长白落叶松不同皆伐带宽和更新密度对人工更新生长的影响

Effect of Different Clear-cutting Band Widths and Regeneration Density of Larix olgensis Henry on the Growth of Artificial Regeneration

以黑龙江省佳木斯市孟家岗林场长白落叶松为研究对象,采用3种带宽(15 m,30 m和50 m)进行带状皆伐,在皆伐地采用5个树种(柞树、红松、胡桃楸、云杉和水曲柳)按照2 000株/hm2和3 300株/hm22种更新密度进行人工更新,研究更新幼树的成活率及苗高、地径的生长情况试验结果表明:人工更新1年后,50 m皆伐带宽成活率>30 m皆伐带宽成活率>15 m皆伐带宽成活率,2 000株/hm2更新密度下成活率大于3 300株/hm2密度;各皆伐带宽下苗高和地径的生长从大到小依次是30 m、50 m、15 m,2 000株/hm2更新密度下苗高和地径生长大于3 300株/hm2更新密度。

An experiment was clear-cutted by 3 band widths（ 15 m, 30 m and 50 m） on the Larix olgensis Henry of Meng Jiagang forest in Heilongjiang Province and artificial regenerated used 5 trees species （ Quercus mongolica Fischer ex Ledebour, Quercus mongolica Fischer ex Ledebour, Juglans mandshurica Maxim, Picea koraiensis Nakai, Fraxinus mandschuriea Rupr. ） according to density of the 2 000 and 3 300 trees/hm^2. The results under investigating and analyzing the growth of survival rate, seedling height and ground diameter show that： the survival rate 50 m 〉 30 m 〉 15 m, 2 000 trees/hm^2 〉 3 300 trees/hm^2, the growth of seedling height and ground diameter 30 m 〉 50 m 〉 15 m, 2 000 trees/hm^2 〉 3 300 trees/hm^2 after artificial regenerated 1 year.