The Application of Rice Straw with Reduced N Fertilizer Improves the Rice Yield While Decreasing Environmental N Losses in Southern China

文献类型： 外文期刊

第一作者： Liu, Han

作者： Liu, Han;Ma, Tingting;Wan, Li;Chen, Xiaofen;Liu, Jia;Liu, Han;Ma, Tingting;Wan, Li;Chen, Xiaofen;Liu, Jia;Liu, Han;Zhou, Guopeng;Zhu, Anfan

作者机构：

关键词： greenhouse gases; NH3 volatilization; net ecosystem carbon budget; rice yield

期刊名称：SUSTAINABILITY （ 影响因子：3.9； 五年影响因子：4.0 ）

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年卷期： 2024 年 16 卷 7 期

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收录情况： SCI

摘要： To investigate the effects of straw residues with reduced nitrogen (N) fertilizer on greenhouse gas (GHG) and N losses in paddy fields, we conducted a field experiment during two growing seasons in paddy rice systems in southern China to evaluate the impacts of the application of straw residues with reduced N fertilizer on rice yield, GHG emissions, and ammonia (NH3) volatilization. The four treatments included N100 (conventional dose of N fertilizer), SN100 (conventional dose of N fertilizer + straw), N60 (60% of the conventional dose of N fertilizer), and SN60 (60% of the conventional dose of N fertilizer + straw). We found that the yield of the SN60 treatment was slightly reduced, but the partial factor productivity of applied N (PFPN) was significantly increased by 63.9% compared to the N100 treatment. At the same N application rate, the application of straw increased soil organic C (SOC), methane (CH4) emissions, carbon dioxide (CO2) emissions, global warming potential (GWP), greenhouse gas intensity (GHGI), and net ecosystem carbon budget (NECB), but significantly decreased soil N2O emissions and NH3 volatilization. Compared with conventional fertilization (N100), straw residues with reduced N fertilization (SN60) reduced N2O emissions and NH3 volatilization by 42.1% and 23.9%, and increased GHGI and NECB by 11.1% and 18.3%, respectively. The results indicate that straw residues with reduced N fertilizer are a feasible strategy to reduce N losses in paddy fields while increasing carbon sequestration.

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