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一九七三年,我们在凉水林场后山红松人工幼林内,发现二十二年生红松幼树梢头分叉情况,这种情况严重影响成材,我们在小兴安岭其他林场红松人工林内也发现同样的情况.看来,这种现象在红松人工林内是比较普遍的. 一九七四年,我们通过标准地每木调查,想要了解人工林内造成红松幼树分叉的原因,哪一年开始分叉以及林分因子对树木分叉的影响.方法是:1、我们选择十四和十六两个林班为标准地,采用随机取样五点式调查方法,在每一林班上取五个点(成梅
In 1973, we found the bifurcation of twenty-two-year-old Pinus koraiensis trees in the young plantation of Pinus koraiensis in Liangshui Forest Farm. This situation seriously affected the quality of the timber. We also found that in other Pinus koraiensis plantations in the Xiaoxing’an Mountains It seems that this phenomenon appears to be common in Pinus koraiensis plantations, and in 1974 we conducted a standard per-tree survey in order to understand the reasons for the divergence of young trees in the plantations, Which year began to bifurcation and stand factors for tree bifurcation.Methods: 1, we choose 14 and 16 two forest classes as a standard, using a random sampling five point survey method, in each forest Take five points in the class (into the plum