Can cropland management practices lower net greenhouse emissions without compromising yield?

doi:10.1111/gcb.15796

	Can cropland management practices lower net greenhouse emissions without compromising yield?
	Shang, Ziyin 1; Abdalla, Mohamed ; Xia, Longlong 2; Zhou, Feng 3; Sun, Wenjuan 4; Smith, Pete
	2021
发表期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
卷号	27 期号:19 页码:4657-4670
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.
关键词	global warming manure substitution net greenhouse gas balance residue retention water saving zero-tillage
学科领域	Biodiversity Conservation ; Ecology ; Environmental Sciences
DOI	10.1111/gcb.15796
收录类别	SCI
语种	英语
WOS关键词	SOIL ORGANIC-CARBON ; WATER MANAGEMENT ; METHANE EMISSION ; NO-TILL ; GAS EMISSIONS ; RICE ; NITROGEN ; PRODUCTIVITY ; PADDY ; RESIDUE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000674857700001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2486
资助机构	Horizon 2020 Framework Programme [774124] ; China Scholarship Council [201706010406]
作者邮箱	ziyin.shang@abdn.ac.uk
作品OA属性	Green Submitted
引用统计	被引频次：63[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26459
专题	植被与环境变化国家重点实验室
作者单位	1.Univ Aberdeen, Inst Biol & Environm Sci, 23 St Machar Dr, Aberdeen AB24 3UU, Scotland 2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China 3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res IMK IFU, Garmisch Partenkirchen, Germany 4.Peking Univ, Sino France Inst Earth Syst Sci, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shang, Ziyin,Abdalla, Mohamed,Xia, Longlong,et al. Can cropland management practices lower net greenhouse emissions without compromising yield?[J]. GLOBAL CHANGE BIOLOGY,2021,27(19):4657-4670.
APA	Shang, Ziyin,Abdalla, Mohamed,Xia, Longlong,Zhou, Feng,Sun, Wenjuan,&Smith, Pete.(2021).Can cropland management practices lower net greenhouse emissions without compromising yield?.GLOBAL CHANGE BIOLOGY,27(19),4657-4670.
MLA	Shang, Ziyin,et al."Can cropland management practices lower net greenhouse emissions without compromising yield?".GLOBAL CHANGE BIOLOGY 27.19(2021):4657-4670.

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