The carbon sequestration efficiency of conservation agriculture is constrained by initial carbon contents and duration: Evidence from a meta-analysis of experimental data in China

IF 5.4 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2025-04-19 DOI:10.1016/j.catena.2025.109058

Ling Shi , Jianlin Zhao , Siying Xiao , Chaoying Zhao , Yiwen Wang

{"title":"The carbon sequestration efficiency of conservation agriculture is constrained by initial carbon contents and duration: Evidence from a meta-analysis of experimental data in China","authors":"Ling Shi , Jianlin Zhao , Siying Xiao , Chaoying Zhao , Yiwen Wang","doi":"10.1016/j.catena.2025.109058","DOIUrl":null,"url":null,"abstract":"<div><div>Conservation agriculture (CA) represents a crucial strategy for enhancing soil organic carbon (SOC) and mitigating climate change. Nevertheless, a comprehensive and quantitative assessment of the effectiveness and controlling factors of SOC sequestration induced by CA measures in China remains lacking. Our study compiled an extensive dataset on the SOC changes induced by CA measures in China, derived from literature reviews, encompassing 469 experimental data points spanning the period from 1978 to 2020. Using this dataset and <em>meta</em>-analysis, we quantitatively assessed changes in the SOC content of China’s topsoil (0–20 cm) and identified controlling factors under various CA measures. Overall, our results indicated that CA measures significantly increased SOC by 29.88 ± 6.44 % (<em>p</em> < 0.001) compared to the conventional tillage (CK). The highest SOC change rate (SCR) occurred with no-tillage (NT) combined with chemical fertilizer and straw return measure (NT + CF + S). Additionally, NT with chemical fertilizers (NT + CF), chemical fertilizers with manure (CF + M), and manure (M) measures exhibited SCR values exceeding 40 %. It is noteworthy that the application of CF + S (21.49 ± 3.28 %) or CF + M (54.07 ± 4.76 %) led to greater SOC sequestration compared to the application of CF alone (12.95 ± 2.11 %). Furthermore, the annual SOC change rate (ASCR) of CA measures is closely linked to the experimental duration of its application, demonstrating an overall exponential decline followed by stabilization after several years (<em>R<sup>2</sup></em> = 0.79, <em>p</em> < 0.05). Meanwhile, the initial SOC content was significantly negatively correlated with SCR (<em>R<sup>2</sup></em> = 0.66, <em>p</em> < 0.05). After implementing CA measures, paddy soils with higher initial SOC levels exhibited a smaller increase in SOC compared to black loessial soils with lower initial SOC levels. Our study contributes to the understanding of how CA sequesters carbon in soil, which is crucial for selecting appropriate agricultural measures according to local conditions to minimize soil carbon emissions and improve soil carbon sequestration capacity.</div></div>","PeriodicalId":9801,"journal":{"name":"Catena","volume":"255 ","pages":"Article 109058"},"PeriodicalIF":5.4000,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catena","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0341816225003601","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Conservation agriculture (CA) represents a crucial strategy for enhancing soil organic carbon (SOC) and mitigating climate change. Nevertheless, a comprehensive and quantitative assessment of the effectiveness and controlling factors of SOC sequestration induced by CA measures in China remains lacking. Our study compiled an extensive dataset on the SOC changes induced by CA measures in China, derived from literature reviews, encompassing 469 experimental data points spanning the period from 1978 to 2020. Using this dataset and meta-analysis, we quantitatively assessed changes in the SOC content of China’s topsoil (0–20 cm) and identified controlling factors under various CA measures. Overall, our results indicated that CA measures significantly increased SOC by 29.88 ± 6.44 % (p < 0.001) compared to the conventional tillage (CK). The highest SOC change rate (SCR) occurred with no-tillage (NT) combined with chemical fertilizer and straw return measure (NT + CF + S). Additionally, NT with chemical fertilizers (NT + CF), chemical fertilizers with manure (CF + M), and manure (M) measures exhibited SCR values exceeding 40 %. It is noteworthy that the application of CF + S (21.49 ± 3.28 %) or CF + M (54.07 ± 4.76 %) led to greater SOC sequestration compared to the application of CF alone (12.95 ± 2.11 %). Furthermore, the annual SOC change rate (ASCR) of CA measures is closely linked to the experimental duration of its application, demonstrating an overall exponential decline followed by stabilization after several years (R² = 0.79, p < 0.05). Meanwhile, the initial SOC content was significantly negatively correlated with SCR (R² = 0.66, p < 0.05). After implementing CA measures, paddy soils with higher initial SOC levels exhibited a smaller increase in SOC compared to black loessial soils with lower initial SOC levels. Our study contributes to the understanding of how CA sequesters carbon in soil, which is crucial for selecting appropriate agricultural measures according to local conditions to minimize soil carbon emissions and improve soil carbon sequestration capacity.

Abstract Image

查看原文本刊更多论文

保护性农业的固碳效率受初始碳含量和持续时间的制约：来自中国试验数据荟萃分析的证据

保护性耕作（CA）是增加土壤有机碳（SOC）和减缓气候变化的重要战略。然而，中国仍缺乏对保护性耕作措施诱导土壤有机碳固存的有效性和控制因素的全面定量评估。我们的研究从文献综述中收集了大量有关中国 CA 措施诱导的 SOC 变化的数据集，其中包括 469 个实验数据点，时间跨度从 1978 年到 2020 年。利用该数据集和元分析，我们定量评估了中国表层土壤（0-20 厘米）SOC 含量的变化，并确定了各种 CA 措施的控制因素。总体而言，我们的研究结果表明，与传统耕作（CK）相比，CA 措施显著增加了 29.88 ± 6.44 % 的 SOC（p < 0.001）。免耕（NT）结合化肥和秸秆还田措施（NT + CF + S）的 SOC 变化率（SCR）最高。此外，免耕加化肥（NT + CF）、化肥加粪肥（CF + M）和粪肥（M）措施的 SCR 值也超过了 40%。值得注意的是，与单独施用化肥（12.95 ± 2.11 %）相比，施用化肥 + S（21.49 ± 3.28 %）或化肥 + M（54.07 ± 4.76 %）可提高 SOC 固存率。此外，CA 措施的 SOC 年变化率（ASCR）与试验施用时间密切相关，总体呈指数下降趋势，数年后趋于稳定（R2 = 0.79，p < 0.05）。同时，初始 SOC 含量与 SCR 呈显著负相关（R2 = 0.66，p <0.05）。与初始 SOC 含量较低的黑壤土相比，实施 CA 措施后，初始 SOC 含量较高的水稻土的 SOC 增幅较小。我们的研究有助于了解 CA 如何固碳，这对因地制宜地选择适当的农业措施以减少土壤碳排放和提高土壤固碳能力至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.