气候变化领域集成服务门户(CCPortal): Benchmarking irrigation water use in producer fields in the US central Great Plains

CCPortal

DOI	10.1088/1748-9326/ab17eb
	Benchmarking irrigation water use in producer fields in the US central Great Plains
	Gibson K.E.B.; Gibson J.P.; Grassini P.
发表日期	2019
ISSN	17489318
卷号	14 期号:5
英文摘要	Efficient use of freshwater resources is necessary to balance food production and long-term sustainability of irrigated agricultural systems. Here we developed a framework to benchmark irrigation water use relative to crop yield for individual fields based on site-specific weather and soil. Subsequently, we used the framework to diagnose on-farm irrigation management, in relation to crop production, in maize and soybean producer fields in Nebraska (USA). We found actual irrigation to be similar to estimated irrigation water requirement in about half of the fields (i.e. small water surplus). Remarkably, these fields attained yields similar to fields where actual irrigation exceeded water requirements (i.e. large water surplus). Underlying causes for water surplus included producer risk aversion in soils with low water storage capacity, use of coarse methods for scheduling irrigation, and tillage. Scenario assessment indicated that total irrigation volume could potentially be reduced up to 25%-40%, without hurting crop yields, by reducing current irrigation surplus in years with above- or near-average seasonal precipitation. About a third of the producer fields already achieved high yields with little water surplus, supporting the contention that achieving high productivity with less irrigation by better matching irrigation amounts in relation with crop water requirements are compatible goals. The proposed framework can be applied to other crops and regions provided there are well-validated models, local soil and weather datasets, and reliable field-level irrigation, yield, and management records. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	benchmarking; crop system; crop yield; irrigation
语种	英语
scopus关键词	Benchmarking; Crops; Cultivation; Soils; Water supply; Central Great Plains; Crop water requirements; Crop yield; Fresh water resources; Irrigation water requirements; Long-term sustainability; Seasonal precipitations; Site-specific weather; Irrigation; agricultural management; benchmarking; crop yield; food production; irrigation system; precipitation (climatology); soybean; sustainability; water use; Great Plains; Nebraska; United States; Glycine max; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154588
作者单位	Department of Agronomy and Horticulture, University of Nebraska, Lincoln, United States; School of Natural Resources, University of Nebraska, Lincoln, United States; Robert B. Daugherty Water for Food Global Institute, University of Nebraska, United States
推荐引用方式 GB/T 7714	Gibson K.E.B.,Gibson J.P.,Grassini P.. Benchmarking irrigation water use in producer fields in the US central Great Plains[J],2019,14(5).
APA	Gibson K.E.B.,Gibson J.P.,&Grassini P..(2019).Benchmarking irrigation water use in producer fields in the US central Great Plains.Environmental Research Letters,14(5).
MLA	Gibson K.E.B.,et al."Benchmarking irrigation water use in producer fields in the US central Great Plains".Environmental Research Letters 14.5(2019).