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以秦岭南坡栓皮栎天然次生林间伐后形成的不同大小林窗实生苗为材料,采用典型抽样法调查林窗大小对栓皮栎实生苗枝系构型、叶片特征及其垂直分布的影响.结果表明:林窗大小显著影响了栓皮栎实生苗的地径、树冠面积,林窗大小与地径呈显著正相关,与树冠面积呈显著负相关;林窗大小对实生苗苗高、冠长、树冠率均无显著影响;实生苗总体分枝率、逐步分枝率、枝径比均表现为大林窗>中林窗>小林窗>林下,不同林窗大小实生苗一级枝在垂直方向上主要分布于干的中、上部,直径较大的一级枝主要分布在中下部,一级枝倾角均随苗高的增高呈先增加后降低的趋势;随着林窗面积的增大,实生苗的叶长、叶宽和单叶面积逐渐下降,平均单株叶数、相对高度上的总叶数增加,叶长宽比在不同大小林窗下均保持稳定,相对叶数均在干的中上部分布较多,叶面积指数与相对叶总数的变化一致;中林窗实生苗地径与大林窗无显著差异,但苗高较高,利于栓皮栎种群更新及培育优质干材.在栓皮栎林经营管理过程中,需确定合适的间伐强度增加中林窗数量,促进栓皮栎实生苗更新以及培育优质干材.
Based on typical sampling methods, the effects of gap size on the branch configuration, leaf characteristics and vertical distribution of Quercus variabilis seedlings were investigated by using the seedlings of different sizes of Gap plantation formed after natural cutting of Quercus variabilis secondary forest on the southern slope of Qinling Mountains. : The size of canopy significantly affected the diameter, canopy area and canopy size of canopy seedlings. The size of canopy gap was significantly and positively correlated with ground diameter, but negatively correlated with canopy area. No significant effect was observed in the seedlings. The overall branching rate, gradual branching rate and branch-diameter ratio of seedlings all showed Dalin window> Zhonglin window> Kobayashi window> Mainly distributed in the dry, the upper part of the larger diameter of the primary branches are mainly distributed in the lower part of the first branch with the height of the seedling height increased first and then decreased; with the increase of the gill area, The leaf length, leaf width and single leaf area of seedlings decreased gradually. The average number of leaves per plant, the total number of leaves at relative height increased, and the leaf aspect ratio remained stable under different size gaps, More distribution, leaf area index and phase The change of the total number of leaves was the same; the diameter of seedling of Zhonglin window had no significant difference with that of Dalin window, but the higher seedling height was conducive to the regeneration of Quercus variabilis population and the cultivation of high quality dry material.In the management of cork oak forest, The thinning intensity increased the number of gaps in the gaps, promoted the regeneration of seedlings of Quercus variabilis, and cultivated high-quality dried material.