论文部分内容阅读
桃山林场有杨、桦天然次生林113.000多亩,为杨、桦纯林或混交林,林相整齐,生长良好,绝大部分为中令林阶段。但是多年来在抚育间伐技术中,如何根据林木不同阶段生长规律,较准确的决定单位面积上最大理论密度,抚育间伐强度,适宜保留株数,抚育间伐起始期,重复期,抚育间伐方法等技术指标没有得到很好解决,对提高杨、桦林抚育间伐质量和效果,提高科学营林水平影响极大。我们为了解决上述抚育间伐中关键性技术指标,通过对
There are 113.000 mu of natural secondary forest in Yangshan and Betula platyphylla forest, which is a kind of pure forest or mixed forest of pure birch and birch forest. The forest is well-planted and grows well, most of which is in the stage of Zhongling forest. However, in the technology of tending thinning, how to determine the maximum theoretical density per unit area, the intensity of tending thinning, the appropriate number of retained plants, the initial period of tending thinning, the repetition period and the method of tending thinning according to the growth law of different stages of tree species Did not get a good solution, to improve poplar, birch alluvial thinning quality and effectiveness, improve science and management of forest great impact. We passed in order to solve the above key technical indicators of tending thinning