湖山林场赤杨叶人工林的径级结构和空间分布格局研究

Diameter Class Structure and Spatial Distribution Pattern of Alniphyllum fortunei Plantation in Hushan Forest Farm

摘要: 2016 年8 月，采用固定样地调查的方法，在遂昌湖山林场的赤杨叶Alniphyllum fortunei 人工林中建立1 个50 m×50 m 的监测样地，并进行了乔木层调查。结果表明：（1）共记录到乔木树种4 种，分别为赤杨叶、杉木Cunninghamia lanceolata，黄檀Dalbergia hupeana 和青冈Cyclobalanopsis glauca。（2）从空间分布看，该样地林分的混交程度较差，林木分化不明显，林分呈现均匀分布。（3）通过分析环境因子对赤杨叶胸径生长的影响，发现样地内只有土层厚度对赤杨叶的生长有显著影响（P<0.01）。为了促进遂昌湖山林场赤杨叶人工林的生长，本文认为该林分需要及时进行密度调控，并注意加强土壤管理。

Abstract: In August 2016, one permanent sample plot of 50 × 50 m was established at Alniphyllum fortunei plantation of Suichang Hushan Forest Farm, Zhejiang province. Complete enumeration was implemented at tree layer. The results showed that there were 4 tree species, such as A. fortunei, Cunninghamia lanceolate, Dalbergia hupeana, Cyclobalanopsis glauca. The stand was uniform distribution with low mixed degree. Analysis of environment factors demonstrated that soil layer thickness had evident effect on DBH growth of A. fortune. The investigation concluded that density of the plantation should be decreased and soil management be strengthened.