摘要
沙地樟子松(Pinus sylvestris var.mongholica)是呼伦贝尔乡土树种,也是三北地区防风固沙先锋树种之一。以20 a沙地樟子松人工林为研究对象,调查沙地樟子松人工林间伐后和未间伐的林分生长变化,探讨抚育间伐措施以及不同间伐强度对林木生长及结实的影响。结果表明:不同间伐强度对林分的平均胸径、冠幅、单株材积、林下植被、林分蓄积量和结实均存在极显著影响(P<0.01),不同间伐强度下其增长程度也各不相同,具有明显差异;间伐强度与其胸径、冠幅、单株材积、结实和林下植被存在正相关关系,但与其林分蓄积量存在负相关关系。抚育间伐可以促进林分的生长,改善林分结构,通过不同间伐强度之间对比分析,试验区林分应采用中度间伐强度(50%)为宜。
Pinus sylvestris var.mongholica is a native species in Hulunbuir and also one of the pioneer species for windbreak and sand fixation in the Three-North region.Taking 20-year-old artificial Pinus sylvestris var.mongholica forests as the research object,this study investigated the changes in stand growth between thinned and unthinned artificial Pinus sylvestris var.mongholica forests,and explored the effects of tending and thinning measures as well as different thinning intensities on tree growth and fruiting.The results showed that different thinning intensities had extremely significant effects on the average DBH,crown width,individual tree volume,understory vegetation,stand volume,and fruiting of the stand(P<0.01).The growth degree varied under different thinning intensities,showing obvious differences.Thinning intensity was positively correlated with DBH,crown width,individual tree volume,fruiting,and understory vegetation,but negatively correlated with stand volume.Tending and thinning can promote stand growth and improve stand structure.Through comparative analysis of different thinning intensities,it is appropriate to adopt a moderate thinning intensity(50%)for the stands in the experimental area.
作者
韩照日格图
白玉荣
包宝山
王立军
商宇
兰魁伟
Han Zhaorigetu;Bai Yurong;Bao Baoshan;Wang Lijun;Shang Yu;Lan Kuiwei(Hulunbuir Institute of Forestry and Grassland Science,Hulunbuir 021008,China;Hulunbuir Forestry and Grassland Development Center,Hulunbuir 021008,China)
出处
《防护林科技》
2025年第6期10-13,共4页
Protection Forest Science and Technology
基金
呼伦贝尔市科技计划项目“沙地樟子松人工林改造成母树林的关键技术研究”。
关键词
樟子松
人工林
抚育间伐
林分生长
Pinus sylvestris var.mongolica
plantation
tending and thinning
stand growth
