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Method for improving low-organic-matter soil

A technology of organic matter and organic matter content, applied in soil preparation methods, agricultural machinery and tools, 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 realize resource conservation. The effect of chemical utilization

Active Publication Date: 2020-05-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method for improving low-organic-matter soil
  • Method for improving low-organic-matter soil
  • Method for improving low-organic-matter soil

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 barren soil with a soil organic matter content below 1%, and the typical characteristics are: bulk density 1.0-1.2g / cm 3 , moisture content 3-5%, pH 7.5-8.0, organic matter content 0.5-0.75%.

[0022] (2) Characteristics of stable leachate

[0023] The leachate used in this example is the domestic waste landfill leachate stored stably in the storage tank, the typical characteristics are: pH: 8.0-8.3; alkalinity: 8000-9000mgCaCO3 / 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 the low organic matter soil to the leachate is required to be 2.5-5.3, that is, the water content of the mixed soil is 16-28%, and the content of the low organic matter soil is 72-84%. In this example, the mass ratio of low organic matter soil to l...

Embodiment 2

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

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

[0039] (2) Characteristics of stable leachate

[0040] The leachate used in this example is the domestic waste landfill leachate stored stably in the storage tank, the typical characteristics are: pH 7.5-8.0; alkalinity 7000-8000mgCaCO 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 the low organic matter soil to the leachate is required to be 2.5-5.3, that is, the water content of the mixed soil is 16-28%, and the content of the low organic matter soil is 72-84%. In this embodiment, the mass ratio of low organic matter soil to leachate is 4:1, and the water content of the mixed soil...

Embodiment 3

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

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

[0055] (2) Characteristics of stable leachate

[0056] The leachate used in this example is the domestic waste landfill leachate stored stably in the storage tank, the 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 the low organic matter soil to the leachate is required to be 2.5-5.3, that is, the water content of the mixed soil is 16-28%, and the content of the low organic matter soil is 72-84%. In this embodiment, the mass ratio of low organic matter soil to leachate is 3:1, and the water content of the mixe...

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Abstract

The invention discloses a method for improving low-organic-matter soil, and belongs to the technical field of soil improvement. The method comprises the steps of mixing low-organic-matter soil of which the organic matter content is lower than 1% with domestic garbage landfill percolate which is smaller than 0.1 in the ratio of biochemical oxygen demand to chemical oxygen demand, in the mass ratioof the low-organic-matter soil to the domestic garbage landfill percolate being (2.5-5.3) to 1, spreading and placing mixed soil under aerobiotic condition, continuously replenishing percolate to themixed soil along with reduction of moisture in the mixed soil so as to always maintain the water ratio in the mixed soil unchanged, and when the organic matter content of organic matter soil in the mixed soil is greater than 3%, stopping replenishing the percolate. According to the method disclosed by the invention, the domestic garbage landfill percolate and the low-organic-matter soil are stablycombined under the aerobiotic condition, the operation is simple and convenient, resource utilization of the domestic garbage landfill percolate can be realized, improvement cost of the low-organic-matter soil and the treating quantity of the garbage percolate are reduced, the capacity of the low-organic-matter soil for preserving moisture and fertility and the nutrient content of the low-organic-matter soil can be increased, and effective improvement of the low-organic-matter soil can be realized.

Description

technical field [0001] The invention specifically relates to a method for improving soil with low organic matter, and belongs to the technical field of soil improvement. Background technique [0002] Soil improvement requires the use of soil science, ecology and other multidisciplinary theories and technologies 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, soil structure improvement, etc. Among them, barren soil, that is, soil with low organic matter, is widely distributed in Northwest my country, and has the characteristics of low viscosity, weak water and fertilizer retention capacity, 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 availa...

Claims

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Application Information

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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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