The response of litter decomposition to phosphorus addition in typical temperate grassland in Inner Mongolia

The productivity of terrestrial ecosystems is limited by soil fertility, such assoil phosphorus (P). decomposition litter the main process that affects nutrient cycling. To understand characteristics and release under P addition, we conducted a 2-year bag experiment at addition rates (0–12.5 g m−2 yr−1). All decomposed faster during second growing season due to highly concentrated precipitation, Stipa grandis (1.02–1.63 times) than Leymus chinensis treatments. L. mixed was more thoroughly 1 yr−1, while S. 5 yr−1. promoted nitrogen (N) immobilization all reached its maximum 12.5 Phosphorus increased β-glucosidase production but leucine aminopeptidase high P. ratio phosphatase over time, indicating N deficiency saturation late stages decomposition. Our results show Inner Mongolia's grasslands availability precipitation important in region's processes.