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Method for controlling sand dunes in high cold regions and application thereof in grassland restoration

A sand dune and high cold technology, applied in the field of desertification control, can solve problems such as the failure of desertification control technology, achieve the effect of improving local ecology and human settlements, and reducing the height of sand dunes

Inactive Publication Date: 2020-02-21
GANSU DESERT CONTROL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is a failure to copy the desertification control technology in the arid area in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the new sand-fixing material of the present invention preferably comprises: mixing the decomposed cow and sheep manure and black soil according to a mass ratio of 3:1, adding water to the obtained mixture, so that the water content of the mixture reaches 20-25%, and obtaining The new sand-fixing material. The present invention has no special limitation on the preparation method of the decomposed cow and sheep manure. It is preferable to collect a large amount of cattle and sheep manure accumulated around the cattle and sheep pens and tents of the herdsmen and transfer them to the flat quicksand area near the sand dune chain on the river bank. Hill, each hill about 20m 3 After pouring enough water, cover the surface with black soil and pat it down. Expose it to the sun for 10-15 days in summer (it takes more than a month in spring) to decompose. The black soil described in the present invention is preferably derived from large-area black soil b...

Embodiment 1

[0026] (1) Preparation of new sand-fixing material "cattle and sheep dung + black soil + water" artificial vegetation matrix

[0027] 1) Preparation of pollution-free decomposed cattle and sheep dung: First, collect a large amount of cattle and sheep dung accumulated around the cattle and sheep pens and tents of the herdsmen and transfer them to the flat quicksand on the river bank near the sand dune chain. about 20m 3 After pouring enough water, cover the surface with black soil and pat it down. Cow and sheep manure is very easy to ferment in a high-temperature and high-humidity environment. If it is exposed to the hot sun in July-August for 15 days, it can be fermented and decomposed; if it is in April-May in spring, it takes more than 45 days to ferment and decompose. After the fermentation is complete, turn it manually to make the mixture uniform, and set it aside for later use.

[0028] 2) Preparation of new sand-fixing material "cattle and sheep manure + black soil + w...

Embodiment 2

[0038] Carry out the same operation as Example 1 in Ruoergai County, Sichuan. After the fence is sealed and protected, the average growth height of the dominant protected species Qinghai oats in the half-slope of the dunes in the year of sowing is 53cm, the average height of the base of the dunes is 81cm, and the average density is 68cm. ~82 plants / m 2 , the average projection coverage is 13-24%; the average density of formula grass species is 478 plants / m 2 , with an average projection coverage of 39%. In the greening period of the second year, that is, in the middle and late May, the dead branches of Qinghai oats, a dominant protected species, are swept by a strong winter and spring wind, leaving only straw stubble with a height of about 15cm attached to the root system, which acts as a straw sand barrier and continues to protect The next year's growth of formula grass seeds. The average height of the formula grass seed growing to the beginning of September of the second y...

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Abstract

The invention provides a method for controlling sand dunes in high cold regions and an application thereof in grassland restoration, and relates to the technical field of desertification control. Themethod is based on the looseness and fluidity of mobile sand dunes and quicksand on a sand dune chain surface, utilizes the natural climate characteristics, such as obvious seasonality, concentrated rainfall, short plant growth period and the like in the first meander of Yellow River, combines the existing control technology and experience of desertification and degradation of plateau grassland, comprehensively researches and develops, and puts forward a key technology of double sand fixation and double grassland restoration of 'new sand fixation materials + dominant protection species' with innovative development thinking. Through the method and the application of the method, the technical problems of sand dune fixation and grassland restoration which is not solved for many years due to heavy wind and sand, violent sand layer flow, fast sand dune advancing speed and the like on the river terrace in the first meander of Yellow River are successfully and effectively solved.

Description

technical field [0001] The invention belongs to the technical field of desertification control, and in particular relates to a sand dune control method in an alpine region and its application in grassland restoration. Background technique [0002] The alpine ecosystems in northwestern Sichuan and southern Gansu have been severely degraded, large areas of grassland have been degraded by desertification, and Ruoergai (Zoige) Ma (Maqu) wetlands have shrunk severely. Especially in Maqu County, the first bend of the Yellow River, the Yellow River surrounds the majestic first bend of the Yellow River for 433 kilometers. As of 2007, a 119-kilometer-long sand dune chain has formed along the Yellow River, and the height of the sand dunes is 12 to 15 meters. During the 10 years from the census in 1994 to the review in 2004, the average growth rate of desertification area was 3.87%, 10 times the average growth rate of desertification in Gansu Province, especially in the large area of ​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/00A01G22/20A01B79/02
CPCA01B79/02A01G22/00A01G22/20Y02A40/22
Inventor 王祺杨雪梅唐进年袁宏波李银科
Owner GANSU DESERT CONTROL RES INST
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