沙冬青幼苗生长规律初步分析

沙冬青〔Ammopiptanthus mongolicus (Maxim) Cheng f.〕是我国蒙新荒漠特有常绿木本孑遗植物,现处渐危状态,属国家重点保护植物。吐鲁番沙漠植物园1979年从内蒙古引进沙冬青,现已开花结实,表现良好。1987年,对1年生播种苗生长发育等指标进行定期观测研究,初步结果如下:

Primary Study on Growth Rhythm of Seedling of Ammopiptanthus mongolicus

The growth Phase of A.mongolicus has been divided into the four nhases of the sprout, the youngplant, the qui-rowth and the seedling hardening, The growth of the height, the diameter and the root length have their respective characteristics. The growth rate is affected by the average temperature in ten-day periods. The relations between the height growth,the diamater growth and the root growth are explaid.The water content rate and the dry weight of superground and underground part are different obviosly. The dry matter rapid aacumulating bases on the extending of the phetosynthetic area.