globalchange  > 气候变化与战略
DOI: 10.1029/2017GB005849
论文题名:
Integrative Crop-Soil-Management Modeling to Assess Global Phosphorus Losses from Major Crop Cultivations
作者: Liu W.; Yang H.; Ciais P.; Stamm C.; Zhao X.; Williams J.R.; Abbaspour K.C.; Schulin R.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2018
卷: 32, 期:7
语种: 英语
英文关键词: agricultural land ; agricultural modeling ; assessment method ; crop residue ; crop yield ; cultivation ; fertilizer application ; integrated approach ; modeling ; policy making ; soil erosion ; soil-vegetation interaction ; China ; India ; Triticum aestivum ; Zea mays
学科: crop yields ; global modeling ; integrative assessment ; mitigation ; PEPIC ; phosphorus losses
中文摘要: Fertilization, crop uptake followed by plant harvest, runoff and erosion, and transformations of phosphorus (P) in soil are the major factors influencing the P balance of croplands. It is important to integrate plant-soil-management interactions into consistent modeling systems to determine the effect of P fertilization conditions on yields and to quantify P losses. Previous assessment of P losses on large scales did not consider the interactions among these factors. Here we applied a grid-based crop model to estimate global P losses from three most produced crops: maize, rice, and wheat. The model was forced by detailed P input data sets over the period 1998–2002. According to our simulations, global P losses from the three crops reached 1.2 Tg P/year, and about 44% of it was due to soil erosion. The global total P losses were dominated by contributions from a few hot spot regions. Reducing P fertilizer in regions experiencing excessive P uses and hence losses, especially in China and India, could achieve the same yields as today and save about two thirds of global total P inputs, with the cobenefits of declining global total P losses by 41% and downstream water quality improvement. Reducing soil erosion and retaining more crop residues on croplands could further save P inputs and alleviate P losses. This study is of significance to determine the major factors influencing P balance across regions of the world and help policy makers to propose efficient strategies for tackling P-driven environmental problems. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160217
Appears in Collections:气候变化与战略

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作者单位: Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, China; Department of Environmental Sciences, MGU, University of Basel, Basel, Switzerland; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, China; Texas A&M Agri-Life Research and Extension Center, Weslaco, TX, United States; Institute of Terrestrial Ecosystems, ETH Zürich, Zürich, Switzerland

Recommended Citation:
Liu W.,Yang H.,Ciais P.,et al. Integrative Crop-Soil-Management Modeling to Assess Global Phosphorus Losses from Major Crop Cultivations[J]. Global Biogeochemical Cycles,2018-01-01,32(7)
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