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Method for treating and controlling desertificated land

A land and soil technology, applied in chemical instruments and methods, biochemical equipment and methods, soil conditioning materials, etc., can solve problems such as desertification and desertification, and achieve good results

Inactive Publication Date: 2004-07-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to fundamentally solve the problem of land desertification and desertification. After many years of research, we have found a new method for controlling land desertification and desertification, that is, to restore and rebuild the soil micro-ecology for land that needs to be controlled. Solve the environmental problems of plant survival, plant drought-tolerant plants on the land at the same time, and adopt modern bioengineering technology to control desertification and desertification land. This method can fundamentally solve the problem of soil desertification and desertification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select about 50 mu of sandy land that needs to be treated, and look for fertile soil with similar natural conditions nearby. Take about 500 kg and mix it with 500 kg of topsoil of the land to be treated. Refer to the improved medium of Chu No.10 for cultivating algae and Allen and Amon for cultivating algae The improved medium formula (Fu Hualong et al., Phycology Tutorial P406-P408, Sichuan University Press, 1993), add the necessary nutrient elements nitrogen, phosphorus, potassium, calcium, magnesium, iron, Boron, manganese, zinc, molybdenum and water, so that the water content is about 25%, then mix them evenly, and stack them in a half shade and half sun place with a thickness of 5 to 10 cm, and stack them for 7 to 30 days or longer time, and keep the water content at about 25%, let the microorganisms in it reproduce rapidly, and then spread the soil and the organisms in which the microorganisms have been cultivated on the land to be treated, and at the same time, ac...

Embodiment 2

[0022] Select a piece of sandy land that needs to be treated, analyze the main mineral element content, and supplement the lack of nutrients nitrogen, phosphorus, potassium, calcium, magnesium, iron, boron, manganese, Zinc and molybdenum, and at the same time, plant drought-tolerant plants on the treated land, and then cover the entire surface with sunshade nets and secure the sunshade nets. This example is especially suitable for application in areas with a certain amount of rainfall or a certain water content in the soil and a large area to be treated.

Embodiment 3

[0024] First determine the land to be treated, and then isolate the algae and fungi suitable for the growth of the area, such as Chlamydomonas sp., Nostoc sp., Anabaena sp., Chlorooccum sp.), Anabaenopsis sp., Pseudomonas fluorescens (Beijing Institute of Microbiology, Chinese Academy of Sciences, strain collection catalog p48, bacteria 1.220), potassium-solubilizing bacteria (Bacillus mucilaginosus, strain collection catalog p8, Institute of Microbiology, Chinese Academy of Sciences, Bacteria 1.910), nitrogen-fixing bacteria (Azotobacter vinelandii, Chinese Academy of Sciences Institute of Microbiology strain preservation catalog p6, bacteria 1.824) etc., respectively carry out industrialized large-scale cultivation of their main species, such as algae can establish large open-air cultivation pools, and fungi can be carried out on a large scale solid and liquid fermentation cultures. In this way, a large number of algae and fungus individuals can be obtained, and then these c...

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Abstract

The present invention relates to a method for controlling desertified land, and starting with the restoring and reconstructing microecologic environment and including the following three steps: (A). making enrichment culture of microbial algae and fungi in the microecologic environment of land block to be controlled; (B) separating out dominant group from them, using modern bio-engineering technique to make large-scale culture, then inoculating the cultured organism into the land block to be controlled; and (C). directly adding nutrient elements necessary for microbial algae and fungi into the land block to be controlled, at the same time planting drought-resistant plants, and utilizing sunshading net to cover and fix then on the controlled land block surface.

Description

1. Technical field [0001] The invention relates to ecological environment protection engineering technology, in particular to a treatment method for sandy land, desertified land, also known as desertified land. 2. Background technology [0002] Today, the degradation of soil resources has become a serious global problem. The number of people threatened by desertification in the world is nearly 2 billion, and 5 to 7 million hectares of cultivated land are still turned into deserts every year. my country is one of the countries with the most severe desertification in the world. The total area of ​​desertified land has reached 3.73 million square kilometers, and the annual expansion rate is 2460 square kilometers. The annual direct economic loss due to desertification is as high as 54 billion yuan. The grasslands in Aba Prefecture and Ganzi Prefecture in Sichuan are rapidly desertifying, the large deserts in Gansu, Xinjiang, Tibet and Qinghai are expanding, the grasslands in In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/00C05F11/08C09K17/00C12N1/00C12S99/00
Inventor 付华龙
Owner SICHUAN UNIV
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