论文部分内容阅读
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．
Relative growth method was used to study the biomass accumulation and distribution of the superior clones of young and middle aged Populus tomentosa and their relative biomass. The results showed that biomass of Populus tomentosa dominated predominantly. Before the 6th birthday, the biomass allocation of each organ was not stable. After 6 ~ 8a, the distribution trend was dry wood> root> branch> dry skins> The annual biomass per unit area and the fixed solar energy of clones were 2-4 times of that of the control, and the net photosynthetic efficiency was 24.41% -27.81% higher than the control. And established a mathematical model of organ biomass growth.