樟子松人工林单木叶量垂直分布规律

Foliage Vertical Distribution of Mongolian Pine Plantations

以黑龙江省佳木斯市孟家岗林场不同年龄、不同密度和立地条件下的樟子松(Pinus sylvestris var.mongolica Litv.)人工林为研究对象,用树干解析、枝解析等方法于2005年测定了6块样地及30株标准木的树冠因子。分别应用修正Weibull式和Richards式拟合了樟子松单木叶量垂直分布,分析了林分密度、林龄等林分条件对叶量垂直分布的影响、樟子松单木叶量与树干生长的关系以及单木叶量与叶面积指数(LAI)的关系。研究结果表明:樟子松单木叶量的垂直分布符合修正Weibull式或Richards式;单木叶量最大值出现在相对着枝深度0.36～0.85范围内。树冠内叶量最大处的相对位置与树木大小的相关关系不明显;单木累积叶量随林分密度的增大而减小。单木叶量与其最近1a的胸径生长量呈幂函数关系,与最近1a的材积生长量呈直线关系。

The vertical distribution oi toliage biomass oi Mongolian pine and the relationship between tohage biomass and tree growth were analyzed according to stem analysis, branch analysis and biomass survey of 30 sample trees in 6 sample plots in Mongolian pine plantations with different ages and stand densities in Mengjiagang forest farm of Jiamusi City in 2005. Results indicated that the Weibull equation and Cbapman-Richards equation were appropriate to describe the foliage bio- mass distribution of Mongolian pine. The foliage biomass reached the maximum value as the relative depth-into-crown ranged from 0.36 to 0.85. An unobvious relation was found between the position of the maximum foliage biomass and tree size. The foliage mass of the individual tree increased with stand density decreasing. The relationship between foliage mass of the individual tree and the increment of diameter at breast height for the previous year was in power function, and the foliage biomass is linearly related to volume increment of the previous year.