摘要
对贵州遵义、湖南慈利２６～２７年生杜仲人工林进行２ａ的生物量研究，调查标准地２０块，测定样木８０株，叶面积７１组。研究结果表明，立地条件好的大于立地条件差的生物量；相同立地条件下，干、枝生物量比例随年龄增大而增加，叶、根生物量下降，而皮的生物量却保持较为恒定的比例，其中根皮量可占总皮量３０％左右，采伐更新时应加以利用；同一林分中，生物量最大的为优势木，其次为中级木，最小的为被压木。通过林分密度调控和选择适宜的立地条件，以提高叶面积指数，是提高杜仲生产力的重要途径；建立的杜仲单株各器官生物量的回归方程，可供生产中应用。
Studies on the biomass of Eucommia ulmoides Plantation of 2 6～2 7 years oldwere
conducted in Zunyi, Guizhou Province and Cili, Hunan Province with 20 plots, 80 sam-pling
trees and 71 leaf-surface groups. The results show that the biomass of a stand on agood site
is greater than that of another on a poorer site and that on the same site condition,the trunk and
branch biomass ratio increases with the increase of age, but the leaf and rootbiomass
decreases with the increase of age, and the bark biomass keeps more stable. Theroot′s
cuticle is some 30%of the total and it can be utilized after cutting. In the same stand,the
dominant tree has the maximum biomass, the middle ones the second and the
suppressedones the minimum,controlling the density of the stand and choosing the suitable
site for cul-tivation are the two important measures to increase the yield of Eucommia
ulmoides.Besides,the establishment of regression equation for each nutritions organ′s
biomass of individual treecan be used in practical production.
出处
《林业科学研究》
CSCD
北大核心
1994年第6期646-651,共6页
Forest Research
关键词
杜仲
人工林
生物量
生产力
Eucommia ulmoides
plantation, biomass, productivity
