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首页> 外文会议>International Conference on Environmental Science and Technology >(cest2017_00423) Impact of elevated CO2 concentration on growth and water use efficiency of spring wheat under free-air conditions at semi-arid rain-fed area of northwest China
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(cest2017_00423) Impact of elevated CO2 concentration on growth and water use efficiency of spring wheat under free-air conditions at semi-arid rain-fed area of northwest China

机译：（CEST2017_00423）CO2浓度升高对西北半干旱雨灌区的自由空气条件下春小麦生长和用水效率的影响

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Spring wheat (Triticum aestivum L. 'New Dingxi24') was grown at ambient (370 μl l?1) and elevated(620 μl l?1) concentrations of CO2 in a mini free-air CO2enrichment (FACE) facility to study the impact of CO2enrichment on growth, yield, and water use efficiency(WUE) in a semi-arid area in northwest China. The resultsshowed that at the elevated CO2 concentration the plantheight (20.1%), leaf area index (18.8%), average number ofgrains in a spike (22.5%), and thousand-kernel weight(17.2%) were higher than that of ambient CO2concentration(CK), whereas the proportion of sterile spikeswas 41.5% lower in the CO2-enriched plots. The periodfrom sowing to harvesting was 5 days longer (within whichthe filling-milking stage was significantly longer) in theCO2-enriched plots. Consequently, the yield (15.4%) andwater use efficiency (WUE) (15.4%) was significantlyhigher in the CO2-enriched plots. Overall, the resultssuggest that the higher yield was mainly attributable to thegreater average number of grains in a spike and higherthousand-kernel weight. Moreover, the improved WUEhelped to counteract the negative effects of moisture stress.
机译：春小麦（Triticum aestivum L.'drem dingxi24'）在环境温度（370μl1→1）上生长，并在迷你自由空气Co2年级（面）设施中升高（620μl1→1）CO 2浓度，以研究撞击中国西北半干旱地区生长，产量和水利用效率（WUE）的同学。在升高的CO 2浓度下，植物肺部（20.1％），叶面积指数（18.8％），穗状花序（22.5％）和千核重量（17.2％）的平均数量高于环境CO2浓度（CK），而CO 2富集的厚度的无菌尖峰的比例降低了41.5％。播种以收获的时间为5天，在富含富集的地块中较长（在其中填充填充阶段明显更长）。因此，在CO 2富集的地块中，产率（15.4％）和水使用效率（WUE）（15.4％）显着高。总体而言，较高产量的结果主要归因于钉子和更高的粒子中的人民的平均谷物数量。此外，改进的WUEHELWED以抵消水分胁迫的负面影响。

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