Effects of Grazing, Extreme Drought, Extreme Rainfall and Nitrogen Addition on Vegetation Characteristics and Productivity of Semiarid Grassland.

ABSTRACT: Grassland use patterns, water and nutrients are the main determinants of ecosystem structure and function in semiarid grasslands. However, few studies have reported how the interactive effects of rainfall changes and nitrogen deposition influence the recovery of semiarid grasslands degraded by grazing. In this study, a simulated grazing, increasing and decreasing rainfall, nitrogen deposition test platform was constructed, and the regulation mechanism of vegetation characteristics and productivity were studied. We found that grazing decreased plant community height (CWM_height) and litter and increased plant density. Increasing rainfall by 60% from May to August (+60%) increased CWM_height; decreasing rainfall by 60% from May to August (-60%) and by 100% from May to Jun

SUBMITTER: Zhang J 

PROVIDER: S-EPMC9859310 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature