树的年轮较密的向着哪一面?较疏的向着哪一面?
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/08 04:50:08
树的年轮较密的向着哪一面?较疏的向着哪一面?
树的年轮较密的向着哪一面?较疏的向着哪一面?
树的年轮较密的向着哪一面?较疏的向着哪一面?
因为在树木生长过程中.树干朝南一面受阳光照射较多,形成层原始细胞分裂也较迅速,径向生长加快,结果茎干南面的年轮也较宽.而在茎干背阴朝北的一面,年轮则明显狭窄.
````````````````````````````````````````````````````````````````````````````````hsbbcvbhvgbdjfbdjkbvjbsbjkdfhgjkhdfjgsjdhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhjgggggggggggggggg...
全部展开
````````````````````````````````````````````````````````````````````````````````hsbbcvbhvgbdjfbdjkbvjbsbjkdfhgjkhdfjgsjdhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhjgggggggggggggggggggggggjhhhhhhhhhhhffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrreeeee
收起
密,南。疏,北。
较密的是朝阳面,反之是背阴面