干旱区生态环境知识资源中心(Arid): Landscape-scale cropping changes in the High Plains: economic and environmental implications

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DOI	10.1088/1748-9326/ab5e8b
	Landscape-scale cropping changes in the High Plains: economic and environmental implications
	Rosenzweig, Steven T.; Schipanski, Meagan E.
通讯作者	Rosenzweig, ST (corresponding author), Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA. ; Rosenzweig, ST (corresponding author), Gen Mills, 9000 Plymouth Ave N, Golden Valley, MN 55427 USA.
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2019
卷号	14 期号:12
英文摘要	A global transformation in semi-arid cropping systems is occurring as dryland (non-irrigated) farmers in semi-arid regions shift from crop rotations reliant on year-long bare fallows, called summer fallow, to more intensively cropped systems. Understanding the rate of cropping system intensification at the landscape scale is critical to estimating the economic and environmental implications of this movement. Here, we use high-resolution satellite data to quantify dryland cropping patterns from 2008 to 2016 in the US High Plains. We use these estimates to scale up our previous field-level research in this region on soil carbon, herbicide use, yields, and profitability. Over the nine year study period, the High Plains witnessed a profound shift in cropping systems, as the historically dominant wheat-fallow system was replaced by more intensified rotations as the dominant systems by land area. Out of the 4 million hectares of non-irrigated cropland in the study area, this shift coincided with a 0.5 million-hectare decline in summer fallow and a concurrent increase in alternative (non-wheat) crops. We estimate that, from 2008 to 2016, these patterns resulted in a 0.53 Tg (9%) increase in annual grain production, 80 million USD (10%) increase in annual net farm operating income, substantial reductions in herbicide use, and an increase in C sequestration that corresponds to greenhouse gas reductions of 0.32 million metric tons of CO2 equivalents per year (MMTCO(2)e yr(-1)). We project each of these implications to a scenario of potential maximum 100% intensification and estimate that, relative to 2016 levels, herbicide use would be reduced by more than half, grain production would increase by 25%, net operating income would increase by 223 million USD (26%), and greenhouse gases would be reduced by an additional 0.8MMTCO(2)e yr(-1). The scale of cropping intensification in the High Plains and its environmental and economic impacts has important implications for other regions undergoing similar transformations, and for policy that can either support or hinder these shifts toward more sustainable cropping systems.
英文关键词	cropping system intensification dryland agriculture satellite imagery carbon sequestration net farm operating income herbicide use
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000514833700005
WOS关键词	ECOLOGICAL APPROACH ; PRECIPITATION USE ; SOIL CARBON ; NO-TILL ; DRYLAND ; MANAGEMENT ; NITROGEN ; IMPACTS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369759
作者单位	[Rosenzweig, Steven T.; Schipanski, Meagan E.] Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA; [Rosenzweig, Steven T.] Gen Mills, 9000 Plymouth Ave N, Golden Valley, MN 55427 USA
推荐引用方式 GB/T 7714	Rosenzweig, Steven T.,Schipanski, Meagan E.. Landscape-scale cropping changes in the High Plains: economic and environmental implications[J]. Colorado State University,2019,14(12).
APA	Rosenzweig, Steven T.,&Schipanski, Meagan E..(2019).Landscape-scale cropping changes in the High Plains: economic and environmental implications.ENVIRONMENTAL RESEARCH LETTERS,14(12).
MLA	Rosenzweig, Steven T.,et al."Landscape-scale cropping changes in the High Plains: economic and environmental implications".ENVIRONMENTAL RESEARCH LETTERS 14.12(2019).