广西百色细叶云南松天然林生物量研究

采用样地调查及标准木法，对广西国有雅长林场细叶云南松天然林中林（23年）乔木层、灌木层、草本层、凋落物层的生物量进行研究，结果表明，（1）23年生细叶云南松天然林生态系统总生物量为140.06 t/hm^2。（2）各层次的生物量分布为，乔木层127.75 t/hm^2，占总生物量91.21％，其中细叶云南松生物量124.01 t/hm^2，占总生物量88.54％；灌木层5.21 t/hm^2，占3.72％；草本层2.56 t/hm^2，占1.83％；枯枝落叶层4.54 t/hm^2，占3.24％。（3）乔木层生物量在各器官的分布为，干材生物量57.61 t/hm^2（46.46％），皮9.97 t/hm^2（8.04％），枝23.25 t/hm^2（18.75％），叶9.26 t/hm^2（7.47％），根23.92 t/hm^2（19.18％）。

Biomass of Pinus yunnanensis var.tenuifolia Natural Forest in Baise Region of Guangxi Province

Based on the data collected from a standard permanent plot of Pinus yunnanensis var.tenuifolia natural forest in Guangxi Yachang Forest Farm , the amount and distribution of biomass was studied by investigating and sample tree harvesting method , and the results showed that： 1） The total vegetation biomass of Pinus yunnanensis var.tenuifolia forest was 140.06 t/hm^2 .2） The distribution law of biomass in each layer were arbor layer 127.75 t/hm^2 （91.21 %）, of which overstory trees contributed the large proportion （88.54%） and amounted to 124.01 t/hm^2 , shrub layer 5.21 t/hm^2 （3.72%）, herb layer 2.56 t/hm^2 （1.83%）, litter 1ayer 4.54 t/hm^2 （3.24%）. 3） In the overstory layer , the biomass was allocated as 57.61 t/hm^2 （46.46%） for trunk, 9.97 t/hm^2 （8.04%） for bark, 23.25 t/hm^2 （18.75 %） for branch, 9.26 t/hm^2 （7.47 %） for leaf, and 23.92 t/hm^2 （19.18 %） for root .