DOI: 10.1111/gcb.13101
论文题名: How efficiently do corn- and soybean-based cropping systems use water? A systems modeling analysis
作者: Dietzel R. ; Liebman M. ; Ewing R. ; Helmers M. ; Horton R. ; Jarchow M. ; Archontoulis S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 2 起始页码: 666
结束页码: 681
语种: 英语
英文关键词: Agricultural production systems simulator
; Biomass production
; Drainage
; Environment
; Soil water
; Water use efficiency
Scopus关键词: Glycine max
; Zea mays
; soil
; water
; agriculture
; biomass
; chemistry
; drought
; flooding
; growth, development and aging
; maize
; procedures
; season
; soil
; soybean
; theoretical model
; United States
; Agriculture
; Biomass
; Droughts
; Floods
; Midwestern United States
; Models, Theoretical
; Seasons
; Soil
; Soybeans
; Water
; Zea mays
英文摘要: Agricultural systems are being challenged to decrease water use and increase production while climate becomes more variable and the world's population grows. Low water use efficiency is traditionally characterized by high water use relative to low grain production and usually occurs under dry conditions. However, when a cropping system fails to take advantage of available water during wet conditions, this is also an inefficiency and is often detrimental to the environment. Here, we provide a systems-level definition of water use efficiency (sWUE) that addresses both production and environmental quality goals through incorporating all major system water losses (evapotranspiration, drainage, and runoff). We extensively calibrated and tested the Agricultural Production Systems sIMulator (APSIM) using 6 years of continuous crop and soil measurements in corn- and soybean-based cropping systems in central Iowa, USA. We then used the model to determine water use, loss, and grain production in each system and calculated sWUE in years that experienced drought, flood, or historically average precipitation. Systems water use efficiency was found to be greatest during years with average precipitation. Simulation analysis using 28 years of historical precipitation data, plus the same dataset with ± 15% variation in daily precipitation, showed that in this region, 430 mm of seasonal (planting to harvesting) rainfall resulted in the optimum sWUE for corn, and 317 mm for soybean. Above these precipitation levels, the corn and soybean yields did not increase further, but the water loss from the system via runoff and drainage increased substantially, leading to a high likelihood of soil, nutrient, and pesticide movement from the field to waterways. As the Midwestern United States is predicted to experience more frequent drought and flood, inefficiency of cropping systems water use will also increase. This work provides a framework to concurrently evaluate production and environmental performance of cropping systems. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61504
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Agronomy, Iowa State University, Ames, IA, United States; Agricultural and Biosystems Engineering Department, Iowa State University, Ames, IA, United States; Department of Biology, University of South Dakota, Ames, IA, United States
Recommended Citation:
Dietzel R.,Liebman M.,Ewing R.,et al. How efficiently do corn- and soybean-based cropping systems use water? A systems modeling analysis[J]. Global Change Biology,2016-01-01,22(2)