不同因素对青藏高原大花红景天苷含量的影响

Effects of Different Factors on Salidroside Content in Rhodiola crenulata on Qinghai-Xizang Plateau

为给西藏人工栽培大花红景天提供气象参考依据,分析了红景天苷与经纬度、海拔高度、气象要素的关系。结果表明:青藏高原地区大花红景天苷含量随着海拔高度的升高而增加,随纬度、经度的增加而减少。3月上旬降雪多、气温日较差大容易造成休眠芽坏死,不利于后期发芽,影响红景天苷的积累;5月中、下旬降水偏多,不利于萌芽,导致红景天苷含量降低;7月正值开花期,若气温日较差大、日照多,对红景天苷的积累较为不利;8月为结实期,降水少、日照多有利于提高红景天苷的含量;冬季降雪偏多,也不利于红景天苷的积累。

The relationship of salidroside content with longitude and latitude, elevation and meteorological elements was analyzed to provide a meteorological reference for artificial cultivation of R. crenulata on Qinghai-Xizang Plateau. The results showed that the salidroside content increased with elevation increasing while decreased with longitude and latitude increasing. Because of too much snow in the first ten days of March and great daily temperature range, the dormant buds were easy to die, which was bad for bud sprouting and salidroside accumulation. Too much precipitation in the middle and last ten days was bad for germination and consequently made salidroside content decrease. It was flowering period in July, great daily temperature range and too much sun exposure would be bad for salidroside accumulation. August was fruiting period, less rainfall and more sunshine was conducive to increase the content of salidroside. Meanwhile, the disadvantageous conditions for the accumulation of salidroside was more snowfall in Winter.