摘要
本文研究了昌宁县西桂林场海拔1420～1710 m思茅松林的生物量和净第一性生产力.结果如下:①随着林龄增加,生物量增加而净第一性生产力减少.13年生林分的生物量为102.2936 t/ hm^2、净第一性生产力为24.5636t/hm^2·a, 35年生林分的生物量为218.5430t/hm^2、净第一性生产力为18.3600t/hm^2·a. ②活生物量及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净第一性生产力在器官间的分配顺序为:树干>叶>根、根系>根颈.13年生和35年生林分生物量在器官间的分配顺序分别为:树干>枝>叶>根系>根颈;树干>根系>根颈>枝>叶.比较发现,思茅松林分布区西北部林分的生物量和净第一性生产力比中部林分的低.
This paper studies the biomass and net primary productivity ( NPP) of Pinus kesiya var langbianensis stands which, with an elevation 1420~ 1710 m, locate in Xi-Gui forest farm, Chang-Nin County, Yunnan. The results afe as follows. 1. The total biomass of stands increase and the NPP decreases as the stand age advances. The biomass and NPP of 13-aged stand are 102.2936 t / hm2and 24.5636 t / hm2· a, those of 35-aged stand are 218.5430 t/ hm2and 18.3600 t/ hm2· a. 2. The allocation order of living biomass and NPP of stands to community layers is: tree layers > shrub layer > herb layer. 3. The allocation order of stand NPP to organs is: stem >needle >branch, root system > root neck. That of stand biomass to organs in 13-aged stand is: stem >branch > needle > root system > root neck; That of stand biomass to organs in 35-aged stand is: stem > root system > root neck > branch > needle. It is found that the biomass and net primary productivity of Pinus kesiya var langbianensis stands in the northwestern region are smaller than those in the central region.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
1992年第2期137-145,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
生物量
净初级生产力
Pinus kesiya var langbianensis. biomass, net primary productivity
