阅读说明：本技术 一种基于工程渣土的植生基质及其制备方法和应用 (Vegetation matrix based on engineering residue soil and preparation method and application thereof ) 是由 吕新建 宁超 史常青 赵廷宁 安一喆 翟佳 杜洁雯 吴链煜 于 2020-05-19 设计创作，主要内容包括：本发明提供一种基于工程渣土的植生基质及其制备方法和应用,所述植生基质包括主体材料和辅助材料,所述主体材料包括工程渣土和绿化土,所述辅助材料包括腐殖酸、生物复合菌和保水剂,所述工程渣土占所述主体材料的50～70wt％。本发明提供的植生基质充分利用了建设过程中产生的工程渣土,在同样实现植被良好生长的基础上,有利于减少绿化土的使用量,并实现工程渣土资源化利用,起到了良好的经济、社会和生态效益。(The invention provides a plant growing matrix based on engineering slag soil, and a preparation method and application thereof, wherein the plant growing matrix comprises a main body material and an auxiliary material, the main body material comprises the engineering slag soil and greening soil, the auxiliary material comprises humic acid, biological compound bacteria and a water-retaining agent, and the engineering slag soil accounts for 50-70 wt% of the main body material. The plant growth substrate provided by the invention makes full use of the engineering muck generated in the construction process, is beneficial to reducing the use amount of greening soil and realizing resource utilization of the engineering muck on the basis of realizing good growth of vegetation, and plays a role in good economic, social and ecological benefits.)

1. The plant growth substrate based on the engineering muck is characterized by comprising a main body material and an auxiliary material, wherein the main body material comprises the engineering muck and greening soil, the auxiliary material comprises humic acid, biological compound bacteria and a water-retaining agent, and the engineering muck accounts for 50-70 wt% of the main body material.

2. A vegetation substrate according to claim 1 wherein the engineered soil residue is produced in road construction or ore mining and has a particle size of 5mm or less.

3. A plant growth substrate according to claim 1, wherein the greening soil is soil for garden nursery seedling, and the soil comprises 2-10 g/kg of organic matter, 10-100 mg/kg of hydrolyzable nitrogen, 20-30 mg/kg of available phosphorus and 30-300 mg/kg of quick-acting potassium.

4. A vegetative substrate according to claim 1 wherein the biological complex bacteria comprise nitrogen fixing bacteria, carbon fixing bacteria and silicate bacteria, each in an amount of not less than 0.01 hundred million/g.

5. A vegetative matrix according to claim 1, wherein the water retaining agent is a polyacrylamide.

6. A vegetation substrate according to any one of claims 1 to 5, wherein in said vegetation substrate, the mass ratio of the engineering residue soil to the greening soil is 1:1, the humic acid content is 300g/m³The content of the biological compound bacteria is 50g/m³The content of the water retention agent is 450g/m³。

7. A vegetation substrate according to any one of claims 1 to 5, wherein said vegetation substrate has a weight ratio of engineering residue soil to green soil of 7:3 and a humic acid content of 300g/m³The content of the biological compound bacteria is 100g/m³The content of the water retention agent is 150g/m³。

8. A method of preparing a vegetative substrate according to any one of claims 1 to 7, comprising: and uniformly mixing all components of the plant growth matrix.

9. The use of the plant-growing matrix according to any one of claims 1 to 7 in ecological protection, wherein the plant-growing matrix is used in slope ecological protection of the engineering muck production site.

10. The use of claim 9, wherein the vegetative substrate is used for the cultivation of lespedeza, amorpha fruticosa, poa annua, ryegrass and festuca arundinacea.

Technical Field

The invention relates to the field of ecological environment protection, in particular to a vegetation substrate based on engineering residue soil and a preparation method and application thereof.

Background

The mountain expressway construction or mining destroys natural landscapes, destroys original soil lands and vegetations, aggravates water and soil loss, generates a large amount of engineering muck, and is easy to cause serious disasters such as landslide and debris flow, wherein the ecological environment is affected by random stacking of the engineering muck, including soil pollution, water pollution and the like.

Because the engineering muck has the characteristics of poor physical structure, lack of nutrient components, poor water retention capacity, different particle sizes and the like, the recycling is difficult, and the vegetation recovery and treatment difficulty is higher.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a vegetation matrix based on engineering slag soil and a preparation method and application thereof.

The invention provides a plant growth substrate based on engineering muck, which comprises a main body material and an auxiliary material, wherein the main body material comprises the engineering muck and greening soil, the auxiliary material comprises humic acid, biological compound bacteria and a water-retaining agent, and the engineering muck accounts for 50-70 wt% of the main body material.

Experiments show that after the engineering muck is used for replacing greening soil, a small amount of auxiliary materials are added to obtain the vegetation substrate with a good effect, and the vegetation substrate is suitable for vegetation growth. Therefore, the engineering residual soil can be fully utilized on site, the environmental pressure is relieved, and the cost, including the own cost of the foreign soil and the transportation cost, can be reduced. In addition, the mass percentage of the engineering residue soil is required to be controlled to be 50-70%, if the engineering residue soil content exceeds 70%, the obtained vegetation substrate is not beneficial to vegetation growth no matter how the addition types and the proportion of the auxiliary materials are adjusted; if the content of the engineering residue soil is lower than 50%, the cost reduction effect is not obvious.

Further, the engineering dregs are generated in road construction or ore mining, and the particle size of the engineering dregs is less than or equal to 5 mm.

Furthermore, the greening soil is soil for garden nursery seedling culture, wherein the content of organic matters is 2-10 g/kg, the content of hydrolyzable nitrogen is 10-100 mg/kg, the content of available phosphorus is 20-30 mg/kg, and the content of quick-acting potassium is 30-300 mg/kg.

Further, the biological compound bacteria comprise azotobacter, carbon-fixing bacteria and silicate bacteria, and the number of each bacteria is not less than 0.01 hundred million/g. Preferably, the biological compound bacteria are biological water-closing bacteria in Chinese patent CN 103563588B.

Further, the water retention agent is polyacrylamide, preferably a copolymer of polyacrylate and polyacrylamide.

Furthermore, in the plant growing matrix, the dosage of the auxiliary material is 200-1000 g/m³。

In a preferred embodiment of the invention, in the plant growth substrate, the mass ratio of the engineering slag soil to the greening soil is 1:1, and the content of humic acid is 300g/m³The content of biological compound bacteria is 50g/m³The content of the water retention agent is 450g/m³。

In another preferred embodiment of the invention, in the plant growth substrate, the mass ratio of the engineering slag soil to the greening soil is 7:3, and the content of humic acid is 300g/m³The content of the biological compound bacteria is 100g/m³The content of the water retention agent is 150g/m³。

The invention also provides a preparation method of the plant growing matrix, which comprises the following steps: and uniformly mixing all components of the plant growth matrix.

The invention also provides application of the plant growing matrix in ecological protection, and preferably the plant growing matrix is applied to side slope ecological protection of the engineering muck production land.

Furthermore, the plant growth substrate is used for planting lespedeza, amorpha fruticosa, bluegrass, ryegrass and tall fescue when in application.

The plant growth substrate provided by the invention makes full use of the engineering muck generated in the construction process, is beneficial to reducing the use amount of greening soil and realizing resource utilization of the engineering muck on the basis of realizing good growth of vegetation, and plays a role in good economic, social and ecological benefits.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications. The reagents or instruments used are conventional products available from regular distributors, not indicated by the manufacturer.

In the following examples, the greening soil is collected from lily garden group nursery gardens in Jinan City, wherein the organic matter content is 3.37g/kg, the hydrolyzable nitrogen content is 54.03mg/kg, the available phosphorus content is 25.75mg/kg, and the quick-acting potassium content is 216.87mg/kg, and the greening soil is aired and inactivated during the test (plant seeds in the greening soil are killed at high temperature, the test needs no inactivation in production, and the more plant seeds are;

the engineering muck is collected from the construction of roads in the city of Jinan and sieved by a soil sieve of 5 mm;

the humic acid is provided by the institute of chemical and environmental engineering, university of mineral industry (Beijing), and is black powder, which is mainly obtained by decomposing and converting plant remains by microorganisms;

the biological composite bacteria are provided by Beijing Shennong seal source organic agriculture development Limited, and are black powder, and the preparation method is shown in the preparation method of biological water-retaining bacteria in Chinese invention patent CN 103563588B;

the water-retaining agent is white powder provided by Beijing green source ecological technology limited, and the main component of the water-retaining agent is a copolymer of polyacrylate and polyacrylamide.