安徽农业科学2011，Vol.39Issue(1)：111-113,3.
不同产量水平大豆叶片气体交换特性的比较
Comparison of Gases Exchange Characteristic in Leaves of Soybean Cultivars at Different Yield Levels
摘要
Abstract
[ Objective ] The aim was to explore the gases exchange characteristic in leaves of soybean cultivars at different yield levels to provide a certain theories basis for high yield breeding and cultivation of soybean cultivars. [ Method ] Nine soybean cultivars divided into three yield levels were planted under the same environmental condition. At V4 (seedling), R2 (blooming), R4 (pod-bearing), R6 (pod-filling) and R,(maturing) growth stages,the net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) in soybean leaves were measured with Li-6400 portable photosynthesis system. [ Result] At all growth stages, the net photosynthetic rate, stomatal conductance in leaves of high yield soybean cultivars were significantly higher than iow yield soybean cultivars. At V4, R2 and R4 stages,transpiration rate in leaves of high yield soybean cultivars was significantly higher than low yield soybean cultivars; there was no significant difference on transpiration rate in leaves of soybean cultivars at different yield levels at R6 and R7 stage. At V4 and R2 stage, water use efficiency (WUE) in leaves of soybean cultivars at different yield showed a trend of low yield cultivars > middle yield cultivars > high yield cultivars, while it appeared high yield cultivars > middle yield cultivars > low yield cultivars at R4, R6 and R7 stage. [ Conclusion] The gases exchange capacity in leaves of high yield soybean cultivars was significantly higher than low yield soybean cultivars, which had provided physiological basis of high yield. The net photosynthetic rate could be used as an selection index of high yield soybean.关键词
大豆/光合速率/气孔导度/蒸腾速率/水分利用效率Key words
Soybean/ Net photosynthetic rate/ Stomatal conductance/ Transpiration rate/ Water use efficiency分类
农业科技引用本文复制引用
郑殿君,张治安,姜丽艳,王元利,李大勇..不同产量水平大豆叶片气体交换特性的比较[J].安徽农业科学,2011,39(1):111-113,3.基金项目
国家自然科学基金项目(30871547) （30871547）
吉林省教育厅资助项目(2006041). （2006041）
