辽东山区次生低产低效林改造试验

Transformation Experiments of Secondary Forest of Low-Yield and Low-Efficiency in Eastern Mountains in Liaoning Province

根据辽东山区次生林现状,分析了辽东次生林存在的低产低效的原因,并针对所存在的问题,进行了次生低效林的复层改育、整体改育、局部改造和目标树抚育择代等4种措施的改造试验,结果表明低效林复层改育类型,10年生红松树高生长量为2.2-2.5m、胸径2.0-2.8cm.;整体改育类型,树高和胸径生长量分别为3.2-3.5m 和2.9-3.3cm;局部改造类型,5年生落叶松树高和胸径生长量分别为3.4-3.6m 和3.5-3.8cm.

According to the current situation of secondary forest in eastern mountain of Liaoning Province,the rea-sons of causing secondary forest of low-yield and low-efficiency in eastern mountains of Liaoning Province were ana-lyzed.Based on the existed problems,transformation experiments of four measures (improved nursery on complex storey,overall improved nursery,local transformation and selection cutting of target trees)were conducted.Result shows that the height growth and DBH of low-efficiency forest of 10-year-old Pinuskoraiensis is in the range of 2.2-2.5 m and 2.0-2.8 cm respectively by using improved nursery on complex storey;the tree height &growth of DBH is respectively 3.2-3.5 m and 2.9-3.3 cm by using overall improved nursery ;the tree height & growth of DBH 5-year-old larch is respectively 3.4-3.6 m and 3.5-3.8 cm by using local transformation .