Haibei vegetation biomass & soil organic carbon

Low availability of nutrients and moisture constrains plant productivity and carbon cycle in grasslands. Global change, including increased nutrient deposition and altered precipitation patterns, has profoundly impacted vegetation biomass in alpine regions, as well as aboveground and belowground biomass allocation. These factors are critical for understanding carbon-climate feedback in the context of interacting environmental changes. Based on a 7-year field manipulation experiment in an alpine meadow on the northeastern Qinghai-Tibetan Plateau, we quantified the responses of aboveground biomass (AGB) and 0–40 cm belowground vegetation biomass (BGB) to nutrient addition (nitrogen, N; phosphorus, P; and potassium, K) and rainfall change (50% decrease and 50% increase), as well as depth-stratified responses of SOC, soil total nitrogen (STN), total phosphorus (STP), pH from 2022 to 2024