DOI: 10.1111/gcb.13128
论文题名: Rice grain yield and quality responses to free-air CO2 enrichment combined with soil and water warming
作者: Usui Y. ; Sakai H. ; Tokida T. ; Nakamura H. ; Nakagawa H. ; Hasegawa T.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 3 起始页码: 1256
结束页码: 1270
语种: 英语
英文关键词: Chalky grain
; Free-air CO2 enrichment
; Grain quality
; Heat dose
; Oryza sativa
; Protein content
; Soil and water warming
Scopus关键词: Oryza sativa
; carbon dioxide
; water
; biomass
; growth, development and aging
; heat
; Japan
; metabolism
; Oryza
; season
; weather
; Biomass
; Carbon Dioxide
; Hot Temperature
; Japan
; Oryza
; Seasons
; Water
; Weather
英文摘要: Rising air temperatures are projected to reduce rice yield and quality, whereas increasing atmospheric CO2 concentrations ([CO2]) can increase grain yield. For irrigated rice, ponded water is an important temperature environment, but few open-field evaluations are available on the combined effects of temperature and [CO2], which limits our ability to predict future rice production. We conducted free-air CO2 enrichment and soil and water warming experiments, for three growing seasons to determine the yield and quality response to elevated [CO2] (+200 μmol mol-1, E-[CO2]) and soil and water temperatures (+2 °C, E-T). E-[CO2] significantly increased biomass and grain yield by approximately 14% averaged over 3 years, mainly because of increased panicle and spikelet density. E-T significantly increased biomass but had no significant effect on the grain yield. E-T decreased days from transplanting to heading by approximately 1%, but days to the maximum tiller number (MTN) stage were reduced by approximately 8%, which limited the panicle density and therefore sink capacity. On the other hand, E-[CO2] increased days to the MTN stage by approximately 4%, leading to a greater number of tillers. Grain appearance quality was decreased by both treatments, but E-[CO2] showed a much larger effect than did E-T. The significant decrease in undamaged grains (UDG) by E-[CO2] was mainly the result of an increased percentage of white-base grains (WBSG), which were negatively correlated with grain protein content. A significant decrease in grain protein content by E-[CO2] accounted in part for the increased WBSG. The dependence of WBSG on grain protein content, however, was different among years; the slope and intercept of the relationship were positively correlated with a heat dose above 26 °C. Year-to-year variation in the response of grain appearance quality demonstrated that E-[CO2] and rising air temperatures synergistically reduce grain appearance quality of rice. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61474
Appears in Collections: 影响、适应和脆弱性
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作者单位: Agro-Meteorology Division, National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki, Japan; Taiyo Keiki Co. Ltd., 1-12-3 Nakajujo, Kitaku, Tokyo, Japan; NARO, National Agricultural Research Center, 3-1-1 Kannondai, Tsukuba, Ibaraki, Japan
Recommended Citation:
Usui Y.,Sakai H.,Tokida T.,et al. Rice grain yield and quality responses to free-air CO2 enrichment combined with soil and water warming[J]. Global Change Biology,2016-01-01,22(3)