Effects of grazing intensity on soil nutrient of Kobresia pygmaea meadow in Tibet Plateau

The present study was to investigate the effects of grazing intensity on soil organic matter, pH, total nitrogen, available nitrogen, total phosphorus, available phosphorus, total potassium, and available potassium in soil of Kobresia pygmaea meadow community of Tibet plateau. The results showed that the contents of soil total nitrogen, available nitrogen and available potassium decreased, while the contents of total potassium increased firstly and then decreased with the increasing of grazing intensity. Heavy grazing intensity significantly reduced the contents of total nitrogen, available nitrogen, available potassium and available phosphorus(P0.05). The results suggested that delayed grazing with moderate grazing intensity could protect grassland from degeneration.