日本落叶松人工林心腐率的调查

摘要

Heart rot of Larix kaempferi above 40-year-old were investigated .Result shows that :root rot of Larix kaempferi will become increasingly serious with the increase of forest age ;heart rot rate of 40 ,50 & 60-year-old Larix kaempferi are 39% ,69% ,84% ,respectively ;influence of heart rot on the growth of Larix kaempferi is great ;growth of tree height & diameter decrease significantly ;the quality & value of trees were seriously affected . Therefore ,final felling regeneration should be conducted on Larix kaempferi with more tree rings to avoid huge los-ses by too sever heart rot to the economy .%通过对40年生以上的日本落叶松（Larix kaempferi）人工林心腐的调查研究，结果表明，日本落叶松随林龄的增长，根部腐朽会越来越重，40年时腐蚀率达39％，50年达69％，60年达84％。心腐对日本落叶松的生长影响很大，树高和胸径生长量明显下降，同时也严重地影响林木的质量和产值。所以，对林龄较大的日本落叶松应及时主伐更新，避免因心腐过重给经济带来巨大的损失。