气候变化领域集成服务门户(CCPortal): Can multi-strategy management stabilize nitrate leaching under increasing rainfall?

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DOI	10.1088/1748-9326/ab5ca8
	Can multi-strategy management stabilize nitrate leaching under increasing rainfall?
	Martinez-Feria R.; Nichols V.; Basso B.; Archontoulis S.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	The increased spring rainfall intensity and amounts observed recently in the US Midwest poses additional risk of nitrate (NO3) leaching from cropland, and contamination of surface and subsurface freshwater bodies. Several individual strategies can reduce NO3 loading to freshwater ecosystems (i.e. optimize N fertilizer applications, planting cover crops, retention of active cycling N), but the potential for synergistic interactions among N management practices has not been fully examined. We applied portfolio effect (PE) theory, a concept originally developed for financial asset management, to test whether implementing multiple N management practices simultaneously produces more stable NO3 leaching mitigation outcomes than what would be predicted from implementing each practice independently. We analyzed simulated data generated using a validated process-based cropping system model (APSIM) that covers a range of soils, weather conditions, and management practices. Results indicated that individual management practices alone explained little of the variation in drainage NO3 loads but were more influential in the amount of residual soil NO3 at crop harvest. Despite this, we observed a general stabilizing effect from adopting well-designed multi-strategy approaches for both NO3 loads and soil NO3 at harvest, which became more pronounced in years with high spring rainfall. We use the PE principle to design multi-strategy management to reduce and stabilize NO3 leaching, which resulted in 9.6% greater yields, 15% less NO3 load, and 61% less soil NO3 at harvest than the baseline typical management. Our results make the case for applying the PE to adapt NO3 leaching mitigation to increased climate variability and change, and guide policy action and on-the-ground implementation. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Agricultural management; Apsim; Climate change adaption; Crop production; Nitrate leaching
语种	英语
scopus关键词	Climate change; Crops; Cultivation; Harvesting; Leaching; Nitrates; Rain; Soils; Water; Agricultural management; Apsim; Climate variability and change; Crop production; Freshwater ecosystem; Management practices; Nitrate leaching; Synergistic interaction; Information management; adaptive management; agricultural management; agricultural modeling; climate change; crop production; cropping practice; fertilizer application; leaching; nitrate; precipitation intensity; rainfall; residual soil; Midwest; United States
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/154237
作者单位	Department of Earth and Environmental Science, Michigan State University, East Lansing, MI, United States; Department of Agronomy, Iowa State University, Ames, IA, United States
推荐引用方式 GB/T 7714	Martinez-Feria R.,Nichols V.,Basso B.,et al. Can multi-strategy management stabilize nitrate leaching under increasing rainfall?[J],2019,14(12).
APA	Martinez-Feria R.,Nichols V.,Basso B.,&Archontoulis S..(2019).Can multi-strategy management stabilize nitrate leaching under increasing rainfall?.Environmental Research Letters,14(12).
MLA	Martinez-Feria R.,et al."Can multi-strategy management stabilize nitrate leaching under increasing rainfall?".Environmental Research Letters 14.12(2019).