不同土壤水分条件下不同耐旱性小麦品种光合性能的比较研究

STUDIES ON PHOTOSYNTHESIS CAPACITY UNDER DIFFERENT WATER CONDITION IN DIFFERENT DROUGHT ENDURING WHEAT VARIETY

在不同土壤水分条件下对不同耐旱性小麦品种光合性能的比较研究表明，群体光合速率和旗叶光合速率一般以耐旱品种莱农８８３４为高，不耐旱品种鲁麦７号为低，但在土壤水分充足条件下两品种差异较小，在土壤水分亏缺条件下差异尤为显著。从群体光合速率和旗叶光合速率受水分的响应看，耐旱品种莱农８８３４受水分胁迫光合速率降低的幅度小于不耐旱品种鲁麦７号。莱农８８３４的群体光合速率和旗叶光合速率高与其在水分亏缺条件下能保持较高的叶面积系数和叶绿素含量有关。从产量性状分析，莱农８８３４适宜在供水有限的条件下发挥其耐旱特性，提高产量；而鲁麦７号可在供水充足条件下发挥其高产潜力。

The studies on photosynthesis capacity under different water condition in different drought enduring wheat variety have been studied. The result shows: the mass and flag leaf photosynthesis rate of drought enduring Lainong 8834 is higher than that non-drought enduring Lumai No.7 in the condition of water stress, but there are less difference between them in water supplying throughly. The decreasing range of the mass and flag leaf photosynthesis rate of drought enduring Lainong 8834 less than that of non-drought enduring Lumai No.7 in the condition of water stress. The reason that the mass and flag leaf photosynthesis rate of Lainong 8834 is high in the condition of water stress is that Lainong 8834 can keep higher leaf area index and chlorophyll content . From Yield factor analyzing , Lainong 8834 can develop drought enduring capacity in the Condition of water stress and gain high yield, however Lumai No 7 can develop its high yield potentiality in water supplying thoughly.