论文部分内容阅读
为了提高森林经营强度,需要不断地、定期地、合理地对林分进行抚育间伐。及时调整林分密度,改善林分的生长条件,保持林分良好的结构,提高林分生产力,缩短培育期,并获得中间利用。目前抚育采伐工作已经由以生长发育构成的树型级为基础,把注意力放在林木分级和采伐木选择上的定性间伐,逐渐过渡到根据生态学和测树学的原理,对主伐前的整个生产期间立木株数进行调节的定量间伐阶段。用编制各种间伐标准
In order to improve the intensity of forest management, it is necessary to continuously, regularly and reasonably reforestation. Timely adjust the stand density, improve stand growth conditions, maintain good stand structure, improve stand productivity, shorten the incubation period, and access to intermediate use. At present, the tending and logging work has been based on the tree level which is composed of the growth and development. Attention is paid to the qualitative thinning on the tree classification and the selection of harvesting logs, and the gradual transition to the principle of ecology and tree- During the entire production period stand number of quantitative regulation of the thinning stage. Use a variety of thinning standards