接坝山区陡坡地段不同坡向油松造林生长状况分析

Growth Status of Pinus tabulaeformis at Different Slopes in Connecting the Joint Mountains between the Plateau on the Dam and the Norhern Mountain of Hebei Province

通过对接坝山区陡坡地段不同坡向油松造林成活率与生长状况进行的调查,结果表明:(1)阳坡的油松存活率最高,阴坡最低,大小排序为阳坡>半阳坡>半阴坡>阴坡。(2)阳坡的油松人工林地径最小,阴坡最大,大小排序为:阴坡>半阴坡>半阳坡>阳坡。(3)阳坡的油松树高最小,阴坡最大,大小排序为:阴坡>半阴坡>半阳坡>阳坡。

The survival rate and growth status of Pinus tabulaeformis forests at different slopes in connecting the joint mountains between the plateau on the dam and the norhern mountain of Hebei Province were investigated.Result shows that:(1)The survival rate of Pinus tabulaeformis on the sunny slope is the highest,and the shady slope is the lowest.The descending order of size is sunny slope>semi sunny slope>semi shady slope>shady slope.(2)The ground diameter of Pinus tabulaeformis plantation on the sunny slope is the smallest;the ground diameter of Pinus tabulaeformis plantationon on the shady slope is the highest;the descending order is:shady slope>semi shady slope>semi sunny slope>sunny slope.(3)The height of Pinus tabuliformis on the sunny slope is the lowest,and the height of Pinus tabuliformis on the shady slope is the highest.The descending order of the size is:shady slope>semi-shady slope>semi-sunny slope>sunny slope.