造林密度和混交比例对水曲柳生长形质及空间利用能力的影响  

Effects of planting density and mixed proportion on growth form quality and spatial utilization ability of Fraxinus mandshurica

作　　者：肖伟伟 王龙凤 王树力[1] Xiao Weiwei;Wang Longfeng;Wang Shuli(School of Forestry,Northeast Forestry University,Harbin 150040,Heilongjiang,China)

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《北京林业大学学报》2024年第3期60-68,共9页Journal of Beijing Forestry University

基　　金：中央高校基本科研业务费专项(2572020DR04);国家重点研发计划(2017YFD0601103);黑龙江省省级财政林业科研专项(201522)。

摘　　要：【目的】探究不同造林密度和混交比例下水曲柳生长形质及空间利用能力的变化规律,为培养大径材水曲柳人工林提供理论依据。【方法】选择帽儿山林场1998年营造的4种不同造林密度(分别为10000、4400、2500和2200株/hm^(2))的水曲柳纯林以及两种不同混交行数比(分别为1∶1和3∶3)、造林密度为2500株/hm^(2)的长白落叶松-水曲柳混交林作为研究对象,调查了水曲柳的生长指标、形质指标和空间利用能力指标,运用改进层级分析法获得综合评价值。【结果】4400株/hm^(2)、10000株/hm^(2)纯林中水曲柳生长指标评价值和空间利用能力评价值比2500株/hm^(2)纯林分别降低3.15%、2.58%和8.62%、2.58%,2200株/hm^(2)纯林中水曲柳生长指标评价值、形质指标评价值和空间利用能力指标评价值分别比2500株/hm^(2)纯林提高21.89%、7.41%和2.94%。混交行数比1∶1和3∶3长白落叶松-水曲柳混交林生长指标评价值、形质指标评价值和空间利用能力指标评价值分别比2500株/hm^(2)纯林提高12.18%、9.05%、17.92%和22.98%、12.14%、25.77%。水曲柳综合评价值从大到小为混交行数比3∶3长白落叶松-水曲柳混交林、2200株/hm^(2)纯林、混交行数1∶1长白落叶松-水曲柳混交林、2500株/hm^(2)纯林、4400株/hm^(2)纯林和10000株/hm^(2)纯林。【结论】随着造林密度的降低纯林水曲柳个体质量显著提高,混交林能显著提高水曲柳个体质量,建议营造密度为2500株/hm^(2)混交行数比为3∶3的长白落叶松-水曲柳混交林。[Objective]By exploring the changing principle of growth,form quality and spatial utilization ability under different planting densities and mixed species proportions of Fraxinus mandshurica plantations,this paper aims to provide theoretical basis for cultivating big diameter wood of Fraxinus mandshurica plantations.[Method]Taking pure Fraxinus mandshurica plantations with 10000,4400,2500 and 2200 tree/ha planting density,and mixed Fraxinus mandshurica plantations of 1 line Larix olgensis∶1 line Fraxinus mandshurica and 3 line Larix olgensis∶3 line Fraxinus mandshurica with 2500 tree/ha planting density,which was planted in 1998 from Maoershan Forest Farm of northeastern China as materials,growth index,form quality index and spatial utilization ability index were investigated and comprehensive evaluation value was calculated by improved hierarchical analysis method.[Result]The growth index,form quality index and spatial utilization ability index of pure Fraxinus mandshurica plantation with 4400 and 10000 tree/ha density reduced by 3.15%,2.58% and 8.62%,2.58%,respectively than that of pure Fraxinus mandshurica plantation with 2500 tree/ha density,and that of Fraxinus mandshurica plantation with 2200 tree/ha density increased by 21.89%,7.41% and 2.94%,respectively than that of pure Fraxinus mandshurica plantation with 2500 tree/ha density.The growth index,form quality index and spatial utilization ability index of mixed plantations with 1 line Larix olgensis∶1 line Fraxinus mandshurica and 3 line Larix olgensis∶3 line Fraxinus mandshurica increased by 12.18%,9.05%,17.92% and 22.98%,12.14%,25.77%,respectively than that of pure Fraxinus mandshurica plantation with 2500 tree/ha density.The rank of comprehensive evaluation value of Fraxinus mandshurica from big to small was mixed plantation of 3 line Larix olgensis∶3 line Fraxinus mandshurica,pure plantation with 2200 tree/ha density,mixed plantation of 1 line Larix olgensis∶1 line Fraxinus mandshurica,pure plantation with 2500 tree/ha density,pure plantati

关 键 词：水曲柳人工林 形质 造林密度 混交比例 

分 类 号：S753.518[农业科学—森林经理学]