Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture.,Global Change Biology

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Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture.
Global Change Biology ( IF 10.8 ) Pub Date : 2020-02-08 , DOI: 10.1111/gcb.15001
Wenjuan Sun ₁ , Josep G Canadell ₂ , Lijun Yu ₃ , Lingfei Yu ₁ , Wen Zhang ₃ , Pete Smith ₄ , Tony Fischer ₅ , Yao Huang _{1,

6}

Affiliation

Conservation agriculture has been shown to have multiple benefits for soils, crop yield and the environment, and consequently, no-till, the central practice of conservation agriculture, has rapidly expanded. However, studies show that the potential for carbon (C) sequestration in no-till farming sometimes is not realized, let alone the ability to maintain or improve crop yield. Here we present a global analysis of no-till-induced changes of soil C and crop yield based on 260 and 1,970 paired studies; respectively. We show that, relative to local conventional tillage, arid regions can benefit the most from conservation agriculture by achieving a win-win outcome of enhanced C sequestration and increased crop yield. However, more humid regions are more likely to increase SOC only, while some colder regions have yield losses and soil C loss as likely as soil C gains. In addition to site-specific characteristics and management, a careful assessment of the regional climate is needed to determine the potential benefits of adopting conservation agriculture.

中文翻译：

气候保护农业推动了全球土壤碳固存和作物产量的变化。

事实证明，保护性农业对土壤，作物产量和环境都有多重好处，因此，免耕法是保护性农业的主要实践，已迅速扩大。但是，研究表明，有时无法实现免耕农业中碳（C）隔离的潜力，更不用说保持或提高作物产量的能力了。在这里，我们基于260和1,970个配对研究对免耕引起的土壤C和作物产量的变化进行了全球分析。分别。我们表明，相对于当地的传统耕作，干旱地区可以通过实现提高固碳和增加农作物产量的双赢结果，从保护性农业中获得最大利益。但是，更多的潮湿地区更有可能仅增加SOC，而一些较冷的地区则与土壤C的增加一样具有产量损失和土壤C损失的可能性。除了特定地点的特征和管理之外，还需要仔细评估区域气候，以确定采用保护性农业的潜在利益。

更新日期：2020-01-17

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