温性荒漠草原植物群落特征对草原生态补奖政策的响应

Response of Plant Community Characteristics of Temperate Desert Steppe to the Subsidy and Reward Policy for Grassland Ecological Protection

【目的】通过2011年、2016和2021年草原植物的调查研究,了解草原生态补奖政策对温性荒漠草原植物群落特征的影响,揭示植物群落特征动态变化规律。【方法】以新疆巴里坤县温性荒漠草原为研究对象,采用实地调查法和数学分析法进行系统研究。【结果】结果表明:草原生态补奖政策实施后植物群落平均高度、盖度和地上生物量整体呈现升高的趋势;草原生态补奖政策的实施对加固温性荒漠草原主要植物群落优势地位更加明显;生态补奖政策实施10年,温性荒漠草原植物群落特征结构并未达到稳定状态,仍然处于变化之中。【结论】草原生态补奖政策对草原植物群落正向演替起到了积极作用,草原生态补奖政策实施10年,未使西北干旱内陆地区温性荒漠草原植物群落达到顶级群落。

【Objective】In order to explore the effects of subsidy and reward policy for grassland ecological protection(the policy)on plant community characteristics of temperate desert steppe based on the investigation and research of grassland plants in 2011,2016 and 2021,so as to reveal the dynamic changes of plant community characteristics.【Methods】Taking the temperate desert steppe in Barkol Kazakh Autonomous County as the research object,the field investigation and mathematical analysis method were used to conduct a systematic study.【Results】The results showed that:the average height,coverage and aboveground biomass of plant community showed an increasing trend after the implementation of the policy;the implementation of the policy was more prominent in strengthening the dominant position of the main plant communities in the warm desert grassland;after the implementation of the policy for ten years,the characteristic structure of plant community in temperate desert steppe had not reached a stable state and was still in change.【Conclusion】The policy has played an active role in the positive succession of grassland plant communities,however,the plant community of temperate desert steppe in arid inland area of northwest China has not reach the top level.