Crown Biomass and structure Analysis ofCalocedrus formosana and Cryptomeria japonica

• Main Authors: Yen-Hsin Tsai, 蔡彥新
• Other Authors: Shu-Tzong Lin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/31873512108265630563

碩士 === 國立宜蘭大學 === 自然資源學系碩士班 === 99 === The analysis of crown structure in the leaf biomass and non-assimilation tissue, and the relationship between canopy leaf efficiency, discussion Specific pipe length and pip model is affected by tree species, stand and tree size . In the research, three different crown class in six Calocedrus formosana plots and the six Cryptomeria japonica of different crown class in one plot , total twenty-four trees, to investigate from the top of the tree to the base of crown and analysis of the amount of leaves and branches of the weight of the base, branches diameter , branch length and branch diameter squared, and the layers of accumulated amount of their non-assimilation of leaf tissue density of the distribution patterns. From the top of the tree to the leaf at the base crown volume of branches with each branch trait parameters (branch weight, branch diameter and branch diameter squared) showed a quadratic relationship. To the top of the tree canopy and base layers of accumulated leaf and non- assimilation organs density (non-assimilation tissue weight, trunk diameter and trunk diameter squared), it all showed a significant linear relationship. The best linear relationship between the accumulated leaf biomass and square of stem diameter of ratio. Analysis of covariance showed Calocedrus formosana and Cryptomeria japonica has a specific Specific pipe length, because tree growth since the beginning may the Calocedrus formosana stand in different conditions so that the amount of accumulated leaf tissue density and the ratio of non-assimilation tubes not same slope. In the Calocedrus formosana stand, accumulated between the layers of leaves and their non-assimilation of the amount of tissue weight equal to the ratio of the slope of the performance of Specific pipe length. The other between the layers in the Cryptomeria japonica sample with trunk diameter of the amount of accumulated leaves, sapwood area ratio of Specific Pipe Length does not have such a same slope. Relatively high in different branches of the tree and its branches on the leaf weight ratio characteristics of crown structure , the more close to the top of the tree the greater the ratio of foliage mass and branch, down the rapid decrease in the ratio of crown base the lowest relative. It response different tree leaves with high efficiency of different light conditions.