冀北山地油松人工林群落碳密度随林龄的动态变化

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关键词油松人工林;林龄；生物量；碳密度；年固碳量中图分类号S718.54文献标识码A文章编号 0517-6611（2025）13-0100-04doi ： 10.3969/j . issn. 0517-6611.2025.13. 019

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Carbon Density inanAge-sequence of Pinus tabuliformis Plantations inMountainous Areas of Northern Hebei Provin（ YOUHai-zhou，WANG Chao（Hebei Academy of Forestry and Grassand Science，Shijiazhuang，Hebei 050061）

AbstractThepresentdysedthabodnstingeseqecofinutbulfoisplantiossedoneoassestig tionof64samplingplotsinmountaousaeasoforteHbeiProvince.Tediferenceinthealoatiooftreoanbomassaificant，whereasthelativecontributioofstemiomasstototaltreebomassincreasdwithstandage.Basedontheuitareacclation V= （204号 13m3/hm2 ，asegmented biomassestimationmodel was established toimprove the estimation accuracy.The carbon measurement parameters werereasonableinstepsandadasgfcantcorelationwittesaeplantatoage.TheBEFadBCEFvaluesdreasdalongtehon sequence ， while the R and WD values remain relatively stable.The carbon density of the P tabuliformis plantation increased with stand age， ranging from 5. 640 to 61. . The carbon density of different layers was as follows：tree layer （ ） > litter layer （2 （0.887t/hm2） > understory vegetation layer （0.522Vhm2 ）. The carbon sequestration of community and tree layer was fast in the early stagoflantation，andthensloweddow，andthenincreasedastheplntationagedThehighestaualcarbonsequestrationofcomnity and tree layer occurred at 26-30 years old，with the value of 4.669 and 4.658V（hm2⋅a） ，respectively. Mature plantations aged from 41 to 48yearssilldigarbsequestrationpotetial，ilealarbonsqustatioothrlaes（udestoygetatiodler layer） is relatively low，ranging from 0.012 to 0.158V（hm2⋅a） ：

Key WordsPinus tabuliformis plantation;Stand age;Biomass;Carbon intensity;Annual carbonsequestration

油松（Pinustabuliformis），耐干旱瘠薄，是华北山地森林的主要建群种，有良好的保持水土、涵养水源及改良土壤的作用，是华北山地的地带性植被，也是冀北山地人工造林的主要树种。（剩余8126字）