新疆早春短命及类短命植物的物候观测

根据1991～1992年观测,绘制了25种早春短命及类短命植物较完整的物候图谱。分析结果认为,新疆的早春短命植物萌动期在3月下旬至4月中旬之间,多年生类短命植物的萌动较一年生短命植物萌发早,萌发数量与整齐度主要取决于冬季降雪量和早春降雨量,6月下旬至7月上旬,绝大多数早春短命植物结束生长,整个生长周期平均75.8天,多者90—100天,少者40～60天,生殖期占生长周期的2/3时间。在气温逐日下降,雨量较多的秋季,多数植物种还可以再次萌发,形成个体较大的秋萌株。

Phenological Observation of the Early Spring Ephemeral and Ephemeroid Plant in Xinjiang

According to the two years observation of 1991 and 1992,the phenological spectrum of 25 species of preremal ephimeromhgte was compiled. It shows that the germination period of ephemeral and ephemeroid plant was complited. It shows that the germination period distribute between the below ten days of March and the middle ten days of April, most of the them end their growth between the below ten days of June and the above ten days of July,the average whole growth periodicity is 75. 8 days,the more is 90 to 100 days,the less 40 to 60 days,and the propagation period accounts for 2/3 of the vagetation period.