Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aa5371 |
Satellite detection of rising maize yield heterogeneity in the US Midwest | |
Lobell, David B.1; Azzari, George | |
2017 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The future trajectory of crop yields in the United States will influence food supply and land use worldwide. We examine maize and soybean yields for 2000-2015 in the Midwestern U.S. using a new satellite-based dataset on crop yields at 30m resolution. We quantify heterogeneity both within and between fields, and find that the difference between average and top yielding fields is typically below 30% for both maize and soybean, as expected in advanced agricultural regions. In most counties, within-field heterogeneity is at least half as large as overall heterogeneity, illustrating the importance of non-management factors such as soil and landscape position. Surprisingly, we find that yield heterogeneity is rising in maize, both between and within fields, with average yield differences between the best and worst soils more than doubling since 2000. Heterogeneity trends were insignificant for soybean. The findings are consistent both with recent adoption of precision agriculture technologies and with recent trends toward denser sowing in maize, which disproportionately raise yields on better soils. The results imply that yield gains in the region are increasingly derived from the more productive land, and that sub-field precision management of nutrients and other inputs is increasingly warranted. |
英文关键词 | remote sensing crops yield gaps |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394131100003 |
WOS关键词 | GAPS ; SENSITIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
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/15100 |
专题 | 气候变化 |
作者单位 | 1.Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA; 2.Stanford Univ, Ctr Food Secur & Environm, Stanford, CA 94305 USA |
推荐引用方式 GB/T 7714 | Lobell, David B.,Azzari, George. Satellite detection of rising maize yield heterogeneity in the US Midwest[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(1). |
APA | Lobell, David B.,&Azzari, George.(2017).Satellite detection of rising maize yield heterogeneity in the US Midwest.ENVIRONMENTAL RESEARCH LETTERS,12(1). |
MLA | Lobell, David B.,et al."Satellite detection of rising maize yield heterogeneity in the US Midwest".ENVIRONMENTAL RESEARCH LETTERS 12.1(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论