Degraded alpine meadow grazing forbidding recovery effect evaluation method

Abstract

The invention provides a degraded alpine meadow grazing forbidding recovery effect evaluation method, and relates to the technical field of alpine meadow grazing forbidding recovery effect evaluation.According to the method, a network analysis method is introduced, quadrat investigation and community analysis methods are combined, and the alpine meadow ecosystem structure and function are comprehensively evaluated by comparing community structure similarity, key species, community network connectivity, clustering degree and productivity of healthy alpine meadows and grazing forbidding alpinemeadows. The recovery effect of the degraded alpine meadow after forbidding grazing is accurately evaluated. The method can solve the problems that the grazing forbidding age limit of the degraded alpine meadow sis not clear and a reasonable recovery effect evaluation method is lacked, can avoid biochemical succession in the alpine meadow caused by overlong grazing forbidding age limit on the basis of recovering the degraded alpine meadows, fully utilizes grassland resources, and achieves a multi-win effect.

Description

technical field [0001] The invention belongs to the technical field of evaluating the recovery effect of grazing prohibition on alpine meadows, and in particular relates to a method for evaluating the recovery effect of grazing prohibition on degenerated alpine meadows. Background technique [0002] The northern Tibetan plateau is an important plateau characteristic animal husbandry production base in my country, and it is also the source area of ​​major rivers such as the Yangtze River and the Nu River. It is an important ecological security barrier for my country and South Asia, with remarkable ecological and production functions. However, in recent years, due to climate change, land use change, overgrazing, and frequent occurrence of biological disasters, alpine meadows on the northern Tibetan Plateau have experienced large-scale degradation. Although the degradation trend has been curbed in recent years, the overall degradation situation is still more severe. [0003] G...

AI Technical Summary

Problems solved by technology

However, grazing prohibition cannot be indefinite. Long-term grazing prohibition is not only detrimental to the stability of the meadow ecosystem, but may also lead to mesochemical succession from alpine meadow to alpine grassland, and is not conducive to the use of grassland and the development of grass husbandry. The impact of social and economic development in alpine pastoral areas

Up to now, some studies have pointed out that the suitable period of grazing prohibition for alpine meadows is 6-10 years, and these studies use grassland productivity as the main measure to evaluate the vegetation restoration effect under the condition of grazing prohibition, but the accuracy and reliability have been questioned

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