GSTDTAP  > 气候变化
DOI10.1111/gcb.13637
Long-term no-till and stover retention each decrease the global warming potential of irrigated continuous corn
Jin, Virginia L.1; Schmer, Marty R.1; Stewart, Catherine E.2; Sindelar, Aaron J.1,3; Varvel, Gary E.1; Wienhold, Brian J.1
2017-07-01
发表期刊GLOBAL CHANGE BIOLOGY
ISSN1354-1013
EISSN1365-2486
出版年2017
卷号23期号:7
文章类型Article
语种英语
国家USA
英文摘要

Over the last 50 years, the most increase in cultivated land area globally has been due to a doubling of irrigated land. Long-term agronomic management impacts on soil organic carbon (SOC) stocks, soil greenhouse gas (GHG) emissions, and global warming potential (GWP) in irrigated systems, however, remain relatively unknown. Here, residue and tillage management effects were quantified by measuring soil nitrous oxide (N2O) and methane (CH4) fluxes and SOC changes (Delta SOC) at a long-term, irrigated continuous corn (Zea mays L.) system in eastern Nebraska, United States. Management treatments began in 2002, and measured treatments included no or high stover removal (0 or 6.8 Mg DM ha(-1) yr(-1), respectively) under no-till (NT) or conventional disk tillage (CT) with full irrigation (n = 4). Soil N2O and CH4 fluxes were measured for five crop-years (2011-2015), and Delta SOC was determined on an equivalent mass basis to similar to 30 cm soil depth. Both area-and yield-scaled soil N2O emissions were greater with stover retention compared to removal and for CT compared to NT, with no interaction between stover and tillage practices. Methane comprised <1% of total emissions, with NT being CH4 neutral and CT a CH4 source. Surface SOC decreased with stover removal and with CT after 14 years of management. When Delta SOC, soil GHG emissions, and agronomic energy usage were used to calculate system GWP, all management systems were net GHG sources. Conservation practices (NT, stover retention) each decreased system GWP compared to conventional practices (CT, stover removal), but pairing conservation practices conferred no additional mitigation benefit. Although cropping system, management equipment/timing/history, soil type, location, weather, and the depth to which Delta SOC is measured affect the GWP outcomes of irrigated systems at large, this long-term irrigated study provides valuable empirical evidence of how management decisions can impact soil GHG emissions and surface SOC stocks.


英文关键词conventional tillage global warming potential greenhouse gas intensity methane nitrous oxide no-till soil organic carbon stover removal
领域气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000402514900025
WOS关键词NITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS EMISSIONS ; SOIL ORGANIC-CARBON ; CROP-ROTATION ; N2O EMISSIONS ; RESIDUE REMOVAL ; MANAGEMENT ; MAIZE ; FERTILIZER ; SEQUESTRATION
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
引用统计
被引频次:51[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/17648
专题气候变化
资源环境科学
作者单位1.Univ Nebraska, USDA ARS, Agroecosyst Management Res, 251 Filley Hall, Lincoln, NE 68583 USA;
2.USDA ARS, Soil Management & Sugarbeet Res, Suite 320,2150 Ctr Ave,Bldg D, Ft Collins, CO 80526 USA;
3.Monsanto Co, 10975 NW 121st Pl, Malcolm, NE 68402 USA
推荐引用方式
GB/T 7714
Jin, Virginia L.,Schmer, Marty R.,Stewart, Catherine E.,et al. Long-term no-till and stover retention each decrease the global warming potential of irrigated continuous corn[J]. GLOBAL CHANGE BIOLOGY,2017,23(7).
APA Jin, Virginia L.,Schmer, Marty R.,Stewart, Catherine E.,Sindelar, Aaron J.,Varvel, Gary E.,&Wienhold, Brian J..(2017).Long-term no-till and stover retention each decrease the global warming potential of irrigated continuous corn.GLOBAL CHANGE BIOLOGY,23(7).
MLA Jin, Virginia L.,et al."Long-term no-till and stover retention each decrease the global warming potential of irrigated continuous corn".GLOBAL CHANGE BIOLOGY 23.7(2017).
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