沼泽地人工落叶松林采伐迹地更新技术的研究

沼泽地人工落叶松林采伐迹地更新试验结果表明：人工落叶松林采伐迹地更新的水曲柳、云杉的生长量,成活率,保存率与山地更新的水曲柳、云杉林无显著差异。沼泽地人工落叶松林更新的四个树种的3 a保存率均大于80%以上,全部达到合格标准。林龄5 a时,白桦、毛赤杨生长稳定,并且郁闭成林。林龄20 a时,白桦平均高达11.5 m,胸径达11.6 cm;毛赤杨平均高达11.5 m,胸径达13.1 cm;水曲柳平均高达10.5 m,胸径达10.5 cm;云杉平均高达9.5 m,胸径达12.0 cm。

Study on cutting-blank renewal technology of artificial Larch swamp forest

The results of cutting-blank renewal experiment of artificial larch swamp forest showed： the grouth,survival rate and preserving rate ofFraxinus mandshurica and Picea asperatahad birch in artificiad laech no significant difference from mountain land.The four species＇s 3 a preserving rate which reached the qualified standar.were more than 80%.Birch and Alnus sibirica with 5-year stand age were stable growth,also had closed and doing well.After 20 years,the average DBH of white birtch was 11.6 cm,the average height was 10.5 m.;the average DBH of Alnus sibiricais was 13.1 cm,the average height was 11.5 m.;the average DBH of Fraxinus mandshurica was 10.5 cm,the average height was 10.5 m.;the average DBH of Picea asperatawas 12.0 cm,the average height was 9.5 m.