| 摘要: |
| 【目的】对延安城郊不同侧柏群落的近自然度进行评价，为其近自然经营的实施提供依据。【方法】在延安城郊侧柏-辽东栎混交林、侧柏-河北杨混交林、侧柏-刺槐混交林和侧柏纯林中布设样地进行林分组成与结构调查，采用敏感性分析方法，筛选出建群种平均胸径、建群种树高、天然更新幼苗株数、乔木层物种丰富度、乔木层Pielou均匀度指数、灌木草本层Margalef指数、土壤有机质含量、土壤全氮含量、土壤速效磷含量、土壤速效钾含量、自然构成系数和干扰度指数共12个反映群落类型特征的敏感性指标，运用层次分析法构建近自然度评价指标体系，计算各林分类型的近自然度综合指数，对4种林分类型的近自然度进行评价。【结果】侧柏-辽东栎混交林、侧柏-河北杨混交林、侧柏-刺槐混交林、侧柏纯林的近自然度综合指数分别为0.78，0.76，0.38和0.19，相应的自然度等级分别为2、2、4和5。【结论】侧柏-辽东栎混交林和侧柏 河北杨混交林处于半自然状态，侧柏-刺槐混交林处于近人工状态，侧柏纯林处于人工状态。 |
| 关键词: 侧柏 人工林 混交林 纯林 近自然度评价 |
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| 基金项目:国家林业局林业公益性行业科研专项（201104045） |
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| Naturalness assessment of Platycladus orientalis and mixed forests in Yan’an Suburb |
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GUO Ting-dong,WANG De-xiang,WANG Tao,et al
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| Abstract: |
| 【Objective】This study assessed naturalness of different Platycladus orientalis communities in Yan’an suburb.【Method】Platycladus orientalis and Quercus wutaishannice mixed plantation,Platycladus orientalis and Populus hopeiensis mixed plantation,Platycladus orientalis and Robinia pseudoacacia mixed plantation,and Platycladus orientalis in Yan’an suburb were selected.Stand structures were investigated and sensitive analysis was conducted to filtrate out 12 indexes,namely DBH of constructive tree species,height of constructive tree species,number of natural regeneration,species richness in arbor layer,Pielou index in arbor layer,Margalef index in shrub and herb layer,organic matter content,total nitrogen content,soil available P,soil available K,compose index and interference to describe the community characteristics.Then the analytic hierarchy process (AHP) was used to build an index system for assessing the naturalness and the integrated index of naturalness of every stand type was calculated and evaluated. 【Result】The integrated indexes for naturalness of Platycladus orientalis and Quercus wutaishannice mixed plantation,Platycladus orientalis and Populus hopeiensis mixed plantation,Platycladus orientalis and Robinia pseudoacacia mixed plantation,and Platycladus orientalis plantation were 0.78,0.76,0.38,and 0.19,and their naturalness classifications were 2,2,4,and 5,respectively.【Conclusion】Platycladus orientalis and Quercus wutaishannice mixed plantation,and Platycladus orientalis and Populus hopeiensis mixed plantation were semi-natural forests,Platycladus orientalis and Robinia pseudoacacia mixed plantation was near-plantation,and Platycladus orientalis plantation was plantation. |
| Key words: Platycladus orientalis artificial forest mixed forest pure forest the assessment of naturalness |
