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Method for improving soil by utilizing biomass carbocoal

A technology for improving soil and biomass, applied in the field of soil improvement, can solve problems such as environmental pollution and waste of resources, and achieve the effects of reducing residues, increasing water storage capacity, and improving structure

Active Publication Date: 2013-05-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country's agricultural and forestry production, a large amount of biomass that can be used to produce biomass semi-coke is produced every year, and most of these biomass are directly incinerated, which not only wastes resources, but also pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Pesticide residue soil: For soil with 30ng / g of organic chlorine residue, the amount of biomass semi-coke needed to be added per mu is 1.5 tons. The biomass semi-coke is evenly spread on the ground, and then the land is plowed and plowed The depth is 20cm, so that the semi-coke is fully mixed with the soil. After the biomass semi-coke is applied, the land is irrigated, and then agricultural production and field management are carried out as normal land. In that year, the pesticide residues in corn produced could meet the national standards. For soil with an organic chlorine residue of 50ng / g, the amount of biomass semi-coke needed to be added per mu is 2 tons, and the pesticide residues of the corn produced that year can meet the national standards. For soil with an organic chlorine residue of 70ng / g, the amount of biomass semi-coke needed to be added per mu is 3 tons, and the pesticide residues of the corn produced that year can meet the national standards.

Embodiment 2

[0029] Pesticide residue soil: For soil with an organophosphorus pesticide residue of 300ng / g, the amount of biomass semi-coke added is 1.3 tons per mu, and the pesticide residue of the watermelon produced that year can meet the national standards. For the soil with an organic phosphorus pesticide residue of 500ng / g, the amount of biomass semi-coke added is 1.5 tons per mu, and the pesticide residue of the watermelon produced that year can meet the national standard. For soil with an organic phosphorus pesticide residue of 700ng / g, the amount of biomass semi-coke added is 3 tons per mu, and the pesticide residue of the watermelon produced that year can meet the national standard.

Embodiment 3

[0031] Aeolian sandy soil: For mildly weathered soil, using the above method, the amount of biomass semi-coke is 0.7 tons per mu, the plowing depth is 20cm, the irrigation water is controlled at 150 cubic meters / mu, the crop is corn, and the seeding rate is 1.75 Kg / mu. The soil desertification was significantly improved in that year, the seedling rate was 90%, and the grain yield was 500 kg / mu. For heavily weathered soil, using the above method, the amount of biomass semi-coke is 1.8 tons per mu, the plowing depth is 20 cm, the irrigation water volume is controlled at 150 cubic meters / mu, the crop is corn, and the seeding rate is 1.75 kg / mu. In that year, the soil desertification was significantly improved, the seedling rate was 90%, and the grain yield was 450 kg / mu.

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Abstract

The invention relates to a method for improving soil by utilizing biomass carbocoal, in particular to a method for improving soil with pesticide residues, desertification soil and salinization soil by utilizing biomass carbocoal. The method comprises the following steps of: applying the required biomass carbocoal, which serves as a soil modifier, of agriculture and forestry according the degrees of the pesticide residues, desertification and salinization of the soil to be improved, and ploughing the soil, so that the carbocoal and the soil are mixed fully; and after applying the biomass carbocoal, irrigating the soil, and performing agricultural production and field management in the same way as theses performed on normal lands. Compared with the prior art, the method has the advantages that: the structure of the soil can be improved, the water storage capacity and ion exchange capacity of the soil can be improved effectively, the residual quantity of pesticides can be reduced, and the organic matter content of the soil can be increased; and thus, the problems of the pesticide residues, desertification and salinization of the soil are solved, the yield and quality of planting crops are increased, and the method has high economic and environmental benefits.

Description

Technical field [0001] The invention relates to a soil improvement method, in particular to a method for improving pesticide residue soil, windy sandy soil and salinized soil by using biomass semi-coke, and belongs to the technical field of soil improvement. Background technique [0002] my country has a vast territory, but the area of ​​arable land that can be used for agricultural production is relatively small, and has been decreasing year by year in recent years. The existing cultivated land area is about 1.8 billion mu, which only accounts for a little over 10% of the country's land area. In order to ensure my country's food supply, the land has to be used for agricultural production for a long time in agricultural production, and a large amount of pesticides and fertilizers are needed to ensure the yield of crops. This makes the land prone to compaction and pesticide residues. For such problems, there are currently some related patents, such as CN02108353.3, CN03114579.5 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B77/00
Inventor 由长福陈昌和张东柯
Owner TSINGHUA UNIV
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