发展速生树种定向培育工业用材林的研究

Study on development of fast growing species and directed cultivation of industrial timber stands

对我省３０ａ以下人工更新的大青杨、香杨、红松人工林的生长量进行实际调查，结果表明，２７ａ生时胸径为７．５ｃｍ。对落叶松进行定向培育，在皆伐迹地二次人工造林，实行短轮伐作业，生长效果显著。最佳造林密度为３３００株／ｈｍ２。

Growth investigation of Populus ussuriensis and P. koreana and Pinus. koraiensis artificial forest less than 30 year old showed that the breast diameter reached 7.5cm at 27 year old. The directed cultivation, second afforestation on the clear cutting land, short cutting rotation improved the growth significantly. The optimum density was 3 300 stocks/hm2