论文部分内容阅读
七十年代以来,南方各省营造了大量的杉木用材林,现正处在快速生长阶段,有的急需采取抚育间伐措施。为适应生产上的需要,及早摸索研究出一套适合本省丘陵地区杉木林抚育间伐的方法和技术措施,浙江林学院于1976年和1978年先后在临安县横畈林场进行了杉木林的抚育间伐试验。经连续十年的定点定位的试验研究结果表明:间伐能明显地提高胸径生
Since the 1970s, a large number of fir timber forests have been created in all the southern provinces, and are now in a period of rapid growth. Some are in urgent need of tending and thinning measures. In order to meet the needs of production, as soon as possible to explore a set of suitable for the foothills of the fir forest tending thinning method and technical measures, Zhejiang Forestry College in successively in 1978 and 1978 in Lin’an Hengzhang Forestry Center fir fir thinning thinning test. After ten consecutive years of fixed-point positioning test results show that: thinning can significantly improve the DBH