文献类型：期刊文献

中文题名：不同林龄蓝花楹林内小气候对比

英文题名：Comparison of microclimate in Jacaranda mimosifolia plantations of different stand ages

作者：雷锦富[1] 刘学锋[2] 游文燕[1] 李小梅[1] 张学展[1] 王浩林[1]

第一作者：雷锦富

机构：[1]湛江科技学院,广东湛江524000;[2]中国林业科学研究院速生树木研究所,广东湛江524022

年份：2026

卷号：43

期号：1

起止页码：69-78

中文期刊名：桉树科技

外文期刊名：Eucalypt Science & Technology

基金：广东省林业科技创新项目(2023KJCX014)。

语种：中文

中文关键词：蓝花楹人工林;小气候;林龄

外文关键词：Jacaranda mimosifolia plantation;microclimate;stand age

分类号：S685.99;S716.3

摘要：以不同林龄的蓝花楹(Jacaranda mimosifolia)人工林为研究对象,通过测定林内小气候因子、林分结构及林下植被生物量,探讨两种林龄蓝花楹人工林主要气候要素的差异及其影响因素。结果表明:蓝花楹幼林与成林在树高、平均冠幅、胸径、冠高和郁闭度等方面差异显著(P<0.05),成林的各项指标均高于幼林,而枝下高无显著差异。在林下植被方面,幼林以草本植物为主,木本植物较少或受到抑制,而成林的林下植被物种多样性更高,结构更复杂。小气候分析显示,幼林对太阳辐射、温度和湿度等因子的变化较敏感,而成林的小气候较为稳定,受外界环境影响较小。林分结构(如树高、冠幅)显著影响小气候特征,且小气候因子间存在相互作用,共同塑造不同林龄蓝花楹人工林的微环境特征。成林的植被物种丰富度和重要值高于幼林,以灌木和藤本植物为主,而幼林以草本植物占主导;幼林较低的郁闭度导致林下太阳辐射和温度较高,从而影响了植被物种多样性。
Taking Jacaranda mimosifolia plantations of different stand ages as the research objects,by measuring the microclimate factors,stand structure and understory vegetation biomass in the forests,the differences in the main climatic elements of J.mimosifolia plantations of two stand ages and their influencing factors were explored.The results showed that significant differences(P<0.05)existed between young and mature plantationts in terms of tree height,mean crown width,diameter at breast height(DBH),crown height,and canopy density,with mature plantationts exhibiting higher values in all these indicators,while no significant difference was found in height under branches.In terms of understory vegetation,young plantationts were dominated by herbaceous plants,with woody plants being scarce or suppressed,whereas mature plantationts displayed higher species diversity and more complex vegetation structure.Microclimate analysis indicated that young plantationts were more sensitive to variations in solar radiation,temperature,and humidity,while mature forests maintain a more stable microclimate,less affected by external environmental conditions.Stand structure(such as tree height and crown width)significantly influenced microclimatic characteristics,and interactions among microclimatic factors collectively shape the microenvironment of J.mimosifolia plantations at different ages.Mature plantations exhibited higher species richness and importance values in understory vegetation,dominated by shrubs and lianas,whereas young plantations were mainly dominated by herbaceous plants.The lower canopy density in young plantations led to higher understory solar radiation and temperature,thereby affecting vegetation species diversity.