不同海拔对春青稞灌浆期旗叶生理特性的影响

Effects of Different Altitudes on Physiological Characteristics of Flag Leaves at Spring Barley Filling Stage

本研究以8个春青稞为研究材料,在西藏林芝市海拔2 748~3 386 m范围分别设3个点,运用传统方差分析及隶属函数分析等方法,探究不同海拔对不同青稞旗叶生理特性和产量性状的影响,揭示高原青稞对林芝市不同海拔区域响应的生理机理,为林芝市不同海拔区域青稞品种布局提供参考。得出以下结论:(1)从旗叶光合特性表现:不同熟型春播品种的旗叶光合特性对海拔响应不同,在倾多乡(2 748 m)中熟品种的光合特性最好,在巴宜区(2 982 m)早中熟型品种的光合特性最好,在多吉乡(3 386 m)早熟品种的光合特性最好。(2)从旗叶抗氧化酶系统和渗透系统表现看:倾多乡(2 748 m)、巴宜区(2 989 m)、多吉乡(3 386 m)3个点中晚熟型品种的SOD含量、POD含量、Pro含量较高。

In this study,eight spring barley were used as research materials,and 3 sites were set respectively in the altitude range of 2 748 ~ 3 386 m in Nyingchi City,Tibet.Traditional variance analysis and membership function analysis were used to explore the effects of different altitudes on physiological characteristics and yield characters of different flag leaves of highland barley,and to reveal the physiological mechanism of response of plateau highland barley to different altitude regions in Nyingchi City.It provides reference for the layout of highland barley varieties in different elevations of Nyingchi City.The photosynthetic characteristics of flag leaves were as follows:(1) The photosynthetic characteristics of flag leaves of spring sowing varieties with different ripening types were different in response to altitude.The photosynthetic characteristics of mid-ripening varieties in Huidao Township(2 748 m) were the best,that of early-middle ripening varieties in Bayi District(2 982 m) were the best,and that of early-maturing varieties in Duoji Township(3 386 m) were the best.(2) From the performance of antioxidant enzyme system and osmotic system of flag leaves,SOD,POD and Pro contents were higher in Huidao Township(2 748 m),Bayi District(2 989 m) and Duoji Township(3 386 m).