Compounding method for biological fixing shifting sand and reclaiming desertified land

A quicksand and land technology, applied in botany equipment and methods, horticultural methods, plant regeneration, etc., can solve problems such as poor effect, aging of fixatives, and non-reuse of land, so as to prevent soil erosion and the method is easy to implement Effect

Inactive Publication Date: 2005-01-12
INST OF AQUATIC LIFE ACAD SINICA
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Problems solved by technology

As the situation of desertification becomes increasingly serious, governments and experts in various disciplines are trying their best to find better control measures. Various methods, whether mechanical, chemical or biological, have been adopted one after another. Among them, mechanical sand fixation is heavy, The effect is not good; chemical fixation has problems such as the aging of the fixative and the inability of the land to be reused; the comprehensive treatment combined with biology is a promising way to fundamentally control the desert and change the environment, but currently this field is limited to higher drought-tolerant plants introduction and domestication, optimal selection and rational allocation of shelterbelts, etc.

Method used

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Embodiment Construction

[0014] A kind of composite method (algae-grass-shrub-tree) of biological fixation of quicksand and restoration of desertified land is carried out as follows:

[0015] 1. Selection and cultivation of algal species

[0016] 1.1 Algae species selection Microcoleus vaginatus and Scytonema javanicum were selected as algal species for large-scale cultivation through isolation, purification and cultivation in desert crusts;

[0017] 1.2 Preparation of algae culture solution Add the following substances per liter of water and mix well: sodium nitrate 1500mg / L; citric acid, 6mg / L; dipotassium hydrogen phosphate trihydrate, 40mg / L; ferric ammonium citrate, 6mg / L; sodium carbonate , 20mg / L; trace elements, 1ml / L; magnesium sulfate heptahydrate, 75mg / L; disodium edetate, 1mg / L; calcium chloride dihydrate, 36mg / L.

[0018] 1.3 The algae culture is carried out in three-stage expanded cultivation, that is, the three-stage unit of 20L culture bottle, 0.5-1.5m×3.5-4.5m×0.2-0.5m circulation po...

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Abstract

A biologic method for immobilizing shifting sand and repairing the deserted land includes choosing proper phycophyta, herbage, shrub and tree, designing spray irrigation system, interplanting them, large-scale culturing of phycophyta, and periodicall spray irrigation.

Description

technical field [0001] The invention relates to the interdisciplinary fields of biotechnology, ecological engineering and environmental science, and more specifically relates to a composite method for biologically fixing quicksand and repairing desertified land. Background technique [0002] In 1999, the total area of ​​desertified land in the country was 2.674 million square kilometers, accounting for 27.9% of the total land area. As the situation of desertification becomes increasingly serious, governments and experts in various disciplines are trying their best to find better control measures. Various methods, whether mechanical, chemical or biological, have been adopted one after another. Among them, mechanical sand fixation is heavy, The effect is not good; chemical fixation has problems such as the aging of the fixative and the inability of the land to be reused; the comprehensive treatment combined with biology is a promising way to fundament...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H4/00A01H13/00
Inventor 刘永定陈兰洲沈银武谢作明李敦海胡春香
Owner INST OF AQUATIC LIFE ACAD SINICA
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