论文部分内容阅读
天山圆柏主要分布于天山亚高山带。此带气候寒冷,多风,降水较森林带少,而且岩石裸露,上层浅薄,在这种严酷条件下生有的天山圆柏,植株低矮,匍匐于坡面,其主根较浅,侧根发达并沿坡面方向伸展。由于树径与根系的的位置趋于平行,这就给根系的处理造成了不便。
Tianshan Sabina mainly distributed in Tianshan subalpine zone. This belt with a cold climate, windy, precipitation less than the forest with bare rock, the upper superficial, born in this harsh conditions Sabina przewalskii, plant low, creeping on the slope, the main root is shallow, developed lateral roots And stretch along the slope surface. As the location of tree roots and roots tend to be parallel, this causes inconvenience to the root system.