全球智库信息集成服务系统(G2TT): Crop response to elevated CO2 and world food supply. A comment on "Food for Thought..." by Long et al.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1016/j.eja.2006.10.002
	Crop response to elevated CO2 and world food supply. A comment on "Food for Thought..." by Long et al.
	Tubiello FN; Amthor JS; Boote KJ; Donatelli M; Easterling W; Fischer G; Gifford RM; Howden SM
发表日期	2006
出处	European Journal of Agronomy 26 (3): 215-223
出版年	2006
语种	英语
摘要	Recent conclusions that new free-air carbon dioxide enrichment (FACE) data show a much lower crop yield response to elevated CO2 than thought previously - casting serious doubts on estimates of world food supply in the 21st century - are found to be incorrect, being based in part on technical inconsistencies and lacking statistical significance. First, we show that the magnitude of crop response to elevated CO2 is rather similar across FACE and non-FACE data-sets, as already indicated by several previous comprehensive experimental and modeling analyses, with some differences related to which "ambient" CO2 concentration is used for comparisons. Second, we find that results from most crop model simulations are consistent with the values from FACE experiments. Third, we argue that lower crop responses to elevated CO2 of the magnitudes in question would not significantly alter projections of world food supply. We conclude by highlighting the importance of a better understanding of crop response to elevated CO2 under a variety of experimental and modeling settings, and suggest steps necessary to avoid confusion in future meta-analyses and comparisons of experimental and model data.
主题	Modeling Land-Use and Land-Cover Changes (LUC)
关键词	CO2 crop response FACE Chambers Experimental and model data Climate change World food supply
URL	http://pure.iiasa.ac.at/id/eprint/7862/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/128542
推荐引用方式 GB/T 7714	Tubiello FN,Amthor JS,Boote KJ,et al. Crop response to elevated CO2 and world food supply. A comment on "Food for Thought..." by Long et al.. 2006.