柳杉人工林生物量的测定
柳杉人工林生物量的测定
四川农业大学林学系
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Sichuan Agricultural University
摘要
摘要: 柳杉(Cryptomeria fortunei Hooibrenk ex Otto et Dietr.)是四川省用材林基地主要造林树种之一。洪雅县国营林场自1959年以来成片栽植柳杉获得成功。目前,人工柳杉林普遍生长良好,并且在该场现存的11万亩人工林中占有相当大的比重。
Abstract: The data of 20 sample trees, obtained from the artifical Chinese Crypto-meria (Cryptomeria fortunei Hooibrenk ex Otto et Dietr.) stand of intermediate site in Hongya County of Sichuan Province, were analyzed to find out the quantitative relation between the dry weight of tree components and D. B. H,, or between D, B# and the total height. The prediction equations for estimating the dry weight of stem, foliage plus branchwood and root for an individual tree of Cryptomeria fortunei were put forward. By using these equations, we estimated the total stand weight of the components and biomass in 16-to-lS-Year-old Cryptomeria fortunei stand, and the result showed that the boimass and net production of arbor layer in the stand were 123.3-133.5 ton/ha and 7.71-7.42 ton/ha, yr respectively. The data have shown that the biological productivity of Cryptomeria fortunei stand is equivalent to that in Cryptomeria japonica stand at the same age in Japan.
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