不同土壤水分处理下冬小麦生理要素变化分析

Study on Physiological Element Variation of Winter Wheat in Different Soil Moisture Treatment

对不同土壤水分条件处理下冬小麦各生理要素的变化特征分析发现,在灌浆高峰阶段,随着土壤水分的增加,冬小麦的光合速率显著加快,平均值在土壤水分含量偏大处理下较土壤水分含量小处理下高5.91μmol.m-2.s-1,气孔传导速率高0.1591 g.mmo1.m-2.s-1,叶片蒸腾速率高0.0034 g.m-2.h-1,叶片温度偏低0.95℃,胞间二氧化碳浓度高44.5 mg.cm-3,气孔阻力偏低2.419 s.cm-1。小麦灌浆期间,充足的土壤水分保证可以有效延长叶片的生理功能,提高小麦产量。

With the study on physiological element variation of winter wheat in different soil moisture treatment, the results show with the increasing of soil moisture, the photosynthesis rate is increasing strikingly, with the plenty water supply, the average photosynthesis is 5.91 μmol. m^-2. s^-1 higher, the stomas transmit rate is 0. 1591 g. mmol. m^-2 . s^-1 higher, the transpiration rate is 0. 0034 g. higher, the lamina temperature is 0.95 ℃ lower, the concentration of carbon dioxide among cells is 44.5 mg. cm^-3 higher, the stomata resistance is 2.419 s. cm^-1 lower. The results have been bear out that water sufficient supply in the last period is the most important to prolong the leaves＇ physiological function and benefit to the yield of winter wheat.