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对栝楼雌雄植株生长发育关键时期的光合作用和蒸腾作用进行研究.结果表明:在营养生长阶段,栝楼雄株的光合速率、蒸腾速率、气孔导度和水分利用效率均大于雌株;雄株比雌株提前22 d进入生殖生长阶段,当雄株进入生殖生长阶段后,其光合速率、蒸腾速率和气孔导度均大于雌株,但水分利用效率略小于雌株;当雌株进入生殖生长阶段后,其蒸腾速率和气孔导度大于雄株,而光合速率和水分利用效率显著小于雄株.气候因子对栝楼生长发育的影响主要是在营养生长和生殖生长初期,栝楼生长发育后期对气候因子的响应程度减弱.较高的温度和较低的湿度有利于栝楼的生长发育,光照可提高栝楼尤其是雄株的光合速率.进入生殖生长后,雄株的光合速率随光照的增强显著增加,而雌株的光合速率增加不显著;随气温的升高,雄株的蒸腾速率显著提高,雌株的光合速率极显著提高.
The photosynthesis and transpiration of the male and female plants in the stage of growth and development were studied.The results showed that the photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency When the male plants entered the stage of reproductive growth, their photosynthetic rate, transpiration rate and stomatal conductance were greater than those of the female plants, but the water use efficiency was slightly less than that of the female plants. When the female plants entered the reproductive stage, After the growth stage, the transpiration rate and stomatal conductance were higher than those of the male plants, while the photosynthetic rate and water use efficiency were significantly less than those of the male plants. The climatic factors on the growth and development of the stomatal mainly in the vegetative and reproductive growth, growth and development The response to climatic factors was weakened in the later period.High temperature and low humidity were beneficial to the growth and development of S. mandshurica.Photophyll photosynthesis rate increased after males and females, The photosynthetic rate increased significantly, but the photosynthetic rate of female plants increased insignificantly. With the increase of temperature, the transpiration rate of male plants increased significantly, and the photosynthetic rate of female plants was extremely significant High.