北京地区不同绿期白蜡资源及生长节律研究
Study on Growth Rhythm Fraxinus Chinensis of Different Green Period Trees
摘要:
本文对北京地区行道树白蜡种质资源进行调查，观测其植物学特征及生物学特性，并研究其生长规律。绿期长的白蜡树叶片颜色较深，11月底或12月初开始落叶，全年最长绿期达261天；而绿期短的白蜡树叶片一般呈浅绿色，于10中旬开始落叶，全年绿期200天左右。白蜡树叶片一个完整发育周期约为25天。不同性状的单株，其叶片在发育过程中有的是1次生长峰值，有的出现2次生长峰值。
Abstract:
This paper investigates the germplasm resources of Fraxinus Chinensis of road tree in Beijing area, and observes its botany characteristics & biological properties, and studies its growth rhythm. The results showed that a complete growth cycle of a leaf is about 25 days; Peak growth of some plants is only once; Other plants is two times. Deciduous period of long green Fraxinus tree is in the end of November to early December and its green period has up to 261 days. While the shortest green period is only 200 days, deciduous period of short green Fraxinus tree is in mid-October.
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