福建不同杉木产区杉木林生长差异比较

杉木是南方集体林区的主要树种,是我国重要的森林资源,但受区域气候、土壤条件影响,不同地域杉木林的生长状况存在较大差异.利用第8次全国森林资源一类清查福建省杉木林样地数据,随机选择有代表性的179个杉木林样地,采用数理统计方法和Richards生长方程模型,比较中心产区、一般产区和边缘产区杉木人工林的生长差异.结果表明:中心产区杉木林与其他产区杉木林胸径、树高生长差异大,体现在中心产区杉木的胸径和树高结构优于一般产区和边缘产区.采用Richards生长方程拟合的不同产区模型符合实际情况,中心产区Richards生长方程参数A=28.539 6,k=0.019 7,即中心产区杉木林的理论最大树高和生长速率大于其他产区.

Comparison of Growth Difference of Chinese Fir Plantations in Different Producing Regions of Fujian Province

Chinese fir is the main forest in South and one of important forest resources in China. Affected by the regional climate,soil conditions, the growth of Chinese fir plantation are quite different in different areas. 179 Chinese fir samples data among of the eighth national forest resources inventory in Fujian province were randomly selected to compare the difference of growth among the central region,the general region and the edge region with Richards model and the method of mathematical statistics. The results showed that the diameter and tree height of Chinese fir forests in central region are superior to the general region and edge region. The estimation of the growth equation based on the Richards model was tallied with the actual. For central region,Chinese fir growth equation is A=28 . 539 6 , k=0 . 019 7 , which also showed that the theory rate of tree height and growth in the central region are better than those in the general region and the edge region.