抚育间伐对沙地樟子松人工林生长的影响

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中图分类号：S781.253;S753.51 文献标识码：A doi：10.13601/j.issn.1005—5215.2025.06.002

Effects Tending Thinning on the Growth Pinus sylvestris var. mongolica Plantations in Sy L

Han Zhaorigetu1 ，Bai Yurong1* ，Bao Baoshan²，Wang Lijun1，Shang Yu1，Lan Kuiwei1 （1. l ， ， 2. l ， O21oo8，）

AbstractPinus syluestris var.mongholica is a native species in also one the pioneer species for windbreak s fixation inthe Three-North region.Taking 2O-year-old artificialPinus syuestris var.mongholica forests as the research object，this study investigated the changes in st growth between thined unthined artificial Pinus syluestris var.mongholica forests，explored the effects tending thining measures as wel as diferent thinning intensities on tre growth fruiting.The results showed that different thinning intensities had extremely significant effects on the average DBH，crown width，individual tree volume，understory vegetation，st volume， fruiting the st （ P<0.01⟩ . The growth degree varied under different thinning intensities，showing obvious diferences.Thinning intensity was positively corelated with DBH，crown width，individual tree volume， fruiting， understory vegetation，but negatively correlated with st volume.Tending thinning can promote st growth improve st structure.Through comparative analysis different thining intensities，it is appropriate to adopt a moderate thinning intensity （50% ） for the sts in the experimental area.

Key words Pinus sylvestris var. mongolica ; plantation;tending thinning;st growth

森林是陆地生态系统的主体，是“四库”一身功能最完善的资源库，具有调节气候、防风固沙、保持水土、涵养水源、吸收大气污染物等生态效益，也可为人类提供较大的经济效益[1-2]。（剩余6310字）