DOI: 10.1111/gcb.13719
论文题名: Point stresses during reproductive stage rather than warming seasonal temperature determine yield in temperate rice
作者: Espe M.B. ; Hill J.E. ; Hijmans R.J. ; McKenzie K. ; Mutters R. ; Espino L.A. ; Leinfelder-Miles M. ; van Kessel C. ; Linquist B.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期: 10 起始页码: 4386
结束页码: 4395
语种: 英语
英文关键词: climate change
; cold sterility
; respiration
; rice
; temperature
; yield potential
英文摘要: Climate change is predicted to shift temperature regimes in most agricultural areas with temperature changes expected to impact yields of most crops, including rice. These temperature-driven effects can be classified into point stresses, where a temperature event during a sensitive stage drives a reduction in yield, or seasonal warming losses, where raised temperature is thought to increase maintenance energy demands and thereby decrease available resources for yield formation. Simultaneous estimation of the magnitude of each temperature effect on yield has not been well documented due to the inherent difficulty in separating their effects. We simultaneously quantified the magnitude of each effect for a temperate rice production system using a large data set covering multiple locations with data collected from 1995 to 2015, combined with a unique probability-based modeling approach. Point stresses, primarily cold stress during the reproductive stages (booting and flowering), were found to have the largest impact on yield (over 3 Mg/ha estimated yield losses). Contrary to previous reports, yield losses caused by increased temperatures, both seasonal and during grain-filling, were found to be small (approximately 1–2% loss per °C). Occurrences of cool temperature events during reproductive stages were found to be persistent over the study period, and within season, the likelihood of a cool temperature event increased when flowering occurred later in the season. Short and medium grain types, typically recommended for cool regions, were found to be more tolerant of cool temperatures but more sensitive to heat compared to long grain cultivars. These results suggest that for temperate rice systems, the occurrence of periodic stress events may currently overshadow the impacts of general warming temperature on crop production. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60782
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Plant Sciences, University of California – Davis, Davis, CA, United States; Department of Environmental Science and Policy, University of California – Davis, Davis, CA, United States; Rice Experiment Station, California Cooperative Rice Research Foundation, Biggs, CA, United States; University of California Cooperative Extension, Oroville, CA, United States; University of California Cooperative Extension, Colusa, CA, United States; University of California Cooperative Extension, Stockton, CA, United States
Recommended Citation:
Espe M.B.,Hill J.E.,Hijmans R.J.,et al. Point stresses during reproductive stage rather than warming seasonal temperature determine yield in temperate rice[J]. Global Change Biology,2017-01-01,23(10)