[目的]探明黄河源区高寒草甸不同退化阶段的草地特征.[方法]以曲麻莱县麻多乡高寒草甸作为研究对象,通过对不同退化梯度高寒草甸的植物特征、群落特征和土壤特征进行调查和研究,确定这些特征与高寒草甸草地退化之间的关系.[结果]随高寒草甸草地退化程度的加剧,物种多样性指数、可食牧草产量、土壤的养分含量和含水量均表现为降低规律;鼠害在轻度退化和重度退化的草地上表现较为严重,而在原生植被和极度退化草地上的程度则较轻度退化和重度退化的轻.[结论] 黄河源区高寒草甸不同退化阶段草地具有不同特征.%[Objective] The study aimed to proved the characteristics of alping meadow in the Yellow River Source Area. [Method] Using the Maduo Town of Qumalai County alpine meadow as research object, based on surveying and studying plant characteristics, community characteristics and soil characteristics of the degradation of different gradient alpine meadow, the relationship between these features and alpine meadow grassland degradation were determined. [Result] The results showed that with the intensification of the alpine meadow grassland degradation, the law of species diversity index, edible forage production, soil nutrient and moisture content had shown lower. Rodent infestation in mild and severe degradation of grassland was on the performance of the more serious, and in the original vegetation and the extreme degradation of grassland on the extent was the lesser degree of light degradation and severe degradation. [Conclusion] The alpine meadow has different characteristics in different stages in the Yellow River Source Area.
展开▼
