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树木引种前对树种的生物学、生态学特性及引种地的自然环境条件应有所了解,进行全面地分析证论,找出引种的有利条件和不利因素,才能有依据预测其引种前途,这对多年生树木的引种尤为重要.湿地松(Pinus elliottii Engelm)火炬松(Pinus taeda L),原产于美国东南部,素以主干高大通直、生长快、材质好、适应性强和含脂丰富而著称,广为亚热带地区国家所引种.我国于本世纪三十年代起在南方一些省份进行过小量引种,均因管理不善而保存
Before the introduction of trees, the biological and ecological characteristics of tree species and the natural environmental conditions of the introduced areas should be well understood. It is necessary to analyze the evidence comprehensively and identify the favorable conditions and unfavorable factors of introduction so as to predict the introduction prospects of the trees. Pinus elliottii Engelm Pinus taeda L., native to the southeastern United States, is known for its high trunk height, fast growth, good material, high adaptability and fat-rich Known for being widely introduced in countries in the subtropical region since the 1930s in China in some provinces in the southern part of the introduction of a small amount, due to poor management and preservation