash;

20-30 parts of fine sand.

As a further improvement of the invention, the pond sediment comprises one or more of fish pond sediment, shrimp pond sediment, crab pond sediment and frog pond sediment.

As a further improvement of the invention, the bottom sludge of the pond is selected from soil dried by the sides of the pond, and is aired and crushed into sludge powder with the particle size of less than 0.4 mm.

As a further improvement of the invention, the calcium carbonate in the dolomite powder accounts for 54-58% of the total weight of the dolomite powder, the magnesium carbonate in the dolomite powder accounts for 40-45% of the total weight of the dolomite powder, and the particle size of the dolomite powder is less than 0.4 mm.

As a further improvement of the present invention, the plant ash comprises one or more of plant ash, wood ash, cottonseed hull ash and rice ash.

As a further improvement of the invention, the fly ash comprises one or more of class I fly ash, class II fly ash and class III fly ash.

As a further improvement of the invention, the fineness modulus of the fine sand is 2.2-1.6, the total weight of particles with the particle size of more than 0.075mm is more than 85%, and the average particle size is 0.25-0.125 mm.

The invention also discloses a preparation method of the soil conditioner, which comprises the following steps:

digging pond edge sediment;

spreading and airing the pond edge bottom mud;

crushing the dried bottom mud to the particle size of less than 0.4 mm;

adding an insecticide into the crushed bottom mud for killing insects;

obtaining available pond bottom mud powder after the killing of the insects is finished;

and stirring and mixing the pond bottom mud and one or more of dolomite powder, plant ash, fly ash and fine sand to obtain the soil conditioner.

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

according to the invention, the pond bottom mud is used for producing the soil conditioner, so that the cost for treating the pond bottom mud is reduced; meanwhile, the soil conditioner can provide various nutrient components required by crops in a balanced manner, so that the purposes of high quality and high yield are achieved; the method is simple to operate, high in feasibility, free of operations such as high temperature and fermentation, and suitable for large-scale production in engineering.

Drawings

FIG. 1 is a flow chart of a method of preparing a soil conditioner according to one embodiment of the disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention is described in further detail below with reference to the attached drawing figures:

the invention discloses a soil conditioner, which takes pond bottom mud as a main raw material, and achieves safe utilization of the pond bottom mud while increasing crop yield and reducing heavy metal pollution of land; it includes: taking pond bottom mud as a main raw material, and adding one or more of dolomite powder, plant ash, fly ash and fine sand; for example, soil conditioners include: pond bottom mud and dolomite powder; alternatively, the soil conditioner comprises: pond bottom mud, dolomite powder, plant ash and fine sand; alternatively, the soil conditioner comprises: the pond bottom mud, dolomite powder, plant ash and fine sand comprise: pond bottom mud, dolomite powder, plant ash and fly ash; alternatively, the soil conditioner comprises: pond bottom mud, dolomite powder, plant ash, fly ash and fine sand.

Preferably, the soil conditioner of the invention consists of 5 components of pond bottom mud, dolomite powder, plant ash, fly ash and fine sand.

Further preferably, the soil conditioner of the present invention comprises, in parts by weight: 30-50 parts of pond bottom mud; 10-20 parts of dolomite powder; 5-15 parts of plant ash; 5-15 parts of fly ash; 20-30 parts of fine sand.

As an example of the above: the soil conditioner comprises the following components in parts by weight: 30 parts of pond bottom mud; 10 parts of dolomite powder; 5 parts of plant ash; 5 parts of fly ash; 20 parts of fine sand.

As an example of the above: the soil conditioner comprises the following components in parts by weight: 40 parts of pond bottom mud; 15 parts of dolomite powder; 10 parts of plant ash; 10 parts of fly ash; and 25 parts of fine sand.

As an example of the above: the soil conditioner comprises the following components in parts by weight: 50 parts of pond bottom mud; 20 parts of dolomite powder; 15 parts of plant ash; 15 parts of fly ash; and 30 parts of fine sand.

Wherein the content of the first and second substances,

the bottom mud of the pond selected by the invention contains a plurality of rotten plants and nutrient elements precipitated from the water body. It contains N, P, K elements and trace elements. Meanwhile, the pond bottom mud also has good air permeability, so that the pond bottom mud becomes an indispensable substrate for plant fertilizers. The pond bottom mud disclosed by the invention comprises one or more of fish pond bottom mud, shrimp pond bottom mud, crab pond bottom mud and frog pond bottom mud, and the pond bottom mud is prepared from dry mud at the sides of a pond through airing and crushing into mud powder with the particle size of less than 0.4 mm.

The calcium carbonate in the dolomite powder accounts for 54-58% of the total weight of the dolomite powder, the magnesium carbonate in the dolomite powder accounts for 40-45% of the total weight of the dolomite powder, and the particle size of the dolomite powder is less than 0.4 mm.

The plant ash comprises one or more of plant ash, wood ash, cottonseed hull ash and rice ash.

The fly ash comprises one or more of class I fly ash, class II fly ash and class III fly ash.

The fineness modulus of the fine sand is 2.2-1.6, the total weight of particles with the particle size of more than 0.075mm is more than 85%, and the average particle size is 0.25-0.125 mm.

As shown in fig. 1, the present invention also provides a method for preparing a soil conditioner, comprising:

step 1, digging pond edge sediment;

the contents of bottom mud components at different parts of the bottom mud of the fishpond are different, and the bottom mud of the fishpond is most fertile, but has the largest toxicity and a large quantity of insects, so that the bottom mud is not suitable for being used as a soil conditioner raw material; the dried soil around the pond has low toxicity and low insect content, and is an ideal soil conditioner raw material. Therefore, the soil excavated by the method is dry soil around the pond.

Step 2, spreading and airing;

wherein, the dug bottom mud of the fish pond is spread and exposed to the sun for 3 days, and the water in the bottom mud of the fish pond is exposed to the sun, so that the parasite content is reduced.

Step 3, crushing;

wherein, the dried fishpond sediment is put into a crushing device and is ground into powder with the particle size of less than 0.4 mm.

Step 4, killing insects;

adding an insecticide into the fishpond sediment powder to kill parasites and prevent the parasites from poisoning crops; collecting the obtained fishpond sediment powder to be used for preparing a soil conditioner.

Step 5, preparing a soil conditioner;

wherein, the pond bottom mud and one or more of dolomite powder, plant ash, fly ash and fine sand are stirred and mixed to obtain the soil conditioner.

The principle of each component in the soil conditioner is as follows:

1. bottom sludge of the fishpond: provides nutrient substances and various trace elements required by plant growth, such as organic substances, P, N, K, Ca, Mn, Fe, B and the like, and can provide sufficient nutrients for plants.

2. Dolomite powder: the acidity of the soil is improved, the physical properties of the soil are improved, and the pH value of the soil is increased; the method can prevent the loss of magnesium in leaves caused by the imbalance of the proportion of calcium and magnesium, and avoid the poison of aluminum and manganese to crops, thereby improving the supply of other nutrient elements and promoting the development of root systems.

3. Plant ash: promoting seed germination, promoting rooting, inhibiting diseases and pests, and improving drought resistance. The addition of the plant ash can also kill harmful microorganisms in the bottom sludge of the fishpond.

4. Fly ash: the soil volume weight is reduced, the soil void content is increased, the ground temperature is improved, the soil microorganism activity is promoted, the nutrient conversion is facilitated, the heat preservation and the soil moisture preservation are facilitated, the water, the fertilizer, the gas and the heat tend to be coordinated, a good soil environment is created for the growth of crops, and the yield of the crops is increased.

5. Fine sand: the sand-binding proportion of the soil is adjusted, the soil structure is improved, and the soil is used as a fish pond sediment carrier, so that soil hardening caused by excessive fish pond sediment is avoided.

6. The synergistic use of the pond sediment, the fly ash and the fine sand can adjust the sand-binding proportion of soil, improve the soil structure, facilitate the formation of granular structures and improve the water retention capacity of soil; the pond bottom mud and the plant ash are cooperatively used, so that an unbalanced soil nutrient system can be conditioned, nutrient supply is facilitated, the improvement of polluted soil is facilitated, and the passivation effect of heavy metal ions is achieved; the pond bottom mud, dolomite powder and fly ash are used cooperatively, so that the pH value of soil can be adjusted, saline-alkali soil can be improved, and the soil alkalinity saturation and cation exchange capacity can be adjusted.

7. The addition amounts of the pond bottom mud, the dolomite powder, the plant ash, the fly ash and the fine sand designed by the invention can ensure that the soil is not salted and hardened after being applied to the soil, the pH value of the soil is not greatly changed, and the added substances meet the standard of soil pollution risk control standard of soil environment quality agricultural land (GB 15618-2018).

8. The grain sizes of the fishpond sediment, dolomite powder and fine sand are limited because the grain sizes have obvious influence on the effect of the soil conditioner (the influence can reach 30 percent) because the specific surface area of small-grain medicaments is larger, the small-grain medicaments are in more sufficient contact with soil but not too small, the air permeability of the soil is influenced, and the microbial activity is influenced.

The invention has the advantages that:

according to the invention, the pond bottom mud is used for producing the soil conditioner, so that the cost for treating the pond bottom mud is reduced; meanwhile, the soil conditioner can provide various nutrient components required by crops in a balanced manner, so that the purposes of high quality and high yield are achieved; the method is simple to operate, high in feasibility, free of operations such as high temperature and fermentation, and suitable for large-scale production in engineering.

To further verify the effect of the soil conditioner of the present invention, the present invention is further described below with reference to specific embodiments.