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DOI | 10.1088/1748-9326/ab22db |
Sensitivity of grain yields to historical climate variability in India | |
Davis K.F.; Chhatre A.; Rao N.D.; Singh D.; Defries R. | |
发表日期 | 2019 |
ISSN | 17489318 |
卷号 | 14期号:6 |
英文摘要 | Fluctuations in temperature and precipitation influence crop productivity across the planet. With episodes of extreme climate becoming increasingly frequent, buffering crop production against these stresses is a critical aspect of climate adaptation. In India, where grain production and diets are closely linked, national food supply is sensitive to the effect of climate variability on monsoon grain production. Here we quantitatively examine the historical (1966-2011) relationship between interannual variations in temperature and rainfall and rainfed yield variability for five monsoon crops - rice and four alternative grains (finger millet, maize, pearl millet, and sorghum). Compared to rice, we find that alternative grains are significantly less sensitive to climate variation and generally experience smaller declines in yield under climate extremes. However, maximizing harvested area allocations to coarse grains (i.e. holding maize production constant) reduced grain production by 12.0 Mtonnes (-17.2%) under drought conditions and 12.8 Mtonnes (-18.0%) during non-drought years (non-drought). Increasing the harvested area allocated to all alternative grains (i.e. including maize) can enhance production by +39.6% (drought) and by +37.0% (non-drought). These alternative grains therefore offer promise for reducing variations in Indian grain production in response to climate shocks, but avoiding grain production shortfalls from increased alternative grains will require yield improvements that do not compromise their superior climate resilience. © 2019 The Author(s). Published by IOP Publishing Ltd. |
英文关键词 | Climate variability; coarse grains; crop production; India; monsoon; rice; yield variation |
语种 | 英语 |
scopus关键词 | Atmospheric thermodynamics; Climatology; Crops; Cultivation; Drought; Food supply; Climate variability; Coarse grains; Crop production; India; monsoon; rice; yield variation; Grain (agricultural product); Eleusine coracana; Pennisetum glaucum; Zea mays |
来源期刊 | Environmental Research Letters
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/154549 |
作者单位 | Department of Geography, University of Delaware, Newark, DE 19716, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States; Data Science Institute, Columbia University, New York, NY 10025, United States; Indian School of Business, Hyderabad, India; School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, United States; International Institute for Applied Systems Analysis, Laxenburg, Austria; School of the Environment, Washington State University, Vancouver, WA 99164, United States; Department of Ecology Evolution and Environmental Biology, Columbia University, New York, NY 10027, United States |
推荐引用方式 GB/T 7714 | Davis K.F.,Chhatre A.,Rao N.D.,et al. Sensitivity of grain yields to historical climate variability in India[J],2019,14(6). |
APA | Davis K.F.,Chhatre A.,Rao N.D.,Singh D.,&Defries R..(2019).Sensitivity of grain yields to historical climate variability in India.Environmental Research Letters,14(6). |
MLA | Davis K.F.,et al."Sensitivity of grain yields to historical climate variability in India".Environmental Research Letters 14.6(2019). |
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