Nitrogen fertilizer fate after introducing maize and upland-rice into continuous paddy rice cropping systems
作者： Yao He , Eva Lehndorff , Nicolas Brüggemann , Wulf Amelung , Reiner Wassmann
DOI: 10.1016/J.AGEE.2018.02.021
关键词:
摘要: Water scarcity and economic incentives favor the introduction of upland crops into permanent paddy rice systems during dry seasons. However, introducing upland crops into permanently flooded cropping systems temporarily changes soil conditions from anaerobic to aerobic, affecting nitrogen (N) dynamics profoundly. We hypothesized that under maize and dry rice, total fertilizer 15 N recovery in soil as well as the immobilization of fertilizer 15 N in microbial residues is reduced compared with continuous paddy rice cropping …
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