摘要
本文研究了普洱县小黑江地区海拔890～920 m的思茅松林的净第一性生产力.结果如下:①林分净第一性生产力随林龄增加而减少.12年生和23年生林分净第一性生产力分别为26.9603 t/hm^2·a和23.9554 t/hm^a.②林分净第一性生产力的层次分配顺序为:乔木层>灌木层>草本层.③林分净第一性生产力在器官间的分配顺序为:树干>枝、叶>根系>根劲>果实.④89％～90％的林分净第一性生产力集中分配在思茅松中. ⑤用重量比值法求算出12年生和23年生思茅松林分叶被采食量分别为0.8227 t/hm^2·a和1.3578 t/hm^2·a.
This paper studies the net primary productivity ( NPP of Pinus kesiya var langbianensis stands which, with an elevation 890~ 920 m. locate it Xiaoheijiang District, Pu-Er County, Yunnan. The results are as follows 1. The NPP of stands decreases as the stand age advances. The NPP of 12-aged stand is 26.9603 t/ hm2· a and that of 23-aged stand is 23.9554 t/ hm2· a. 2. The allocation order of NPP to community layers is: tree layer >shrub layer>herb layer. 3. The allocation of der of NPP to organs is: stem > branch, needle > root system > root neck > tone. 4. 80% ~ 90% of stand NPP allocates assembly to Pinus kesiya var langbianensis. 5. A methoe with weight ratio to measure grazed needle biomass is suggested. With this method. the grazed needle biomass of stands is calculated, namely, 0.8227 t / hm2·a in 12-agee stand and 1.3578 t / hm2· a in 23-aged stand.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
1992年第2期128-136,共9页
Journal of Yunnan University(Natural Sciences Edition)
基金
云南省应用基础研究基金资助项目
关键词
思茅松
被采食量
净初级生产力
Pinus kesiya var langbianensis, net primary productivity, allocation. grazed biomass
