秦岭火地塘林区主要森林类型的现存量和生产力

本交通过建立森林各器官的生物量、材积和叶面积的估计方程，量化地反映了火地塘林区5个主要森林群落的异速生长规律。火地塘林区5个森林类型的平均现存量为133．42t／hm2，平均蓄积量为166．825m3／hm2，平均生产量为3．757t／hm2·a；平均材积生长量为7．138m3／hm2；死地被物量为89．512t／hm2。在各森林类型的适生垂直带内，随着海拔升高，现存量和现有生产力呈下降趋势。同一树种人工林的生长优于天然林，具有更大的生物量和生产力。

Standing Crops and Productivity of the Major Forest-types at the Huoditang Forest Region of the Qinling Mountains

By means of simulating the regressions of biomass, volume, leaf- area of each organs of the forests,allometric rules of the five main forest communities at the Hueditang forest region were quantitavely studied, The average standing crop, average stocked volume,average produc-tion, average volume increment and the standing crop of dead ground - stratum of the forests were 133- 42t/hm2, 166.825m3/hm2, 3. 757t/hm2. a, 7. 138m3/hm2 and 89. 5, 2t/hm2 respec-tively. At the most adaptive belt of the vertical spectrum,the standing crop and productivity of each forest-types tended to decrease with the rising of elevation. Growth of the artificial forest that had also larger blomass and productivity was better than that of the natural forests.