Soil Nutrient Elements of Trampling Disturbance Kobresia humilis Communities along the Highway in Na’qu, Tibet

摘要

The change of soil nutrient elements during restoration succession processes of high mountain meadow in Na’qu County, Tibet, was investigated. The results showed that with the trampling disturbance, the normal structure of soil is violated, soil quality worsened, leading to soil erosion and nutrient loss. The recoverage of soil is lagged behind vegetation when change depends on ele-ments of soil nutrient increase in mass. The content of total nitro-gen, total phosphorus and total potassium changed accordingly with total nutrient, and is remarkably correlated to the content of organic matter. The content of available phosphorus is complex and changes with biomass and soil pH. The content of available potassium change was different from that of total nitrogen, total phosphorus and total potassium, and was increasing with tram-pling, and the change was relatively little during successive stages.