北京十三陵林场侧柏人工林林分结构的研究  

Stand Structure of Platycladus orientalis Plantation in Shisanling Forest Farm of Beijing

作　　者：戎建涛[1] 雷相东[1] 陆元昌[1] 刁军[1] 国红[1] 

机构地区：[1]中国林业科学研究院资源信息研究所,北京100091

出　　处：《安徽农业科学》2010年第2期989-994,共6页Journal of Anhui Agricultural Sciences

基　　金：北京市科委重大科技项目(D0706001000091)

摘　　要：以北京十三陵林场侧柏人工林13块样地资料为依据，研究其林分结构的特点和规律。结果表明，侧柏林林分平均密度为1535株／hm^2，平均高6．2m．断面积平均胸径为10．9cm，平均断面积为14．69m^2／hm^2，平均蓄积量为56．75m^3／hm^2。应用正态分布、Weibull分布、对数正态分布、Gamma分布和Beta分布拟合直径和树高结构，发现正态分布和Weibull分布拟合直径分布和树高分布效果最好，也符合人工林的林分结构规律。侧柏人工林层次结构简单，物种多样性低，乔木层、灌木层和草本层的Shannon—Weiner指数、均匀度指数平均值分别为0．85、0．58．0．75、0．39，0．78、0．58。在0～30cm阶段，更新幼苗以鹅耳枥、臭椿、槲树和栓皮枥为主；在30～50cm阶段，更新幼苗以槲树为主要更新树种；在50cm以上阶段，更新幼苗以侧柏、黄栌等喜光性树种为主，且每公顷50cm以上株数占总株数的55．5％。同时提出了“近自然森林经营”部分建议。Thirteen sample plots were investigated to study the structure and the characteristics of Platycladus orientalis plantation samples in Shisanling forest farm of Beijing. The results showed that the average density, average height, the quadratic average diameter at breast height, average basal area and the average stocking volume of the stand were 1 535 per hm^2, 6.2 m, 10.9 cm, 14.69 m2/hm2 and 56.75 m^3/hm2 respectively. Using normal distribution, Weibull distribution, log-normal distribution, Gamma distribution, Beta distribution for describing the structure of height and diameter of Platycladus orientalis plantation, it was found that normal distribution and Weibull distribution were the best functions to depict the structure of height and diameter. And the results accorded with the law of the forest plantation. The forest structure of Platycladus orientalis plantation was simple with low biodiversity in tree, shrub, and herbaceous layers. Shannon-Weiner diversity index and evenness index were 0.85 and 0.58 at tree layer, 0. 75 and 0.39 at shrub layer, and 0.78 and 0. 58 at herb layer respectively. Carpinus turczaninowii,Ailanthus ahissima, Quercus dentate and Quercus t,ariabilis were dominant in the layer of 0- 30 cm. Quercus dentate was dominant in the layer of 30 -50 cm and Platycladus orientalis and Cotinus coggTgria were dominant in the layer of higher than 50 cm. The number of seedlings higher than 50 cm accounted for 55.5 percent of the total number of seedlings. Management suggestions based on close-to-nature forest management were proposed.

关 键 词：侧柏 林分结构 物种多样性 更新 

分 类 号：S791.38[农业科学—林木遗传育种]