作物学报2024，Vol.50Issue(8)：1885-1895,11.DOI:10.3724/SP.J.1006.2024.34195
豆科作物轮作强化农田生态系统功能的研究进展
Research progress on the intensification of agroecosystem functions through legume-based crop rotation
摘要
Abstract
Although intensive agriculture plays a crucial role in ensuring global food security,the conflict between its environ-mental costs and sustainable development is becoming increasingly prominent.Legume inclusion into agroecosystem is vital for improving soil health,enhancing agroecosystem stability,and achieving resource utilization efficiency.This paper provides a sys-tematic summary of the main effects of the legume-based rotation on crop production and soil function as follows:1)Legume enhance soil nitrogen(N)content through biological N fixation,high-quality rhizosphere exudates input,and straw incorporation,resulting in positive legacy effects.This,in turn,benefits the subsequent crop yields,particularly in agroecosystems with low soil fertility.2)Although the biological N fixation of legumes poses the risk of increasing CO2 emissions,it can mitigate greenhouse gas emissions by reducing N fertilization in the rotation.3)The low C/N ratio and high N content of legume straw promote soil microbial activity and microbial residue accumulation,thereby improving soil carbon sequestration efficiency.However,the lim-ited amount of straw for legumes restricts C sequestration.4)Legumes can improve water and fertilizer utilization efficiency of subsequent crops,and optimizing the root depth between legume and subsequent crop can enhance the overall efficiency of water and fertilizer usage in the rotation.In conclusion,the inclusion of legumes in crop rotation can achieve a reduction in N fertilizer usage and an increase in yield.However,the effects of soil carbon sequestration and greenhouse gas emission reduction are influ-enced by various factors such as crop type,fertilizer input,soil,and climate conditions.Exploring the coupling mechanisms be-tween the effects of legumes on subsequent crop yield and belowground ecological functions is of great significance.Developing field management technologies for legume-based crop rotation and designing new ecological and efficient cropping systems suit-able for various regions in China will facilitate the construction and implementation of legume-based rotations,contributing to agricultural green development.关键词
谷物豆科/豆禾轮作/作物生产力/土壤功能/经济效益Key words
grain legumes/crop rotation/crop productivity/soil ecosystem multifunction/economic benefit引用本文复制引用
刘春燕,张利影,周杰,许依,杨亚东,曾昭海,臧华栋..豆科作物轮作强化农田生态系统功能的研究进展[J].作物学报,2024,50(8):1885-1895,11.基金项目
本研究由国家重点研发计划项目(2022YFD1901100)和国家自然科学基金项目(32101850,422073880)资助.This study was supported by the National Key Research and Development Program of China(2022YFD1901100)and the National Natural Science Foundation of China(32101850,42207388). （2022YFD1901100）
