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Method for improving compacted yellow clay in open waste dump

A soil dump and clay technology, applied in land preparation methods, botanical equipment and methods, horticulture, etc., can solve problems such as poor ventilation, aggravate the difficulty of vegetation reconstruction, improve survival rate and biomass, facilitate soil borrowing, The effect of improving the soil

Inactive Publication Date: 2019-06-04
CHNA ENERGY INVESTMENT CORP LTD +3
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  • Abstract
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Problems solved by technology

In particular, the loess on the surface of the dump site is viscous and poorly ventilated. In addition, the soil is compacted due to mechanical rolling, which makes it more difficult to rebuild vegetation.

Method used

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  • Method for improving compacted yellow clay in open waste dump
  • Method for improving compacted yellow clay in open waste dump
  • Method for improving compacted yellow clay in open waste dump

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Embodiment Construction

[0020] Test materials: The sand and yellow clay to be tested come from the Shenyanxiwan Open-pit Mine in Shenmu County, Yulin City, Shaanxi Province. After passing through a 1mm sieve, the soil was sterilized in an autoclave for 2 hours to kill the indigenous mycorrhizal fungi in the soil, and then air-dried for later use. The basic physical and chemical properties of yellow clay are: the content of available phosphorus is 2.72mg / kg, the content of available potassium is 86.74mg / kg, the pH value is 7.55, and the EC (conductivity) value is 91μs / cm. The clay content of the yellow clay is 85%, the soil compactness of the yellow clay reaches 3500KPa, and the soil bulk density is 1.8g / cm 3 . The sandy soil is aeolian sand, exfoliated from the surface of yellow clay, and its basic physical and chemical properties are: the content of available phosphorus is 6.13mg / kg, the content of available potassium is 50.38mg / kg, the pH value is 7.48, and the EC value is 52.5μs / cm . The clay co...

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Abstract

The invention provides a method for improving compacted yellow clay in an open waste dump. The method includes steps: well mixing sandy soil with the yellow clay according to a mass ratio of 1:1-3:1 to obtain a soil matrix; planting local adaptable plants in the soil matrix; performing inoculation of arbuscular mycorrhizal fungi propagules in the soil matrix at the root of each plant; cultivatingthe plants to realize fungi-plant symbiosis. By mixing of the sandy soil with the yellow clay according to a certain ratio, the method has advantages of convenience and quickness in soil acquisition,extensive sources, low cost and suitableness for quick structural improvement of the compacted yellow clay in the local open waste dump are realized; by inoculation of arbuscular mycorrhizal fungi, the vegetation survival rate and biomass can be increased, soil improvement is realized without negative effects, and the like.

Description

technical field [0001] The invention belongs to the technical field of soil improvement and relates to the improvement of yellow clay soil. Background technique [0002] The western part of my country is an arid and semi-arid water-deficient area, and the water resource share is only 3.9% of the whole country. Most of the soil fertility is relatively poor, the ecology is fragile, and the output of crops is low. For my country, a large agricultural country, improving the fertility of farmland soil and increasing water use efficiency will be the main problems that need to be solved urgently in the west. [0003] The surface soil of the western open-pit mine dump is barren, and the core soil layer is piled up immaturely, which leads to a series of serious ecological problems such as poor soil structure, reduced fertility and difficult vegetation reconstruction. The key to ecological restoration is to first build a good soil ecological environment, first build a good soil hierar...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G22/20A01G22/40A01G18/10
Inventor 全文智龚云丽刘慧辉雷志勇
Owner CHNA ENERGY INVESTMENT CORP LTD
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