Precipitation regulates the response of salinized grassland net primary productivity to nitrogen addition and mowing in the agro-pastoral zone

AimsIn the salinized grassland of the agro-pastoral ecotone with limited nutrients, the increase of nitrogen input induced by agricultural fertilization and the change of land use patterns usually causes changes in soil available nutrients, which could further affect the net primary productivity of plants.However, due to the impact of annual precipitation, it is still uncertainty about whether the response of net primary productivity of plants to nitrogen addition and mowing varies with changes in rainfall. MethodsThis study investigated plant net primary productivity under nitrogen addition and mowing at salinized grassland in the agro-pastoral ecotone of northern China, based on the experimental platform for nitrogen forms