【摘要】 本文通过马尾松人工林的248块标准地平均木资料和6种生长方程分母岩类型对各调查因子与年龄相关进行拟合,揭示马尾松人工林各调查因子随年龄变化的规律。直径、树高生长以对数曲线方程最佳;材积生长以幂函数方程为最佳,相关指数均在0.98以上。更多还原

【Abstract】 Studies were made at 248 sample plots with different site conditions and ages of Masson pine plantation in Anhui province. The crowndensity was higher than 0.7. Mean sample trees from the 248 sample plots were analysed as well.The site types were differentiated depending Upon the rock types; two—year age grade of pine tree was employed in this research. The data were grouped depending on both site type and age — grade. Then the mean diameter, height and average timber volume of plantation at each age—grade were computed.Based upon the relative analysis with age—grade and investigated factors, six equations were employed to make a comparative analysis for diameter, height and timber volume respectively. One equation that has the highest correlation coefficient and is in keeping with the growing laws would be finally selected. The result shows that the logarithum and power equation clearly indicate the growing laws of diameter, height and timber volume respectively (R>0.98).更多还原