摘要
以培育马尾松大径材为目标,通过间伐套种火力楠进行马尾松人工林改造试验,对5年后形成的针阔异龄复层林进行测定,结果表明:套种火力楠能促进马尾松大径材培育,其树高、胸径、单株材积分别达18.9 m、28 cm、0.520 m^(3),与未改造林分相比分别提高8%、11.6%、36.4%。而马尾松林冠形成的0.4~0.5郁闭度,为火力楠幼龄期提供良好的生长环境。火力楠生长速度达到其行业标准,5年生平均胸径、树高、冠幅和单株材积分别达3.6 cm、3.5 m、1.1 m和0.0019 m^(3)。不同坡位对火力楠的树高、胸径影响较大,差异显著;对冠幅影响不大,差异不显著。火力楠是马尾松纯林向异龄复层混交林转型的理想过渡树种。
In order to cultivate large-diameter timber of Pinus massoniana,the transformation experiment of P.massoniana plantation was carried out by thinning and intercropping Michelia macclurei,and coniferous and broad-leaved uneven-aged mixed forest formed after 5 years was measured.The results showed that interplanting M.macclurei could promote the cultivation of large-diameter timber of P.massoniana.The tree height,DBH and individual volume reached 18.9 m,28 cm and 0.520 m^(3),respectively,which were 8%,11.6%and 36.4%higher than those of the unmodified stands.The 0.4-0.5 density formed by P.massoniana canopy provided a good growth environment for M.macclurei in its young stage.The growth rate of M.macclurei reached its industry standard.The average DBH,tree height,crown width and individual volume of five-year-old M.macclurei reached 3.6 cm,3.5 m,1.1 m and 0.0019 m^(3),respectively.Different slope positions had great influence on the tree height and DBH of M.macclurei,and the difference was significant.It had little effect on crown width,and the difference was not obvious.M.macclurei is an ideal transitional tree species for the transformation from pure P.massoniana forest to uneven-aged mixed forest.
作者
林华英
Lin Huaying(Shanghang County Natural Resources Bureau in Fujian Province,Longyan 364200,China)
出处
《防护林科技》
2024年第6期30-33,共4页
Protection Forest Science and Technology
关键词
马尾松
间伐套种
火力楠
改培效果
Pinus massoniana
thinning and intercropping
Michelia macclurei
transformation effect
