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Reducing carbon and nitrogen loss by shortening the composting duration based on seed germination index (SCD@GI): Feasibilities and challenges

文献类型： 外文期刊

作者： Xiao, Ran 1 ; Li, Lan 1 ; Zhang, Yanye 1 ; Fang, Linfa 1 ; Li, Ronghua 3 ; Song, Dan 5 ; Liang, Tao 6 ; Su, Xiaoxuan 1 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Chongqing 400715, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Low carbon Green Agr Southwestern China, Chongqing 400715, Peoples R China

3.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Northwestern China, Yangling 712100, Shaanxi, Peoples R China

5.Chongqing Acad Ecol & Environm Sci, Chongqing 401147, Peoples R China

6.Chongqing Acad Agr Sci, Chongqing 401329, Peoples R China

关键词： Sustainable agriculture; Carbon and nitrogen loss control; Composting; Seed germination; Meta-analysis

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 933 卷

页码：

收录情况： SCI

摘要： Addressing carbon (C) and nitrogen (N) losses through composting has emerged as a critical environmental challenge recently, and how to mitigate these losses has been a hot topic across the world. As the emissions of carbonaceous and nitrogenous gases were closely correlated with the composting process, the feasibility of composting duration shortening on C and N loss needs to be explored. Therefore, the goal of this paper is to find evidence-based approaches to reduce composting duration, utilizing the seed germination index as a metric (SCD@GI), for assessing its efficiency on C and N loss reductions as well as compost quality. Our findings reveal that the terminal seed germination index (GI) frequently surpassed the necessary benchmarks, with a significant portion of trials achieving the necessary GI within 60 % of the standard duration. Notably, an SCD@GI of 80 % resulted in a reduction of CO 2 and NH 3 by 21.4 % and 21.9 %, respectively, surpassing the effectiveness of the majority of current mitigation strategies. Furthermore, compost quality, maturity specifically, remained substantially unaffected at a GI of 80 %, with the composting process maintaining adequate thermophilic conditions to ensure hygienic quality and maturity. This study also highlighted the need for further studies, including the establishment of uniform GI testing standards and comprehensive life cycle analyses for integrated composting and land application practices. The insights gained from this study would offer new avenues for enhancing C and N retention during composting, contributing to the advancement of high -quality compost production within the framework of sustainable agriculture.

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