Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15796 |
Can cropland management practices lower net greenhouse emissions without compromising yield? | |
Ziyin Shang; Mohamed Abdalla; Longlong Xia; Feng Zhou; Wenjuan Sun; Pete Smith | |
2021-07-20 | |
发表期刊 | Global Change Biology
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出版年 | 2021 |
英文摘要 | Smart cropland management practices can mitigate greenhouse gas (GHG) emissions while safeguarding food security. However, the integrated effects on net greenhouse gas budget (NGHGB) and grain yield from different management practices remain poorly defined and vary with environmental and application conditions. Here, we conducted a global meta-analysis on 347 observation sets of non-CO2 GHG (CH4 and N2O) emissions and grain yield, and 412 observations of soil organic carbon sequestration rate (SOCSR). Our results show that for paddy rice, replacing synthetic nitrogen at the rate of 30%–59% with organic fertilizer significantly decreased net GHG emissions (NGHGB: −15.3 ± 3.4 [standard error], SOCSR: −15.8 ± 3.8, non-CO2 GHGs: 0.6 ± 0.1 in Mg CO2 eq ha−1 year−1) and improved rice yield (0.4 ± 0.1 in Mg ha−1 year−1). In contrast, intermittent irrigation significantly increased net GHG emissions by 11.2 ± 3.1 and decreased rice yield by 0.4 ± 0.1. The reduction in SOC sequestration by intermittent irrigation (15.5 ± 3.3), which was most severe (>20) in alkaline soils (pH > 7.5), completely offset the mitigation in CH4 emissions. Straw return for paddy rice also led to a net increase in GHG emissions (NGHGB: 4.8 ± 1.4) in silt-loam soils, where CH4 emissions (6.3 ± 1.3) were greatly stimulated. For upland cropping systems, mostly by enhancing SOC sequestration, straw return (NGHGB: −3.4 ± 0.8, yield: −0.5 ± 0.6) and no-tillage (NGHGB: −2.9 ± 0.7, yield: −0.1 ± 0.3) were more effective in warm climates. This study highlights the importance of carefully managing croplands to sequester SOC without sacrifice in yield while limiting CH4 emissions from rice paddies. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333820 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Ziyin Shang,Mohamed Abdalla,Longlong Xia,et al. Can cropland management practices lower net greenhouse emissions without compromising yield?[J]. Global Change Biology,2021. |
APA | Ziyin Shang,Mohamed Abdalla,Longlong Xia,Feng Zhou,Wenjuan Sun,&Pete Smith.(2021).Can cropland management practices lower net greenhouse emissions without compromising yield?.Global Change Biology. |
MLA | Ziyin Shang,et al."Can cropland management practices lower net greenhouse emissions without compromising yield?".Global Change Biology (2021). |
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