Responses of plant growth and substance allocation of three dominant plant species to experimental warming in an alpine grassland, Northwestern Sichuan, China Effect of Experimental Warming on Carbon and Nitrogen Content of Sub-alpine Meadow in Northwestern Sichuan A study on the influence of grazing disturbance on soil fauna communities in subalpine meadows Soil nitrogen characteristics of grassland on sandy soil undergoing vegetation restoratio CHARACTERISTICS OF SOIL NITROGEN AND CARBON OF PASTURES UNDER DIFFERENT MANAGEMENT IN NORTHWESTERN SICHUAN Changes in soil nitrogen characteristics during grassland desertification in Northwest Sichuan Effect of temperature enhancement on community structure and biomass of subalpine meadow in Northwestern Sichuan