Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture

Wenjuan Sun, Josep G. Canadell, Lijun Yu, Lingfei Yu, Wen Zhang, Pete Smith, Tony Fischer, Yao Huang (Corresponding Author)

Research output: Contribution to journalArticle

Abstract

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 with 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.
Original languageEnglish
JournalGlobal Change Biology
Publication statusAccepted/In press - 24 Dec 2019

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soil carbon
crop yield
carbon sequestration
Agriculture
Crops
Conservation
Carbon
agriculture
Soils
climate
soil
Arid regions
cold region
arid region
regional climate
tillage
carbon
loss

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Sun, W., Canadell, J. G., Yu, L., Yu, L., Zhang, W., Smith, P., ... Huang, Y. (Accepted/In press). Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture. Global Change Biology.

Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture. / Sun, Wenjuan; Canadell, Josep G.; Yu, Lijun; Yu, Lingfei; Zhang, Wen; Smith, Pete; Fischer, Tony; Huang, Yao (Corresponding Author).

In: Global Change Biology, 24.12.2019.

Research output: Contribution to journalArticle

Sun, Wenjuan ; Canadell, Josep G. ; Yu, Lijun ; Yu, Lingfei ; Zhang, Wen ; Smith, Pete ; Fischer, Tony ; Huang, Yao. / Climate drives global soil carbon sequestration and crop yield changes under conservation agriculture. In: Global Change Biology. 2019.
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abstract = "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 with 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.",
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