globalchange  > 气候变化与战略
DOI: 10.1016/j.agwat.2019.105996
论文题名:
Water productivity and footprint of major Brazilian rainfed crops – A spatially explicit analysis of crop management scenarios
作者: Flach R.; Skalský R.; Folberth C.; Balkovič J.; Jantke K.; Schneider U.A.
刊名: Agricultural Water Management
ISSN: 3783774
出版年: 2020
卷: 233
语种: 英语
英文关键词: Crop modeling ; EPIC ; Green Water ; Sustainability ; Water footprint
Scopus关键词: Crops ; Irrigation ; Productivity ; Sustainable development ; Agricultural intensification ; Agricultural productions ; Crop model ; EPIC ; Green water ; Productivity improvements ; Spatially explicit assessments ; Water footprint ; Water resources ; agricultural intensification ; agricultural management ; agricultural production ; biomass ; crop plant ; rainfed agriculture ; sustainability ; water demand ; water footprint ; water use ; Brazil ; Glycine max ; Gossypium hirsutum ; Triticum aestivum ; Zea mays
英文摘要: Green water is a central resource for global agricultural production. Understanding its role is fundamental to design strategies to increase global food and feed production while avoiding further land conversion, and obtaining more crop per drop. Brazil is a country with high water availability, and a major exporter of agricultural goods and virtual water. We assess here water use and water productivity in Brazil for four major rainfed crops: cotton, maize, soybeans, and wheat. For this, we use the EPIC crop model to perform a spatially explicit assessment of consumptive water use and water productivity under crop management scenarios in Brazil between 1990 and 2013. We investigate four different land-water interactions: (i) water use and productivity for different management scenarios, (ii) the potential of supplemental irrigation for productivity improvement, (iii) changes in green water use throughout the study period, and finally (iv) potential reduction of land and water demand related to agricultural intensification. The results show that, for the studied crops, green water is the main resource for biomass production, and intensification can lead to great improvements in green water productivity. The results also suggest that, despite achieving higher yields, irrigation-based intensification tends to lower overall water productivity, compared to fertilizer-based intensification strategies. This is, however, regionally and crop-specific. Furthermore, due to higher yields and water productivity, producing the same amount of crop output in irrigated or rainfed intensification scenarios would result in the reduction of resource demand, in the order of 34–58 % for cropland, and 29–52 % for water. © 2020 The Authors
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158347
Appears in Collections:气候变化与战略

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作者单位: Research Unit Sustainability and Global Change, Universität Hamburg, Grindelberg 5, Hamburg, 20144, Germany; International Max Planck Research School on Earth System Modelling (IMPRS-ESM), Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, 20146, Germany; International Institute for Applied Systems Analysis, Ecosystem Services and Management Program, Schlossplatz 1, Laxenburg, A-2361, Austria; National Agricultural and Food Centre, Soil Science and Conservation Research Institute, Trenčianska 55, Bratislava, 824 80, Slovakia; Department of Soil Science, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Bratislava, 842 15, Slovakia; Center for Earth System Research and Sustainability (CEN), Universität Hamburg, Bundesstr. 53, Hamburg, 20146, Germany

Recommended Citation:
Flach R.,Skalský R.,Folberth C.,et al. Water productivity and footprint of major Brazilian rainfed crops – A spatially explicit analysis of crop management scenarios[J]. Agricultural Water Management,2020-01-01,233
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