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Method for improving desert and semi-desert soil by soil algae

A soil and desert technology, applied in the field of improvement of desert and semi-desert soil by soil algae, can solve difficult and rare problems, achieve the effect of convenient operation, increase water content, and promote stability

Inactive Publication Date: 2005-08-17
INST OF AQUATIC LIFE ACAD SINICA
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Problems solved by technology

Due to the fragility of the desert ecosystem, there are few successful cases of soil improvement in deserts and semi-deserts. The main improvement methods include physical, chemical and biological methods. Introduction and domestication and genetic improvement, effective use and management of desert water, etc.; however, these technical methods have varying degrees of difficulties and weaknesses in practical application

Method used

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  • Method for improving desert and semi-desert soil by soil algae

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Embodiment

[0016] Concrete steps of soil algae improving desert and semi-desert soil:

[0017] A. Separation and purification of algae species: collect microbial crusts from the semi-desert area of ​​Siziwang Banner, Inner Mongolia, soak each gram of soil in 20mL sterile water for 12-24 hours, stir 12-24 times during the soaking process; -1 to 10 -8 Dilute, inoculate the aqueous solution onto a solid plate with a sterile dropper, add 0.04 mL of soil suspension to each plate for cultivation, and obtain a variety of algal colonies in about 21 days, mainly including Oscillatoria, Microcoleum, Nostoc, and Monofidus Algae, Chlorella, Chlorella, Protococcus; pick out the above-isolated algae species with a sterile inoculation needle or dissection needle, wash 3-4 times in sterile culture medium, and inoculate them on agar plate culture dishes Culture in; this step is repeated 8-10 times to obtain a single colony of purified culture;

[0018] B. Cultivation, screening and storage of algae spe...

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Abstract

The process of improving desert soil and semi-desert soil with soil algae includes the steps of: 1. separating algae from soil crust and performing solid plate culture for purifying; 2. inoculating algae seed to liquid and ventilating to culture, selecting algae seed with practical value, centrifugally collecting and drying for storage; 3. re-compounding dried algae with water to restore activity for spread culture; 4. exercising via simulating field environment to make algae suit to varying environment; 5. inoculating the algae to desert soil and semi-desert soil, covering with mulching and spraying nutritious liquid for culture; and 6. field management. By means of the growth, propagation and cell secretion of algae in soil surface, the present invention raises the organic matter content in soil and water content in soil, promotes soil structure stability and improves the physical, chemical and biological characteristics of soil effectively.

Description

technical field [0001] The invention relates to the field of soil improvement, and more specifically relates to a method for improving desert and semi-desert soil by soil algae. Background technique [0002] Desertification is a global environmental problem, and its expansion trend has seriously threatened the sustainable development of human society. At present, the land area affected by desertification on the earth is 38 million km 2 , accounting for 1 / 4 of the land area. In recent years, about 6 million hm 2 Desertification occurs in the land and has a tendency of continuous expansion, and my country is one of the countries with serious desertification hazards; according to the second national desertification monitoring, the desertification area in my country has reached 2.674 million km2 2 , and at an annual rate of 10,400 km 2 speed expansion. The increasingly serious desertification not only poses a serious threat to the economic and social ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/14C12S99/00
Inventor 毕永红胡征宇
Owner INST OF AQUATIC LIFE ACAD SINICA
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