影响科尔沁沙地不同林龄樟子松径向生长的关键气候因子

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中图分类号：Q948 文献标识码：A 文章编号：1000-3142（2025）08-1405-10

Abstract：Toidentifythekeytemperatureandprecipitation factorsinfluencing thegrowthofPinussylvestris var. mongolica at diferent standages，this study focused on middle-aged（33a），mature（48a），and overmature（64 a） （204号 P .sylvestris var.mongolicastandsin Zhanggutai，Liaoning Province，andanalyzed the growth patterns（basal area increment，BAI）of these stands during 2003-2022 .Inaddition，the Climwin model was used to determine the temperatureand precipitationseasonal windows withthe strongest influence on growth at different stand ages.The results were as follows：（1）The BAI of the three stands significantly increased from 2003 to 2022.（2）The current JulyAugust mean temperature had the strongest influence on the growth of middle-aged stand.When the July - August mean temperature reached 23.7 ΔC ，the growth-climate relationship of middle-aged stand turned from positive to negative; precipitation from last November to current May showed the strongest impactonboth middle-agedand mature stands.The thresholdsofprecipitationat whichthegrowth-climaterelationshipof midle-agedand maturestandsshifted frompositive to negative were 124 mmand122 mm，respectively.（3）Temperaturehadno significant impacton the growthof mature stand;conversely，thetemperatureinthecurrent Julyandthe precipitation fromlast August tocurrent Maywere significantlypositivelycorelated withthegrowthofovermaturestand.（4）Precipitation was proved tobemore important than temperature across all stand ages，with its relative importance increasing as the stands aged.Therefore，inthe context of a warming and drying climate trend，developing forest management strategies that consider water balance and varywith stand age will facilitate the growth of P .sylvestrisvar.mongolicaplantations.

Key words：Pinus sylvestris var. mongolica，growth-climate relationship，key climate factors，seasonal window，stand age difference

樟子松（Pinus sylvestrisvar.mongolica）是我国北方干旱半干旱沙地主要的防风固沙树种，在生态恢复、固碳增汇和改善社会宜居环境方面贡献突出（朱教君和郑晓，2019）。（剩余19236字）