Статья

Sustainable irrigation based on co-regulation of soil water supply and atmospheric evaporative demand

Jingwen ZhangAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USA. [email protected]Kaiyu GuanAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USA. [email protected]Bin PengAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USA. [email protected]Ming PanCenter for Western Weather and Water Extremes, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USAWang ZhouAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USAChongya JiangAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USAHyungsuk KimmAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USATrenton E. FranzSchool of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, USAR. F. GrantDepartment of Renewable Resources, University of Alberta, Edmonton, Alberta, CanadaYi YangAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana Champaign, Urbana, IL, USADaran R. RudnickDepartment of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USADerek M. HeerenDepartment of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USAAndrew E. SuykerSchool of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, USAWilliam L. BauerleDepartment of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO, USAGrace L. MinerSoil Management and Sugarbeet Research Unit, USDA-ARS, Fort Collins, CO, USA

2021en

ABI

Аннотация

Irrigation is an important adaptation to reduce crop yield loss due to water stress from both soil water deficit (low soil moisture) and atmospheric aridity (high vapor pressure deficit, VPD). Traditionally, irrigation has primarily focused on soil water deficit. Observational evidence demonstrates that stomatal conductance is co-regulated by soil moisture and VPD from water supply and demand aspects. Here we use a validated hydraulically-driven ecosystem model to reproduce the co-regulation pattern. Specifically, we propose a plant-centric irrigation scheme considering water supply-demand dynamics (SDD), and compare it with soil-moisture-based irrigation scheme (management allowable depletion, MAD) for continuous maize cropping systems in Nebraska, United States. We find that, under current climate conditions, the plant-centric SDD irrigation scheme combining soil moisture and VPD, could significantly reduce irrigation water use (-24.0%) while maintaining crop yields, and increase economic profits (+11.2%) and irrigation water productivity (+25.2%) compared with MAD, thus SDD could significantly improve water sustainability.

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Идентификаторы

DOI: 10.1038/s41467-021-25254-7

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar