西双版纳热带次生林净初级生产量的初步研究  

A PRELIMINARY STUDY ON THE NET PRIMARY PRODUCTION OF THE SECONDARY TROPICAL FOREST IN XISHUANGBANNA

作　　者：唐建维[1] 张建侯[1] 宋启示[1] 冯志立[1] 党承林[2] 吴兆录[2] 朱胜忠 段文勇 

机构地区：[1]中国科学院西双版纳热带植物园热带雨林生态系统定位研究站,云南勐腊666303 [2]云南大学生态学与地植物学研究所,昆明650091 [3]西双版纳国家级自然保护区管理局勐腊保护所,云南勐腊666300

出　　处：《植物生态学报》2003年第6期756-763,共8页Chinese Journal of Plant Ecology

基　　金：国家科技部基础研究重大项目 ( 2 0 0 1CCB0 0 60 0 );国家自然科学基金项目 ( 3 8970 168)

摘　　要：采用径级标准木和维量分析方法研究了西双版纳热带次生林 4块不同年龄林分的净初级生产量 ,结果表明 :林分净初级生产量随林龄而增长 ,5年生林分为 115 4 .3g·m-2 ·a-1,其分配为 :净生长量占 93.82 % ,花果量占1.2 0 % ,叶被采食量 4 .97% ;10年生林分为 1348.5g·m-2 ·a-1,净生长量占 92 .83% ,花果量占 3.2 5 % ,叶被采食量3.92 % ;14年生林分为 2 2 12 .1g·m-2 ·a-1,净生长量占 91.72 % ,花果占 3.0 5 % ,叶被采食量 5 .2 3% ;2 2年生林分为2 6 6 0 .1g·m-2 ·a-1,净生长量占 92 .0 9% ,花果占 3.95 % ,叶被采食量 3.96 %。林分净初级生产量的器官分配以茎所占的比例最大 ,占 1/ 3以上 ;其次为根 ,占 1/ 5左右 ;枝和叶为 1/ 5～ 1/ 7;花果所占的比例除 5年生林分相当少外 ,其余 3个林分约占 1/ 33。林分净初级生产量的层次分配以乔木层所占的比例最大 ,占 2 / 3以上 ,其次为灌木层 ;草本层和层间植物所占的比例相当少。林分的叶面积指数随林龄而增大 。Vast areas of secondary tropical forest occur in Xishuangbanna owing to slash and burn cultivation and the destruction of tropical forest, which is a huge carbon and nutrient element bank. In order to know the dynamics of growth and bio_productivity of secondary tropical forests in different stages, “size class standard tree' and “the dimension analysis' methods were used to estimate the net primary productivity of four secondary tropical forests in different stand ages in Xishuangbanna. The results showed that the net primary productivity of four stands increases with stand age, which was 1 154.3 g·m -2·a -1 in 5_year_stand, 1 348.5 g·m -2·a -1 in 10_year_stand, 2 212.1 g·m -2·a -1 in 14_year_stand, and 2 660.1 g·m -2·a -1 in 22_year_stand respectively. The allocation of net primary productivity in four stands showed that annual net growth had the highest net productivity, which was 93.82%, 92.83%, 91.72% and 92.09% in four stands respectively, leaf grazed ranked the second and represented 4.97%, 3.92%, 5.23% and 3.96% respectively, and reproductive parts contributed 1.20%, 3.25%, 3.05% and 3.95% respectively. In the allocation of net primary productivity among different parts of plants in four stands, the net primary productivity of stem ranked the first, which occupied 35.79% of the total in 5_year_stand, 38.96% in 10_year_stand, 38.82% in 14_year_stand and 35.94% in 22_year_stand, and that of root was the second which made 23.03%, 21.38% and 23.18% of the total in 5_year_stand, 10_year_stand and 14_year_stand respectively except that of 19.26% of the total in 22_year_stand. Branch productivity increased with the stand age from 15.54% of the total in 5_year_stand to 23% of the total in 22_year_stand, while leaf contributed 23.53%, 17.81%, 18.50% and 18.49% of the total in four stands respectively which gradually decreased with the stand age. Although reproductive parts contributed only a little, it also increased from 1.20% of the total in 5_year_stand to 3.95% of the

关 键 词：净初级生产量 热带次生林 西双版纳 林分 

分 类 号：S718.55[农业科学—林学]