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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
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).