DOI: 10.1111/gcb.13009
论文题名: High night temperatures during grain number determination reduce wheat and barley grain yield: A field study
作者: García G.A. ; Dreccer M.F. ; Miralles D.J. ; Serrago R.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 11 起始页码: 4153
结束页码: 4164
语种: 英语
英文关键词: Climate change
; Crop development
; Crop growth
; Grain number
; Hordeum vulgare L.
; Minimum temperature
; Triticum aestivum L.
Scopus关键词: barley
; climate change
; crop yield
; temperature effect
; wheat
; Hordeum
; Hordeum vulgare subsp. vulgare
; Triticum aestivum
; Argentina
; circadian rhythm
; climate change
; crop
; food grain
; growth, development and aging
; heat
; Hordeum
; season
; wheat
; Argentina
; Circadian Rhythm
; Climate Change
; Crops, Agricultural
; Edible Grain
; Hordeum
; Hot Temperature
; Seasons
; Triticum
英文摘要: Warm nights are a widespread predicted feature of climate change. This study investigated the impact of high night temperatures during the critical period for grain yield determination in wheat and barley crops under field conditions, assessing the effects on development, growth and partitioning crop-level processes driving grain number per unit area (GN). Experiments combined: (i) two contrasting radiation and temperature environments: late sowing in 2011 and early sowing in 2013, (ii) two well-adapted crops with similar phenology: bread wheat and two-row malting barley and (iii) two temperature regimes: ambient and high night temperatures. The night temperature increase (ca. 3.9 °C in both crops and growing seasons) was achieved using purpose-built heating chambers placed on the crop at 19:000 hours and removed at 7:00 hours every day from the third detectable stem node to 10 days post-flowering. Across growing seasons and crops, the average minimum temperature during the critical period ranged from 11.2 to 17.2 °C. Wheat and barley grain yield were similarly reduced under warm nights (ca. 7% °C-1), due to GN reductions (ca. 6% °C-1) linked to a lower number of spikes per m2. An accelerated development under high night temperatures led to a shorter critical period duration, reducing solar radiation capture with negative consequences for biomass production, GN and therefore, grain yield. The information generated could be used as a starting point to design management and/or breeding strategies to improve crop adaptation facing climate change. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61885
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Cátedra de Cerealicultura, Departamento de Producción Vegetal, Facultad de Agronomía, Universidad de Buenos Aires and CONICET, Av. San Martin 4453, Buenos Aires, Argentina; IFEVA-CONICET, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martin 4453, Buenos Aires, Argentina; CSIRO Plant Industry, Cooper Laboratory, University of Queensland, PO Box 863, Gatton, QLD, Australia
Recommended Citation:
García G.A.,Dreccer M.F.,Miralles D.J.,et al. High night temperatures during grain number determination reduce wheat and barley grain yield: A field study[J]. Global Change Biology,2015-01-01,21(11)