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Management‐induced changes in soil organic carbon and related crop yield dynamics in China's cropland.
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- Author(s): Lin, Bai‐Jian1,2 (AUTHOR); Li, Ruo‐Chen1,2 (AUTHOR); Liu, Ke‐Chun1,2 (AUTHOR); Pelumi Oladele, Olatunde1,2 (AUTHOR); Xu, Zhi‐Yu3 (AUTHOR); Lal, Rattan4 (AUTHOR); Zhao, Xin1,2 (AUTHOR) ; Zhang, Hai‐Lin1,2 (AUTHOR)
- Source:
Global Change Biology. Jul2023, Vol. 29 Issue 13, p3575-3590. 16p.- Subject Terms:
- Source:
- Additional Information
- Subject Terms:
- Abstract: Enhancing soil organic carbon (SOC) sequestration and food supply are vital for human survival when facing climate change. Site‐specific best management practices (BMPs) are being promoted for adoption globally as solutions. However, how SOC and crop yield are related to each other in responding to BMPs remains unknown. Here, path analysis based on meta‐analysis and machine learning was conducted to identify the effects and potential mechanisms of how the relationship between SOC and crop yield responds to site‐specific BMPs in China. The results showed that BMPs could significantly enhance SOC and maintain or increase crop yield. The maximum benefits in SOC (30.6%) and crop yield (79.8%) occurred in mineral fertilizer combined with organic inputs (MOF). Specifically, the optimal SOC and crop yield would be achieved when the areas were arid, soil pH was ≥7.3, initial SOC content was ≤10 g kg−1, duration was >10 years, and the nitrogen (N) input level was 100–200 kg ha−1. Further analysis revealed that the original SOC level and crop yield change showed an inverted V‐shaped structure. The association between the changes in SOC and crop yield might be linked to the positive role of the nutrient‐mediated effect. The results generally suggested that improving the SOC can strongly support better crop performance. Limitations in increasing crop yield still exist due to low original SOC level, and in regions where the excessive N inputs, inappropriate tillage or organic input is inadequate and could be diminished by optimizing BMPs in harmony with site‐specific conditions. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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