globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12567
论文题名:
Simultaneous improvement in productivity, water use, and albedo through crop structural modification
作者: Drewry D.T.; Kumar P.; Long S.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:6
起始页码: 1955
结束页码: 1967
语种: 英语
英文关键词: Agriculture ; Albedo ; Carbon uptake ; Climate change ; Crop breeding ; Crop ideotype ; Evapotranspiration ; Plant optimization ; Sustainability ; Water use efficiency
Scopus关键词: agricultural land ; albedo ; canopy ; climate change ; climate conditions ; crop plant ; crop production ; cultivar ; evapotranspiration ; leaf area ; monoculture ; optimization ; photosynthesis ; shortwave radiation ; survival ; sustainability ; vertical profile ; water use efficiency ; Corn Belt ; United States ; Glycine max ; Zea mays ; water ; biophysics ; breeding ; climate change ; crop ; genetic selection ; genetics ; growth, development and aging ; metabolism ; physiology ; plant leaf ; sunlight ; theoretical model ; Biophysical Phenomena ; Breeding ; Climate Change ; Crops, Agricultural ; Models, Theoretical ; Plant Leaves ; Selection, Genetic ; Sunlight ; Water
英文摘要: Spanning 15% of the global ice-free terrestrial surface, agricultural lands provide an immense and near-term opportunity to address climate change, food, and water security challenges. Through the computationally informed breeding of canopy structural traits away from those of modern cultivars, we show that solutions exist that increase productivity and water use efficiency, while increasing land-surface reflectivity to offset greenhouse gas warming. Plants have evolved to maximize capture of radiation in the upper leaves, thus shading competitors. While important for survival in the wild, this is suboptimal in monoculture crop fields for maximizing productivity and other biogeophysical services. Crop progenitors evolved over the last 25 million years in an atmosphere with less than half the [CO2] projected for 2050. By altering leaf photosynthetic rates, rising [CO2] and temperature may also alter the optimal canopy form. Here using soybean, the world's most important protein crop, as an example we show by applying optimization routines to a micrometeorological leaf canopy model linked to a steady-state model of photosynthesis, that significant gains in production, water use, and reflectivity are possible with no additional demand on resources. By modifying total canopy leaf area, its vertical profile and angular distribution, and shortwave radiation reflectivity, all traits available in most major crop germplasm collections, increases in productivity (7%) are possible with no change in water use or albedo. Alternatively, improvements in water use (13%) or albedo (34%) can likewise be made with no loss of productivity, under Corn Belt climate conditions. © 2014 California Institute of Technology. Government sponsorship acknowledged.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62220
Appears in Collections:影响、适应和脆弱性

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作者单位: Climate Physics Group, Jet Propulsion Laboratory, California Institute of Technology, m/s 233-300, Pasadena, CA, 91109-8099, United States; Joint Institute for Regional Earth System Science and Engineering, University of California Los Angeles, 607 Charles E Young Drive East, Young Hall, Room 4242, Los Angeles, CA, 90095-7228, United States; Department of Civil and Environmental Engineering, University of Illinois, 2527B Hydrosystems Laboratory, 301 North Mathews Avenue, Urbana, IL, 61801-2352, United States; Department of Atmospheric Sciences, University of Illinois, 150 South Gregory Street, Urbana, IL, 61801-3070, United States; Department of Crop Sciences, University of Illinois, AW-101 Turner Hall, 1102 South Goodwin Avenue, Urbana, IL 61801, United States; Department of Plant Biology, University of Illinois, 265 Morrill Hall, 505 South Goodwin Avenue, Urbana, IL, 61801, United States

Recommended Citation:
Drewry D.T.,Kumar P.,Long S.P.. Simultaneous improvement in productivity, water use, and albedo through crop structural modification[J]. Global Change Biology,2014-01-01,20(6)
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