伊犁郁金香和阿尔泰郁金香不同居群的物候特点

对分布于新疆的伊犁郁金香和阿尔泰郁金香不同居群的物候特征进行了连续两年的详细观察，结果表明；两种植物的所有居群均具有萌动及结实早、生长发育快、年生长期在70-90d，且生殖生长在年生长期中所占比例较大等物候特点；同一居群内植株开花比较集中，年际间物候期无明显波动，但不同居群在年生长期及萌动、始花等主要物候期上存在差异，且这种差异在营养生长阶段不明显，进入生殖生长后逐渐增大；伊犁郁金香不同居群物候期的早晚与海拔因素有关。

Phenological Characteristics in Different Populations of Tulipa iliensis Regel and Tulipa altaica Pall ex Spreng.

The phenological characteristics in different populations of T.iliensis and T.altaica were observed for two consecutive years.The main results were as follows: all populations of two species germinated and grew rapidly,and the reproductive growth period accounted for more than two thirds of annual development cycle which ranged from sixty to ninety days.Therefore,both of species belonged to ephemeroid plants escaping from drought;the plants in most populations flowered in four to nine days and there were no obvious phenological differences within population in two years;however,differences existed in annual development cycle and main phenophase in the same year among populations;phenophase among populations of T.iliensis were related to altitude factors.