黄龙山林区不同郁闭度对辽东栎种群结构的影响
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西北农林科技大学陕西省林业综合实验室,西北农林科技大学陕西省林业综合实验室,西北农林科技大学陕西省林业综合实验室,西北农林科技大学陕西省林业综合实验室,西北农林科技大学陕西省林业综合实验室

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陕西珍贵用材树种质资源培育关键技术研究(20150210169);国家“十二五”科技支撑计划课题(2012BAD22B030204)


Effects of different crown densities on structure of Quercus wutaishanica populations in Huanglong Mountains, Northwest China
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Key Comprehensive Laboratory of Forestry in Shaanxi Province ,Northwest ADdDd F University,Key Comprehensive Laboratory of Forestry in Shaanxi Province ,Northwest ADdDd F University,Key Comprehensive Laboratory of Forestry in Shaanxi Province ,Northwest ADdDd F University,Key Comprehensive Laboratory of Forestry in Shaanxi Province ,Northwest ADdDd F University,Key Comprehensive Laboratory of Forestry in Shaanxi Province ,Northwest ADdDd F University

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    摘要:

    辽东栎是黄龙山林区主要的建群种,通过典型取样选择16块样地,对其年龄结构、静态生命表、存活曲线、高度级结构、冠幅结构的绘制,研究其在不同郁闭度(0.6、0.7、0.8、0.9)不同坡向(阴坡、阳坡)生境中变化规律。结果表明:辽东栎幼苗数量在郁闭度0.6、0.7、0.8、0.9样地中,分别占全部个体数量的57%、64%、36%、47%,从年龄结构、静态生命表、存活曲线均表明辽东栎幼苗在4个不同郁闭度中比例都是最大的,大树比例次之,幼树小树比例最少,幼树小树是辽东栎更新瓶颈阶段,辽东栎种群存活曲线均属于R.PearlⅢ型,在郁闭度0.7波动最小;从辽东栎种群的年龄结构、静态生命表、存活曲线、高度级结构、冠幅结构等指标综合表现中可以看出辽东栎种群在郁闭度0.7生境优于郁闭度0.6、0.8、0.9生境;辽东栎在阳坡的幼苗、幼树、小树、比例高于阴坡,而大树比例低于阴坡;除高度级a外,阳坡多集中在c、d、e高度级,阴坡高度级多集中在d、e、f;在阳坡冠幅级⑩以下均有分布,在阴坡冠幅多集中在冠幅级⑦以下;无论在阳坡还是阴坡,郁闭度0.7更适合辽东栎更新生长,可以作为西北地区抚育间伐的理想条件。

    Abstract:

    Quercus wutaishanica is one of Huang Long Mountains forest region main building group of species, 16 pieces of sample area were selected by typical sampling method, age class,static life table, survivorship curve, height class and crown width class, researching age class,static life table, survivorship curve, height class and crown width class were drew to survey the change rule in different crown density(crown density is 0.6、0.7、0.8 and 0.9) under different slope(shady slope and sunny slope). The results showed that Q. wutaishanica saplings respectively made the total individual number 57%、64%、36%、47% in different crown densities(crown density is 0.6、0.7、0.8 and 0.9), age class, static life table and survivorship curve indicate the Q. wutaishanica seedlings in four different crown densities, the Q. wutaishanica seedlings made the maximum proportion, and then the adult trees, saplings made the least proportion. The general performance of population age class, static life table, survivorship curve, height class and crown width class of Q. wutaishanica showed that Q. wutaishanica population in crown density of 0.7 was superior to the crown density of 0.6, 0.8 and 0.9. Saplings and small trees were the update bottleneck stage of Q. wutaishanica.The survivorship curve of Q. wutaishanica was belong to R.PearlⅢ type, fluctuated least when the crown density was 0.7. The proportion of seedlings, saplings and small trees in sunny slope was higher than shady slope, while the proportion of mature stand in sunny slope was less than shady slope. Except the height class a, height classes of sunny slope were more concentrated in the height class c, d, and e, while height classes of shady slope were more concentrated in the height class d, e, and f. In sunny slope, Crown breadth class distributed under 5m, while crown breadth of shady slope mainly distributed under 3.5m. In both the sunny slope and shady slope, crown density of 0.7 is more suitable for Q. wutaishanica to update and grow, which can be used as ideal conditions of tending thinning in Northwest of China.

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于世川,张文辉,李罡,杨斌,余碧云.黄龙山林区不同郁闭度对辽东栎种群结构的影响.生态学报,2017,37(5):1537~1548

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