数字农科院2.0

Green manure and rice straw recycling: A triple-win for productivity, environmental sustainability and net ecosystem economic benefit

文献类型： 外文期刊

作者： Daba, Nano Alemu;Huang, Jing;Alam, Md Ashraful;Gilbert, Ntagisanimana;Tadesse, Kiya Adare;Ahmed, Imtiaz;Abdelaziz, Mahmoud;Li, Jiwen;Kebede, Erana;Legesse, Tsegaye Gemechu;Liu, Shujun;Liu, Lisheng;Zhang, Huimin

作者机构：

关键词： Carbon footprint;Energy use efficiency;Functional gene;Greenhouse gas;Yields

期刊名称： JOURNAL OF ENVIRONMENTAL MANAGEMENT

ISSN： 0301-4797

年卷期： 2025 年 397 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Green manure and rice straw recycling is widely practiced in paddy soils of southern China to enhance soil fertility and crop productivity; however, its environmental consequences remain lacking. Here, we used a longterm field experiment to quantify greenhouse gas (GHG) emissions and associated microbial functional genes, energy-use efficiency, carbon footprint, and net ecosystem economic benefit to assess the sustainability implications of this practice. The treatments consisted of conventional chemical fertilizers (CK), CK + green manure recycling (M), CK + early-season rice straw recycling (ERS), CK + ERS + late-season rice straw recycling (DRS), CK + ERS + M (ERSM) and CK + DRS + M (DRSM). Compared with ERS, DRS and DRSM, the ERSM significantly reduced the annual cumulative methane (CH4) emissions by 24.3 %, 33.9 % and 22.1 %, respectively. Similarly, ERSM significantly reduced nitrous oxide (N2O) emissions by 18.5 %-34.2 % compared to the other treatments, except for DRS. However, compared with all the other treatments, the ERSM treatment increased annual grain yield by 6.0 %-67.6 %, energy-use efficiency by 6.8 %-68 %, and net ecosystem economic benefit by 10.9 %- 112.1 %. Optimizing carbon-to-nitrogen ratio lowers direct GHG emissions through balancing CH4-related gene activity (mcrA and pmoA) and by promoting ammonia-oxidizing genes (amoA), which in turn reduced carbon footprint. Soil organic carbon storage and CH4 via direct-GHG emissions and chemical nitrogen via indirect-GHG emissions were the major contributors to carbon footprint. In conclusion, ERSM is an effective strategy to promote sustainable rice production in rice-rice cropping systems and it has the potential to support carbon neutrality efforts.

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