水分胁迫下夏玉米的生理特性及补偿效应

苗期—拔节期水分控制对夏玉米的正常发育生长都有影响,水分控制越严重,抑制生长发育越明显;控水结束后复水,各指标的生长速度都明显加快,形成明显补偿效应。对于光合和蒸腾来说,复水后,其光合的增幅要大于蒸腾的增幅,也就是说其光合的补偿效应要强于蒸腾。苗期—拔节期控水,不会降低产量,会很大程度上提高水分生产效率,达到节水,高效的目的。

The Physiological Character and Compensation Effect of Summer Maize on Water Stress

In order to prove the change character of each physiological index and compensation of summer maize,the experiment that controlled water to summer maize,the results show that the water-controlled on seeding period and jointing period,it can affect the growth,the severe of water-controlled,the more obvious of growth inhibition;rewatering after water-controlled finish,the growth of every index are speed up,format obvious compensation effect.For photosynthesis and transpiration,the increase range of photosynthesis was more than that of transpiration,that is say the compensation effect is obvious stronger than that of transpiration.The yield is not reduced and the water conduction efficiency is improved in large degree,reach to the goal of water-saving,high efficiency.