退化高寒草甸暖季休牧恢复过程中植被和土壤特性

为探讨暖季休牧恢复过程中退化高寒草甸植被和土壤恢复特性,本研究对泽库县退化高山嵩草草甸暖季休牧样地不同恢复阶段植被和土壤特性进行调查,结果显示植被高度、地上生物量、土壤含水量、土壤有机碳含量等生态功能属性随自然恢复时间的延长不断得到改善(P<0.05),在恢复末期(9—10年)恢复最好;植被盖度、地下生物量、多样性、土...

Vegetation and Soil Characteristics During Restoration of Grazing Rest in Warm Season of Degraded Alpine Meadows

In order to investigate the recovery characteristics of vegetation and soil in degraded alpine meadows restoration during warm season,this study investigated the vegetation and soil characteristics of degraded alpine Kobresia meadows in Zeku at the different recovery stages during rest grazing warm season.The results show that the ecological characteristics of vegetation height,above-ground biomass,soil water content and soil organic carbon content continue to improve over time(P<0.05),and reached a maximum at the end of restoration period(9 to 10 years).Recovery effects such as vegetation cover,below-ground biomass,diversity and soil capacity increased gradually and tend to be stable in the later and end recovery stages.With the extension of rest grazing time,the survival state index of Elymus nutans gradually increased,and reached 10.27 at the end of recovery period,while the survival state index of the indicator species of vegetation degradation,Ligularia fulgula and Saussurea nigrescens,decreased gradually,which were gradually replaced,from high dominant species,by species such as Elymus nutans.The comprehensive evaluation of grassland quality suggested that the grassland quality score was the best at the end of the restoration period.This study provided a theoretical basis for promoting the implementation of warm-season no grazing to restore degraded alpine meadows.