中文摘要：

对8种广泛分布于新疆北部荒漠的十字花科早春短命植物物候特征及其对荒漠环境的适应进行了观测与分析。结果表明，8种植物的种子均在3月中、下旬萌发，5月下旬至6月上旬果实成熟，生活周期均在54～79d，其营养生长期约占整个生活周期的1／3，而生殖生长期约占2／3。植株的生长发育与温度及降水存在密切的联系，说明8种植物均属于典型的避旱型早春短命植物，其短的生活周期是逃避准噶尔荒漠夏季干热气候的一种适应对策。

英文摘要：

The phenology of eight early spring ephemeral plants in Brassicaceae which are common in North Desert of Xinjiang,China were observed. The results showed that： Time of seeds germination was between the middle ten days of March and the last ten days of March,the fruits matured fully between the last ten days of May and the first ten days of June,and the life cycles were from 54 days to 79 days; In eight species the vegetative growth period accounted for 1/3 of life cycles,and the reproductive growth period accounted for 2/3. The growth of plants was relative to the temperature and precipitation. The above results showed that eight species have adopted special strategies to adapt the dry and hot environment of desert in summer.