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A kind of low organic matter soil improvement method

A technology of organic matter and organic matter content, applied in soil preparation methods, agricultural machinery and implements, agriculture, etc., can solve problems such as costing a lot of money and time, complex improvement measures, etc., to achieve simple operation, improve water and fertilizer retention capacity, and reduce costs Effect

Active Publication Date: 2022-08-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned improvement methods for low organic matter soil usually require more complicated improvement measures and improvement agents, and at the same time require a lot of money and time investment

Method used

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  • A kind of low organic matter soil improvement method
  • A kind of low organic matter soil improvement method
  • A kind of low organic matter soil improvement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Characteristics of low organic matter soil

[0021] The object of improvement in this example is the barren soil with soil organic matter content below 1%, and the typical features are: bulk density 1.0-1.2g / cm 3 , the water content is 3-5%, the pH is 7.5-8.0, and the organic matter content is 0.5-0.75%.

[0022] (2) Characteristics of stable leachate

[0023] The leachate selected in this example is a domestic waste landfill leachate that has been stably stored in a storage tank, and its typical characteristics are: pH: 8.0-8.3; alkalinity: 8000-9000 mgCaCO3 / L; COD Cr : 4000~4200mg / L; BOD 5 : 120~150mg / L, B / C (biochemical oxygen demand: chemical oxygen demand) is 0.03.

[0024] (3) Composition ratio

[0025] In the present invention, the mass ratio of low-organic soil to leachate is required to be 2.5-5.3, that is, the soil moisture content after mixing is 16-28%, and the low-organic soil content is 72-84%. In this example, the mass ratio of low-organic soil t...

Embodiment 2

[0037] (1) Characteristics of low organic matter soil

[0038] The object of improvement in this example is barren soil with soil organic matter content below 1%, and the typical features are: bulk density 1.2-1.5g / cm 3 , the moisture content is 6-8%, the pH is 7.8-8.2, and the organic matter content is 0.7-0.9%.

[0039] (2) Characteristics of stable leachate

[0040] The leachate selected in this example is a domestic waste landfill leachate that has been stably stored in a storage tank, and its typical characteristics are: pH 7.5-8.0; alkalinity 7000-8000 mgCaCO 3 / L;COD Cr 5000~5500mg / L; BOD 5 150~200mg / L; B / C 0.03.

[0041] (3) Composition ratio

[0042] In the present invention, the mass ratio of low-organic soil to leachate is required to be 2.5-5.3, that is, the soil moisture content after mixing is 16-28%, and the low-organic soil content is 72-84%. In this example, the mass ratio of low organic matter soil to leachate is 4:1, and the moisture content of the m...

Embodiment 3

[0053] (1) Characteristics of low organic matter soil

[0054] The object of improvement in this example is barren soil with soil organic matter content below 1%, and the typical features are: bulk density 1.4-1.7g / cm 3 , the moisture content is 8-10%, the pH is 8.2-8.5, and the organic matter content is 0.6-0.8%. .

[0055] (2) Characteristics of stable leachate

[0056] The leachate selected in this example is a domestic waste landfill leachate that has been stably stored in a storage tank, and its typical characteristics are: pH 7.5-7.8; alkalinity 7000-7500mgCaCO 3 / L;COD Cr : 6000~6500mg / L; BOD 5 150~170mg / L; B / C 0.025.

[0057] (3) Composition ratio

[0058] In the present invention, the mass ratio of low-organic soil to leachate is required to be 2.5-5.3, that is, the soil moisture content after mixing is 16-28%, and the low-organic soil content is 72-84%. In this example, the mass ratio of low organic matter soil to leachate is 3:1, and the moisture content of ...

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Abstract

The invention discloses a low organic matter soil improvement method, which belongs to the technical field of soil improvement. The steps of the method are: mixing low-organic soil with organic matter content less than 1% and domestic waste landfill leachate with biochemical oxygen demand: chemical oxygen demand less than 0.1 according to the mass ratio of (2.5-5.3): 1, and mixing The soil is paved and placed under aerobic conditions, and as the water in the mixed soil decreases, the leachate is continuously added to the mixed soil to keep the water content in the mixed soil unchanged until the organic matter content of the organic soil in the mixed soil is greater than Terminate at 3%. The invention stably combines domestic waste landfill leachate and low-organic soil under aerobic conditions, and is easy to operate. The amount of landfill leachate can be treated, and the water and fertilizer retention capacity and nutrient content of low-organic soil can be improved, and the effective improvement of low-organic soil can be achieved.

Description

technical field [0001] The invention specifically relates to a low organic matter soil improvement method, which belongs to the technical field of soil improvement. Background technique [0002] Soil improvement requires the use of pedology, ecology and other multidisciplinary theoretical techniques to improve soil properties, improve soil fertility, and create a good soil environment. Soil improvement mainly includes barren soil improvement, saline-alkali land improvement, acidified soil improvement, and soil structure improvement. Among them, barren soil, that is, low organic matter soil, is widely distributed in the northwest of my country, and has the characteristics of low viscosity, weak ability to retain water and fertilizer, and low nutrient content. The improvement of low organic matter soil is an extremely important part of soil improvement in my country. [0003] Soil organic matter can not only provide nutrients for plant growth, increase the effectiveness of n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/00
CPCA01B79/00
Inventor 何品晶邵立明陈俊岚吕凡章骅彭伟
Owner TONGJI UNIV
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