Arid
DOI10.1016/j.agwat.2010.06.007
Effects of elevated CO2 concentration on growth and water use efficiency of winter wheat under two soil water regimes
Qiao, Yunzhou1,2; Zhang, Huizhen3; Dong, Baodi1,2; Shi, Changhai1,2; Li, Yuxin1,2; Zhai, Hongmei1,2,4; Liu, Mengyu1,2
通讯作者Liu, Mengyu
来源期刊AGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
出版年2010
卷号97期号:11页码:1742-1748
英文摘要

Winter wheat (Triticum aestivum L. cv. Kenong9204) was grown in open top chambers with either ambient or elevated CO2 concentrations (358 +/- 19 mu mol mol(-1) or 712 +/- 22 mu mol mol(-1), respectively) in well-watered or drought conditions. Although elevated CO2 did not significantly affect the height of the plants at harvest, it significantly increased the aboveground biomass by 10.1% and the root/shoot ratio by 16.0%. Elevated CO2 also significantly increased the grain yield (GY) by 6.7% when well-watered and by 10.4% when drought stressed. Specifically, in the well-watered condition, this increase was due to a greater number of ears (8.7% more) and kernels (8.6). In the drought condition, it was only due to a greater number of spikes (17.1% more). In addition, elevated CO2 also significantly increased the water use efficiency (WUE) of the plants by 9.9% when well-watered and by 13.8% under drought conditions, even though the evapotranspiration (ET) of the plants did not change significantly. Elevated CO2 also significantly increased the root length in the top half of the soil profile by 35.4% when well-watered and by 44.7% under drought conditions. Finally, elevated CO2 significantly increased the root water uptake by 52.9% when well-watered and by 10.1% under drought conditions. These results suggest that (1) future increases in atmospheric CO2 concentration may have a significant effect on wheat production in arid and semiarid areas where wheat cultivation requires upland cropping or deficit irrigation; (2) wheat cultivars can be developed to have more tillers and kernels through selective breeding and field management; and (3) fertilizer and water management in topsoil will become increasingly important as atmospheric CO2 concentration rises. (C) 2010 Elsevier B.V. All rights reserved.


英文关键词Elevated CO2 concentration Grain yield (GY) Water use efficiency (WUE) Root/shoot ratio (RSR) Root distribution Soil water depletion (SWD)
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000281991200004
WOS关键词CARBON-DIOXIDE ; ATMOSPHERIC CO2 ; STOMATAL CONDUCTANCE ; LEAF-AREA ; PLANT-GROWTH ; DRY-MATTER ; YIELD ; ENRICHMENT ; DROUGHT ; PHOTOSYNTHESIS
WOS类目Agronomy ; Water Resources
WOS研究方向Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163070
作者单位1.Chinese Acad Sci, Key Lab Agr Water Resources, Shijiazhuang 050021, Peoples R China;
2.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Hebei Key Lab Agr Water Saving, Shijiazhuang 050021, Peoples R China;
3.Taizhou Univ, Sch Pharmaceut & Chem Engn, Linhai 317000, Zhejiang, Peoples R China;
4.Shijiazhuang Univ, Dept Chem, Shijiazhuang 050021, Peoples R China
推荐引用方式
GB/T 7714
Qiao, Yunzhou,Zhang, Huizhen,Dong, Baodi,et al. Effects of elevated CO2 concentration on growth and water use efficiency of winter wheat under two soil water regimes[J],2010,97(11):1742-1748.
APA Qiao, Yunzhou.,Zhang, Huizhen.,Dong, Baodi.,Shi, Changhai.,Li, Yuxin.,...&Liu, Mengyu.(2010).Effects of elevated CO2 concentration on growth and water use efficiency of winter wheat under two soil water regimes.AGRICULTURAL WATER MANAGEMENT,97(11),1742-1748.
MLA Qiao, Yunzhou,et al."Effects of elevated CO2 concentration on growth and water use efficiency of winter wheat under two soil water regimes".AGRICULTURAL WATER MANAGEMENT 97.11(2010):1742-1748.
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