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1、本文运用数量化(Ⅰ)的理论证明了该环境中的赤松人工林在林令相同,土壤、植被条件基本一致的情况下,把不同坡向和坡度条件下的不同密度的林分放在一起进行比较它们的生长情况是合理的。 2、在赤松人工林现存密度为1000—5000株/公顷范围内,经方差分析,每公顷现存株数以4000—5000株为宜。 3、当赤松人工林进入始伐年令时及时进行人工整枝可以推迟起始间伐期,使间伐下来的小杆径级较大,以便获得更多的商品材。 4、造林的初植密度与成活率无关。但调查材料表明初植密度与保存率呈正相关,达到相关显著水平。 5、从经济效益上看,4000—5000株/公顷,每公顷净收入比1000—2000株/公顷多5,376.91元。同时密度大的林分郁闭早,产生森林生态效益也早,对保护环境、调节生态平衡都更为有利。
In this paper, using the theory of quantitative (Ⅰ), we proved that the Pinus densiflora plantation in this environment, under the same planting conditions, the same soil and vegetation conditions, the different densities of stands under different slope and slope conditions It is reasonable to compare their growth together. In the existing density of 1000-5000 plants / hectare in the plantation of Pinus densiflora, the existing number of plants per hectare is 4000-5000 plants by variance analysis. 3, when the Pinus densiflora plantation into the beginning of the cut-off time of artificial pruning can delay the initial thinning period, so thin down the smaller rod diameter larger in order to obtain more commercial timber. 4, the initial planting density and survival rate has nothing to do. However, the survey materials showed that the initial planting density and preservation rate was positively correlated, reaching a significant level. 5, from the economic point of view, 4000-5000 plants / hectare, net income per hectare more than 1000-2000 plants / hectare 5,376.91 yuan. At the same time, the forest with dense density is closed early and the forest ecological benefit is also early, which is more beneficial to the protection of the environment and the adjustment of ecological balance.