天然次生林中黄波罗生长情况的研究

Growth of Phellodendron amurense in Natural Secondary Forest

以哈尔滨市山河实验林场野生黄波罗为试验对象,研究了黄波罗的最适生长环境.结果表明黄波罗在幼龄林时需要一定程度的遮阴,阳坡的黄波罗幼龄林每hm^2 蓄积以郁闭度0.8时最大,阴坡以郁闭度0.7时最大;黄波罗在中龄林和近熟林时表现为喜光性,在郁闭度较小的环境下生长较好;同一龄组、同一郁闭度、同一坡位的黄波罗林分,阳坡的平均树高、胸径和蓄积均大于阴坡;黄波罗的每hm^2 蓄积均随着坡位的下降呈先升高后降低的趋势,且中坡位〉下坡位〉上坡位;黄波罗的hm^2 蓄积随着坡度的升高呈先增加后降低的趋势,且在坡度为11-15°时达到最大,〈10°时次之,21-25°时最小.

Taking wild Phellodendronamurense in Shanhe Shiyan Forest Farm of Harbin City as research objects, optimal growth environment of P.amurense were studied.Result shows that young forests of P.amurense require a degree of shade;volume of young forests of P.amurense at sunny slope per hm2 is the largest with the canopy density being 0.8,and the volume of that at shady slope is the largest with the canopy density being 0.7;P.amu-rense show light-demanding at the middle-aged and nearly-matured forests and grow optimal under the little canopy density;the mean tree height,DBH & volume of P.amurense stand with the same age group,canopy density &slope position at sunny slope are all larger than that at shady slope;the volume of P.amurense increased at first and then decreased per hm2 with the decrease of slope position,and middle slope position>lower slope position>upper slope position;the volume of P.amurense increased at first and then decreased per hm2 with the decrease of slope;the volume of P.amurense is the largest while the slope being 1 1°-1 5°;the volume of P.amurense is the second while the slope being less than 10°;the volume of P.amurense is the least while the slope being from 21°to 25°.