DOI: 10.1002/2017GB005754
Scopus记录号: 2-s2.0-85041024264
论文题名: Quantifying the Limitation to World Cereal Production Due To Soil Phosphorus Status
作者: Kvakić M ; , Pellerin S ; , Ciais P ; , Achat D ; L ; , Augusto L ; , Denoroy P ; , Gerber J ; S ; , Goll D ; , Mollier A ; , Mueller N ; D ; , Wang X ; , Ringeval B
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2018
卷: 32, 期: 1 起始页码: 143
结束页码: 157
语种: 英语
英文关键词: cropland
; diffusion
; global
; nutrient
; phosphorus
; yield gap
Scopus关键词: agricultural modeling
; cereal
; crop production
; crop yield
; fertilizer
; phosphorus
; quantitative analysis
; spatial distribution
; yield response
; Africa
; Eastern Europe
; South America
; Triticum aestivum
; Zea mays
英文摘要: Phosphorus (P) is an essential element for plant growth. Low P availability in soils is likely to limit crop yields in many parts of the world, but this effect has never been quantified at the global scale by process-based models. Here we attempt to estimate P limitation in three major cereals worldwide for the year 2000 by combining information on soil P distribution in croplands and a generic crop model, while accounting for the nature of soil-plant P transport. As a global average, the diffusion-limited soil P supply meets the crop's P demand corresponding to the climatic yield potential, due to the legacy soil P in highly fertilized areas. However, when focusing on the spatial distribution of P supply versus demand, we found strong limitation in regions like North and South America, Africa, and Eastern Europe. Averaged over grid cells where P supply is lower than demand, the global yield gap due to soil P is estimated at 22, 55, and 26% in winter wheat, maize, and rice. Assuming that a fraction (20%) of the annual P applied in fertilizers is directly available to the plant, the global P yield gap lowers by only 5–10%, underlying the importance of the existing soil P supply in sustaining crop yields. The study offers a base for exploring P limitation in crops worldwide but with certain limitations remaining. These could be better accounted for by describing the agricultural P cycle with a fully coupled and mechanistic soil-crop model. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77679
Appears in Collections: 气候变化事实与影响
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作者单位: ISPA, Bordeaux Sciences Agro, INRA, Villenave d'Ornon, France; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Universite Paris-Saclay, Gif-sur-Yvette, France; Institute on the Environment, University of Minnesota, St. Paul, MN, United States; Department of Earth System Science, University of California, Irvine, CA, United States
Recommended Citation:
Kvakić M,, Pellerin S,, Ciais P,et al. Quantifying the Limitation to World Cereal Production Due To Soil Phosphorus Status[J]. Global Biogeochemical Cycles,2018-01-01,32(1)