干旱区生态环境知识资源中心(Arid): CO_2浓度增加对半干旱区春小麦生产和水分利用效率的影响

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	CO_2浓度增加对半干旱区春小麦生产和水分利用效率的影响
其他题名	Effects of elevated CO_2 concentration on production and water use efficiency of spring wheat in semi-arid area
	张凯 1; 王润元 2; 李巧珍 3; 王鹤龄 2; 赵鸿 2; 阳伏林 2; 赵福年 2; 齐月 2
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2018
卷号	29 期号:9 页码:2959-2969
中文摘要	为了解CO_2浓度升高条件下春小麦生产和水分利用效率(WUE)的响应特征,在典型半干旱区定西,利用开顶式气室(OTC)试验平台开展了CO_2浓度增加模拟试验.试验设对照(390 mumol·mol~(-1))、480 mumol·mol~(-1)和570 mumol·mol~(-1) 3个CO_2浓度.结果表明:CO_2浓度升高使春小麦冠层空气温度小幅上升,10 cm深处的土壤环境温度下降;CO_2浓度增加对春小麦各器官生物量和总生物量都有明显促进作用,在480和570 mumol·mol~(-1)浓度下,地上干物质量平均增长20.6%和41.5%,总干物质量平均增长19.3%和39.6%.生物量增加主要是由茎叶干物质量增加所致,与生育中期物质生产能力明显增强有关;在两种CO_2浓度处理下,植株根冠比分别降低7.3%和11.8%,CO_2浓度增加对春小麦地上部分干物质积累的贡献大于地下部分;CO_2浓度升高主要通过影响穗粒数来影响最终产量,在480和570 mumol·mol~(-1)浓度下,小麦产量分别增加了8.9%和19.9%;大气CO_2浓度升高对春小麦光合作用影响的长期效应不明显,随CO_2浓度升高,光合速率显著提高,蒸腾速率降低,蒸发蒸腾量减小.随CO_2浓度升高,叶片、群体和产量3个水平的WUE都增加,其中群体水平的WUE增幅最大,产量水平的WUE增幅最小.
英文摘要	In the present study,the response of spring wheat production and water use efficiency(WUE) to the elevated CO_2 concentrations was investigated based on the open-top chamber (OTC) experiment platform in Dingxi,a typical semi-arid area.Three different CO_2 concentrations (390 mumol·mol~(-1),480 mumol·mol~(-1)and 570 mumol·mol~(-1)) were involved.The results showed that the air temperature above plant canopy increased and the soil temperature at depth of 10 cm decreased by elevated CO_2.The increased CO_2 concentration substantially enhanced the total and each component biomass.The aboveground dry mass under the increased CO_2 concentrations (480 and 570 mumol·mol~(-1)) was increased by 20.6% and 41.5%,respectively,and the total dry mass was increased by 19.3% and 39.6%,respectively.The biomass enhacement was mainly due to the increases of dry mass of stems and leaves,which was strongly related to the material production capacity during the middle growth stage.The root/shoot ratio under the increased CO_2 concentrations (480 and 570 mumol·mol~(-1)) was decreased by 7.3% and 11.8%,respectively,indicating that the elevated CO_2 affected the dry matter accumulation of aboveground more than that of belowground.The yields of spring wheat under the increased CO_2 concentrations (480 and 570 mumol·mol~(-1)) were higher than that of the control by 8.9% and 19.9%,respectively,mainly due to the increase of grains per spike.The long-term effect of elevated CO_2 concentration on the photosynthesis of spring wheat was not obvious.The photosynthetic rate significantly increased,the transpiration rate decreased and the evapotranspiration reduced with the increases of CO_2 concentration.WUE at the leaf,population,and yield levels increased under elevated CO_2 concentration,with the increase range of WUE being the largest at the population level and the lowest at the yield level.
中文关键词	CO_2浓度增加 ; 春小麦 ; 生产 ; 水分利用效率 ; 半干旱区
英文关键词	elevated CO_2 concentration spring wheat production water use efficiency semi-arid area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6329578
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238582
作者单位	1.中国气象局兰州干旱气象研究所;;中国气象局定西干旱气象与生态环境野外试验基地, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室;;, 兰州;;定西, ;;甘肃 730020;;743000; 2.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 3.甘肃省定西市气象局, 定西, 甘肃 743000, 中国
推荐引用方式 GB/T 7714	张凯,王润元,李巧珍,等. CO_2浓度增加对半干旱区春小麦生产和水分利用效率的影响[J]. 中国气象局兰州干旱气象研究所,2018,29(9):2959-2969.
APA	张凯.,王润元.,李巧珍.,王鹤龄.,赵鸿.,...&齐月.(2018).CO_2浓度增加对半干旱区春小麦生产和水分利用效率的影响.应用生态学报,29(9),2959-2969.
MLA	张凯,et al."CO_2浓度增加对半干旱区春小麦生产和水分利用效率的影响".应用生态学报 29.9(2018):2959-2969.