Organic amendment effects on cropland soil organic carbon and its implications: A global synthesis
Organic amendment effects on cropland soil organic carbon and its implications: A global synthesis
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有机改良剂对农田土壤有机碳的影响及其影响：全球综合
DOI：
10.1016/j.catena.2023.107343
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发表时间：
2023
期刊：
影响因子：
6.2
通讯作者：
Ren, Wei
中科院分区：
文献类型：
--
作者：
Bai, Xiongxiong;Tang, Jiao;Wang, Wei;Ma, Jianmin;Shi, Jian;Ren, Wei
增加土壤有机碳含量可以促进土壤健康和作物产量。施用有机改良剂是促进农田土壤固碳的常用措施。不同有机添加剂的影响（例如，堆肥，泥浆）对SOC的影响不确定。以前的研究已经调查了SOC对环境因素的响应，但没有很好地解决有机改良剂特性的影响（例如，来源、液体/固体形式、pH）。基于424篇文献的1,972个比较，我们采用荟萃分析方法探讨有机改良剂对SOC含量的影响及其影响因素。结果表明，有机改良剂的添加使SOC平均增加了26.9%（或5.1 Mg C ha-1）。具体而言，有机改良剂可以在长期（>20年）或1.0米深度内提高SOC。有机残留物的投入增加更多的SOC在干旱气候，碱性土壤，或没有无机氮施用土壤比潮湿的气候地区，酸性土壤，施氮土壤，分别。污泥和城市生活垃圾作为有机改良剂导致土壤有机碳含量较高，有机改良剂的pH值和液固形态对土壤有机碳积累有显著影响。碳含量相对较低或氮含量丰富的改良剂具有增加SOC储存的巨大潜力。我们的研究结果说明了修正特性的重要性，估计潜在的有机修正剂除了土壤碳积累。这项研究强调，改良剂的应用可能是一个可持续的战略，以增加土壤碳储量，同时促进有机废物的利用。
Increasing soil organic carbon (SOC) content can promote soil health and crop yield. Organic amendment application is a common practice to accelerate soil carbon sequestration in cropland. The effects of different organic amendments (e.g., compost, slurry) on SOC are uncertain. Previous studies have investigated SOC response to environmental factors but not well addressed the effect of organic amendment characteristics (e.g., source, liquid/solid form, pH). Depending on 1,972 comparisons from 424 articles, we undertook a meta-analysis approach to explore organic amendment effects on SOC content and the related influence factors. The results show that organic amendment addition increased SOC by an average of 26.9% (or 5.1 Mg C ha−1). Specifically, organic amendments can enhance SOC over the long term (>20 years) or within 1.0 m depth. Organic-residue inputs increased more SOC in regions with an arid climate, alkaline soils, or no-mineral nitrogen application soils than the humid climate regions, acidic soils, and nitrogen application soils, respectively. Sewage sludge and municipal solid waste as organic amendments led to high SOC. The organic amendments' pH and liquid/solid form caused significant differences in SOC accumulation. Amendments with a relatively low carbon content or rich nitrogen content have great potential to increase SOC storage. Our results illustrate the importance of amendment characteristics when estimating the potential of organic amendment addition to soil carbon accumulation. This study highlights that amendment application might be a sustainable strategy to increase soil carbon storage while promoting organic waste utilization.