8种十字花科短命植物的物候及其对荒漠环境的适应  

The Phenology of Ephemeral Plants of Eight Brassicaceae and Its Adaptation to the Desert Environment

作　　者：马生军[1] 刘晓风[1] 谭敦炎[1] 

机构地区：[1]新疆农业大学林学院,乌鲁木齐830052

出　　处：《新疆农业大学学报》2006年第4期1-4,共4页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金重大研究计划(90302004);新疆高校科研计划(XJEDU2004123);国家863计划项目(2004AA227110-2)

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。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.

关 键 词：短命植物 十字花科 物候 

分 类 号：Q142.2[生物学—生态学]