丹凤县油松飞播林间伐后胸径结构和蓄积变化初探  

The Volume and DBH Variation after Thinning in Aerial Seeded Forest of Pinus tabulaeformis in Danfeng County of Shaanxi

作　　者：卢永民 寇瑛楠 赵栋梁 黄维 李卫忠[3] LU Yong-min;KOU Ying-nan;ZNAO Dong-liang;HUANG Wei;LI Wei-zhong(Liuling State-owned forest farm, Danfeng, Shaanxi 726000;Work Station for Surrounding City Greening of Shangzhou, Shangzhou, Shaanxi 726000;College of forestry, Northwest A&F University, Yangling, Shaanxi 712100)

机构地区：[1]丹凤县国有流岭林场,陕西丹凤726000 [2]商州市商州区城周绿化工作站,陕西商州726000 [3]西北农林科技大学林学院,陕西杨凌712100

出　　处：《陕西林业科技》2020年第2期22-26,共5页Shaanxi Forest Science and Technology

基　　金：陕西省林业科学研究重大项目(SXLY-2018-02)。

摘　　要：本文以丹凤县1975年飞播的油松林为对象,研究不同间伐强度(4个梯度)间伐前及间伐6年后,油松蓄积量和直径结构的变化规律,结果表明:(1)与对照相比,间伐后的油松飞播林生长状况、林分内部竞争等都有显著的改善;(2)在株数间伐强度为50%时,林分内的竞争及生长状况达到最优;(3)当以50%的强度开展森林抚育时,抚育间隔期应控制在5年以上;(4)初始林分密度对经营效果有显著影响,因此,在确定抚育间伐强度时,应充分考虑林分初始密度。Aerial seeded forest in 1975 at Danfeng was the research subject and their growing before thinning and 6 years after thinning(four thinning intensities applied)were observed.The result showed that 1)the stands after thinning performe better in growth and inter-stand competition in comparison with stands before thinning;2)the stands after thinning intensity at 50%performe extremely well in inter-stand competition and growth;3)when thinning intensity is at 50%,the interval period for tending is expected to be 5years or above;4)initial density of stand has an impact on the management effect,indicating that the initial density should be considered in the calculation of thinning intensity.

关 键 词：飞播林 胸径结构 蓄积变化 间伐 油松 

分 类 号：S753.5[农业科学—森林经理学]