Method for defining degradation degree of high-cold steppe

A degraded, high-cold technology, applied in the field of restoration ecology of degraded grassland, can solve the problems affecting the restoration, governance and management efficiency of degraded alpine grassland, and achieve the effect of quick and rapid definition, easy identification and quantification, and improved practicability.

Inactive Publication Date: 2011-08-03
CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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Problems solved by technology

At present, there are no reports on scientifically simple and operable indicators to define the degree of degradation, which affects the restoration and management efficiency of degraded alpine grasslands

Method used

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Embodiment Construction

[0029] A method for defining the degree of degradation of alpine grasslands, comprising the following steps:

[0030] (1) Select the alpine grassland area with an altitude of 4000m to 4700m and a rainfall of 100 to 400mm as the defined range of the alpine grassland.

[0031] (2) Various indicators for determining the degradation level of the alpine grassland:

[0032] When the dominant species in the plant community is xerophytic or mesophytic gramineous plants, the coverage of gramineous plants is >30%, the relative proportion of aboveground biomass of gramineous plants is 100%, the proportion of aboveground biomass of edible pastures is 70%, and the organic matter When the content is 15-35g / kg, it is judged that the grassland quality is not degraded, and the alpine grassland degradation level is the original vegetation;

[0033] When the dominant species in the plant community is xerophytic or mesophytic gramineous plants + weeds, the coverage of gramineous plants is 20-30%...

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Abstract

The invention relates to a method for defining the degradation degree of a high-cold steppe. The method comprises the following steps of: (1) selecting a defining range; (2) determining various indexes of the degradation level of the high-cold steppe; (3) randomly selecting dozens of communities from the high-cold steppe and determining plant community dominant species in the high-cold steppe; (4) determining the coverage of graminaceous plants in each plant community dominant specie and initially classifying according to the indexes in the step (2); (5) determining the aboveground biomass relative scale of the plant community dominant species in each community and the aboveground biomass relative scale of edible grass and classifying once again according to the indexes in the step (2); (6) measuring the organic matter content distribution range of a surface soil sample of each community; and (7) comparing and verifying the organic matter content distribution range obtained in the step (6) with the organic matter content distribution range in the step (2) and finishing defining when the accuracy is over 90 percent. The method disclosed by the invention is simple, quick and accurate and ensures that the rehabilitation and protection of a degraded high-cold steppe are specific and scientific.

Description

technical field [0001] The invention relates to the technical field of restoration ecology of degraded grassland, in particular to a method for defining the degree of degradation of alpine grassland. Background technique [0002] The importance of the diagnosis of grassland degradation degree to the restoration of degraded grassland has been valued by many scholars at home and abroad. Chen Lingzhi (1995) believed that in order to restore and rebuild biodiversity, it is necessary to understand the degree of ecosystem degradation and provide a theoretical basis for restoration measures and species selection. Li Bo (1997) divided the degree of grassland degradation into four levels according to the composition of plant species, aboveground biomass and coverage, ground cover and surface conditions, and soil condition system structure: mildly degraded, moderately degraded, severely degraded and extremely degraded. degradation. Li Dexin (1980) proposed a method of quantitative a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G7/00A01G15/00
Inventor 周华坤赵新全董全民徐世晓赵亮温军叶鑫
Owner CHINA ACAD OF SCI NORTHWEST HIGHLAND BIOLOGY INST
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