Crop residue return achieves environmental mitigation and enhances grain yield : a global meta‑analysis
Liu, Ji (Chinese Academy of Sciences. Institute of Earth Environment. State Key Laboratory of Loess and Quaternary Geology)
Fang, Linchuan (Wuhan University of Technology. Hubei Key Laboratory of Mineral Resources Processing and Environment)
Qiu, Tianyi (Northwest Agriculture and Forestry University. College of Natural Resources and Environment)
Chen, Ji (Chinese Academy of Science. Institute of Earth Environment. State Key Laboratory of Loess and Quaternary Geology)
Wang, Hai (Central China Normal University. Hubei Province Key Laboratory for Geographical Process Analysis and Simulation)
Liu, Muxing (Central China Normal University. Hubei Province Key Laboratory for Geographical Process Analysis and Simulation)
Yi, Jun (Central China Normal University. Hubei Province Key Laboratory for Geographical Process Analysis and Simulation)
Zhang, Hailin (Central China Normal University. Hubei Province Key Laboratory for Geographical Process Analysis and Simulation)
Wang, Cong (Central China Normal University. Hubei Province Key Laboratory for Geographical Process Analysis and Simulation)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Chen, Li (Northwest Agriculture and Forestry University. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau)
Huang, Min (Wuhan University of Technology. Hubei Key Laboratory of Mineral Resources Processing and Environment)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2023
Resum:	Inorganic fertilizers are widely used to provide crops with significant amounts of nitrogen (N) and phosphorus (P), but can exacerbate soil carbon (C) limitation and acidification. Crop residues with distinct ecological stoichiometry from inorganic fertilizers can help balance soil ecological stoichiometry and thus increase soil organic matter accumulation. The combined use of inorganic fertilizers and crop residues is expected to alleviate the metabolic limitations of organisms and enhance soil C, N, and P sequestration, hence increasing grain yields. However, the effects of this practice on soil C, N, and P stocks and grain yield remain unclear. In this study, we conducted a meta-analysis of 806 paired data to investigate the impact of crop residue return combined with inorganic fertilizer on soil and grain yield across different land uses (paddy, upland, paddy-upland rotation) and soil profiles (0-60 cm). Our findings indicate that crop residue return significantly enhances soil C (8-13%) stocks across all soil layers, particularly in the topsoil (0-20 cm). Soil N (9%) and P (5%) stocks also increase significantly in the topsoil. In uplands, crop residue return can mitigate soil acidification and increase grain yield (by 7%). Moreover, the soil C and N stocks increase depending on the initial soil pH, C and N levels, and C:N ratio. In contrast, the soil P stock increase depends on rainfall, while the grain yield increase is closely linked to the soil texture and fertilizer rate. Our study highlights that crop residue return can increase topsoil C, N, and P stocks, which can benefit crop growth and environmental mitigation efforts. Furthermore, this practice can increase C stocks in deeper soil horizons (below 20 cm), providing a long-term solution to mitigate climate change.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Organic fertilizer ; Nutrient balance ; Soil profile ; Food security ; Climate change ; Land use ; Crop residue return
Publicat a:	Agronomy for Sustainable Development, Vol. 43, issue 6 (Dec. 2023) , art. 78, ISSN 1773-0155

DOI: 10.1007/s13593-023-00928-2

Disponible a partir de: 2024-12-30 Postprint

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