从琅岐岛滨海沙丘朴树群落特征探讨福建沿海防护林更新与改造问题

ASPECTS OF REFTRESHMENT AND REMAKE ON THE COASTAL SHEL TER-FOREST IN FUJIAN PROVINCE BASED ON THE CHARACTERISTICS OF CELTIC TETRANDRA VAR SINENSIS COMMUNITY ON COASTAL DUNE IN LANGGI ISLAND

本文对福州郊区琅歧岛朴树群落进行了全面调查，并分析了朴树群落的种类组成、区系成分、群落结构和生活型组成等群落特征。同时．将琅歧岛朴树群落下土用性质与平潭县芦洋农场木麻黄林下土壤性质做了比较分析。在此基础上，提出福建沿海防护林更新与改造的具体意见。研究认为：①朴树在福建滨海风沙土上种植是可行的；②朴树与木麻黄混交种植，将会减轻木麻黄的病虫害，提高木麻黄林下土壤有机质，减轻木麻黄林下土壤酸化．改香土壤结构．缓解木麻黄退化的危机，增强木麻黄防风固沙效能，以保证福建沿海生态环境的优化和稳定。

n all-round investigation was made on the Celtic tetrandra var .siensis community in Langgi island in Fuzhou suburbs with an analysis for the characteristics of the community,such as the species composition, flora components ,community structure and life forms. Theproperties of soil under the community was compared with thoes under a Casuarina equiseti-folia forest in the Luyang farm in Pingtan island, Fujian. On this basis, some concrete sug-gestions were set forth on the refreshment and remarke of the coastal shelter-forest in Fujianprovince,The results showed that it is feasible to plant the species of tree studied in thecoastal sandy-earth in Fujian; A mixed plantation of Celtic tetrandra var. sinensis with Ca-suarina equisetlfolia can alleviate the pest in C. equisetifolia ,increase the content of Organicmatter in the soil under the C. equisetifolia forest with a reduced level of soil acidificationand an improved soil structure, and thus mitigate the crisis of C. equisetifloia degeneration,enhancing its utility in wind shetter and sand fixation to ensure the ecological and environ-mental optimization and stabilition in the coastal Fujian province.