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四种中美洲热带松种源苗期试验*

Species/Provenance Trials of Four Exotic Pines in Southern China

  • 摘要: 4种中美洲热带松台库努曼松、马克西姆松、墨西哥松和卵果松于1992年在广西、广东和福建的引种试验表明,它们的早期表现是成功的。18个月生时的总平均树高依次为1.62、1.37、1.33和1.51m,分别为对照湿地松树高1.26m的128%、108%、105%和12O%;在福建岩溪林场,这4种热带松树高分别为当地马尾松平均高0.75m的209%、162%、181%和212%.21个种源分别树种的方差分析表明,各自的种源间在高生长上都存在着显着差异。种源内个体间的变异范围较大,不同种源的个体变异幅度为8.8%~39.9%.

     

    Abstract: This paper reports the preliminary results of species/provenance trials established in Guangdong,Guangxi and Fujian Provinces in southern China in 1992,with 4 tropical pine species and 21 provenances which were introduced from Central America. It was found that all the species appeared to be adaptable to the local ecological conditions and significant differences existed in growth rates between and within species. Tree heights of Pinus patula var. tecunumanii,P. oocarpa,P. maximinoii and P. patula were ranked in descending order,reaching 1.62 m,1.51 m,1.37 m and 1.33 m, respectively, at 18-month age. All the four species were 5%~28% faster in height growth than a local land-race of P. elliottii used as a check lot in the trials and 62%~112% higher than that of P. massoniana,an indigenous species,on a site in Fujian Province. The trials need to be further monitored before a conclusion could be made.

     

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