Interacting Effects of Nitrogen Addition and Mowing on Plant Diversity and Biomass of a Typical Grassland in Inner Mongolia

It is unclear how N addition and mowing interactively affect grassland community structure function. We studied the short-term effects of on species diversity biomass a typical in Inner Mongolia using split-plot design, with whole plot representing treatment subplot rate. Three stubble heights were set at 10 cm (M2), 6 (M3) 3 (M4), no-mowing (M1) was also included. consisted five rates, i.e., 0 (N1), 2 (N2), 5 (N3), (N4) 20 (N5) g m2.yr−1. Mowing significantly increased diversity. height (M2) both biomass. Heavy (3 height, M4) weakened difference C. squarrosa caused by addition. Species richness decreased, while Leymus chinensis increasing alleviated negative richness, this effect influenced height. Community L. tended to be stable when greater than The saturation threshold much lower that negatively correlated Gini coefficient litter production, which indicated light competition accumulation important factors affecting decrease our study.