论文部分内容阅读
采用树干解析法分析了闽北高海拔地区湿地松人工林的生物量和生长量。结果表明:湿地松各器官的生物量大小排序为干>枝>根>叶>果,水分分配为根>干>叶>枝,单株平均含水率为56.19%;33a生湿地松种群总生物量为396 735kg/hm2,净生产力为12 022.27 kg/(hm2·a);33a生湿地松人工林的树高、胸径、单株材积分别达到了21m,24.6cm,0.380 5m3;胸径和树高分别出现3次和4次生长高峰,且高生长期与低生长期年份基本一致。树高连年生长曲线与平均生长曲线出现多次相交,材积的变化幅度相对较小。运用SPSS 13.0拟合了胸径、树高、材积总生长量与树龄之间的回归方程,拟合模型精度较高。
The biomass and growth of Pinus elliottii plantations in northern Fujian were analyzed by tree trunk analysis. The results showed that the order of biomass was as follows: stem> branch> root> leaf> fruit. The distribution of water was root> stem> leaf> branch, the average water content of each plant was 56.19% The net productivity was 12 022.27 kg / (hm2 · a). The plantation height, DBH and single plant volume of 33a wetland plantations reached 21m, 24.6cm and 0.380 5m3, respectively. The DBH and tree height The 3rd and 4th growth peak appeared respectively, and the high growth period and the low growth period were basically the same. The annual growth curve of tree height intersects the average growth curve several times, and the variation of volume is relatively small. The regression equation between DBH, tree height, volume growth and tree age was fitted by using SPSS 13.0, and the fitting model was more accurate.