内蒙古中西部山主要林分类型的经营关键技术及其效果分析.pdf

摘 要 本文以内蒙古中西部的大青山林场和蛮汉山林场的油松 （Pinus tabulaeformis ）人 工林、华北落叶松 （Larix principis-rupprechtii ）人工林和白桦 （Betula platyphylla ） 天然林为研究对象，借鉴国内外的研究方法和调查研究区的林分状况，运用 SAS 软件 的主成分分析法，确定出抚育改造类型，设计出抚育改造技术措施，进行了效果分析。 分析结果如下： （1）油松人工林的 30%抚育强度的平均胸径增长量为 0.6 cm；20%抚育强度的 平均树高增长量为 0.56 m；30%抚育强度的平均冠幅增长率为 37.5% ；30%抚育强度 林分单株材积生长率为 12.73%；30%抚育强度林分单位面积蓄积增长量为 22.8044 3 m 。初步分析得出，30%抚育强度的间伐措施有利于油松人工林的生长。 （2 ）华北落叶松人工林的 30%抚育强度的平均胸径增长量为 0.33cm；20%抚育 强度的平均树高增长量为 0.52 m；20%抚育强度的平均冠幅增长率为 34.56% ；30%抚 育强度林分单株材积生长率为 9.0% ；30%抚育强度林分单位面积蓄积增长量为 3 11.0377 m 。初步分析得出，30%抚育强度的间伐措施有利于华北落叶松人工林的生 长。 （3 ）其他抚育改造措施是由于抚育改造的时间短没有进行效果分析。 关键词：内蒙古中西部；油松人工林；华北落叶松人工林；白桦天然林；抚育改造 Analysis of the Key Management Technology and Its Effect of the Main Forest Types in the Mountain Area of Central and Western Inner Mongolia Abstract Pinus tabulaeformis plantation, Larix principis-rupprechtii plantation and white birch forest were chosen as investigative objects in DA QING Mountain and forestry station of MAN HAN Mountain. By referencing method at home and abroad,combining to forestry condition and using Principal component method of SAS software, the type of tending transformation was ensured and the measure which skill of was designed. Meanwhile, effect was analyzed. The result as followed: (1)The average diameter growth is 0.6cm which tending intensity is 30% about Pinus tabulaeformis plantation; the average stands heigh is 0.56m which tending intensity is 20%; the average stands crown diameter,the growth of individual volume and stands volum are 37.5%,12.73%, 22.8044 m3 respectively. The result was indicated that intermediate cutting measure of tending intensity which 30% is in favor of grow in Pinus tabulaeformis plantation. (2)