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以东北林业大学帽儿山实验林场老山人工林实验站红松人工林为例,用对比分析的方法研究了不同起源、林分结构以及不同立地条件下红松人工林木分杈情况,揭示了红松林木分杈的外在原因,并提出了防治措施。结果表明:不同起源、林分结构和不同立地条件下,红松人工林木分杈高度与分杈率差异明显,人工林较天然林,混交林较纯林,阴坡较阳坡分杈率分别相对降低667%~722%,861%、626%;分杈高度人工林较天然林相对降低了750%~864%,混交林较纯林、阴坡较阳坡增加了628%、364%。红松人工林木分杈有随密度增大,分杈率下降,而分杈高度增加的趋势。
Taking the Pinus koraiensis plantation in Maoershan Experimental Station of Mao’er Mountain Experimental Forest Farm in Mao’er Mountain, Northeast Forestry University as an example, comparative analysis was carried out to study the bifurcation of Korean pine plantations with different origins and stand types and different site conditions, revealing The external reason of the branch of Korean pine forest and its prevention and control measures are put forward. The results showed that the bifurcation height and bifurcation rate of Korean pine plantation were significantly different under different origins, stand structure and different site conditions. Compared with natural forest and mixed plantation, Compared with the natural forest, the relative birch height decreased by 750% -864%, while that in the mixed forest was lower than that of the pure forest The slopes increased by 62.8% and 36.4% more than the sunny slopes. Korean pine plantation bifurcation with density, bifurcation rate decreased, while the bifurcation height increased.