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

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.