12年定位监测下疏伐对半干旱区落叶松人工林生长与生态功能的影响

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中图分类号 S756.4 文献标志码A 文章编号 1007-7731（2026）05-0049-04

DOI号 10.16377/j.cnki.issn1007-7731.2026.05.012

Effects of thinning on growth and ecological functions in Larix gmelinii plantations in semi-arid regionsunder 12-year positioning monitoring

Ding Nan1Sun Yingjie1Wang Xuesong1Zheng Chunbo1Zhao Ou1 Cui Xiaohui1A Latantuya 1，2 Wang Yuanlin1Gao Ge1Yu Fenglong³Yang Yuhong1 （ 1 Chifeng Forestry Science Research Institute， Chifeng O24000， China; （20 2 Chifeng Forest Ecosystem Positioning Observation and Research Station，Chifeng O2400， China; 3Hexigten Banner Forestry and Grassand Bureau， Hexigten Banner O2535o， China）

AbstractTo explore the efects of thinning measureson the growthand ecosystem functions of Larix gmelini artificial forests insemi-aridregions，the Larix gmeliniiprotective forests inWangyedian forestfarms in Chifeng City， Inner Mongolia were selected as the research objects.2 treatments were setup： thinning treatment （T1）and no managementcontrol（CK）.Through12yearsoflong-term monitoring，the growth indicatorsoftrees，forest standvolume， andbiodiversityand other indicators were systematically analyzed.Theresults showed that thinning significantly promoted thegrowth of trees.The diameterat breast height （17.15cm）and tree height （16.43m）ofT1 treatment were （2 31.92% and 19.32% higher than those of the CK treatment，respectively.The stand volume （242.44m3/hm2 ）of T1 treatment was 51.96% higher than that of the CK treatment. The Simpson index （1.O0 for shrubs and O.85 for herbaceous plants）and Shannon-Wiener index （1.31for shrubs and 2.O1 for herbaceous plants）of the understory vegetation under T1 treatment were significantly higher than those of the CK treatment.The ecosystem service value was significantly improved，and the annual carbonsequestration value （156OO yuan）and oxygen release value （216OOO yuan）increased by 38.05% and 38.36% ，respectively，compared with the CK treatment.In summary， moderate thinning can optimize the stand structureof Larix gmelinii artificial forests insemi-arid regions，enhance wood productionandecological service functions，and isanefective way toachieve near-natural management.Thispaper providesareference for the nearnatural management of regional artificial forests.

Keywordsthinning; Larix gmelini; tree growth; stand productivity; carbon sequestration and oxygen release

落叶松（Larixgmelinii）是暖温带地区典型的先锋树种，具有较强的速生性与环境适应性，其年均树高生长量在 0.8～1.2m ，能耐受 -40°C 极端低温[1-2]。（剩余5616字）