摘要
采用相对生长法研究了中幼龄毛白杨优良无性系生物量增长及其各器官相对生物量的积累和分配规律．结果表明：毛白杨生物量以干才占主导；6a生以前，各器官生物量分配不稳定，6～8a生以后，其分配趋势为干材＞根＞枝＞干皮＞叶；3个优良无性系每年单位面积的生物量和固定的太阳能均为对照的2～4倍；净光合效率比对照高24．41％～27．81％．并建立了各器官生物量增长的数学模型．
This paper studies the biomass increase of high quality clones of young andhalf-mature Populus tomentosa Cars.,and the accumulation and distributive law of relativebiomass in the tree parts. The results are as follows. Biomass in the stem takes the majority of the total bidmass. Before the age of 6,the,biomass distribution in tree parts is pot stable,and after the age of 6-8,the distributive tendency in tree parts is:stem biomass>rootbiomass>branch biomass>stem bark biomass>leaves biomass. The biomass and the solarenergy absorbed by the 3 high quality clones in unit area per year are 2-4 times of thoseof the control trees. The net photosynthesis efficiency of the selected clones is 24.44%- 27. 81% higher than that of the control trees. The mathematical models for biomass increase in all the tree parts are given.
出处
《中南林学院学报》
CSCD
1998年第2期14-19,共6页
Journal of Central South Forestry University
基金
河南省科技攻关项目!"毛白杨优良无性系选育与工业用材定向培育技术研究"
94105100
关键词
毛白杨
无性系
生物量
分配规律
Populus tomentosa Carr
clone
biomass
distributive law
