| 摘要: |
| 通过样方调查，对深圳市龙岗区生态风景林中的未改造低效林、天然次生林及3种改造林分（林下套种林、皆伐林、疏伐林）的植物多样性进行对比分析，了解不同改造措施对林分植物多样性的影响。结果表明：各类型林分的物种丰富度排序为林下套种林>皆伐林=天然林>疏伐林>未改造林；经过3种方式改造后林分乔木层的Shannon Wiener指数、Simpson指数、Pielou指数皆高于未改造低效林和天然次生林，其中Shannon Wiener指数和Pielou指数均以林下套种林最高，其次是皆伐林，Simpson指数以皆伐林最高，林下套种林次之；改造后林分灌草层的物种多样性指数均高于未改造林，其中皆伐林物种多样性指数均高于天然次生林。综合比较疏伐、皆伐和林下套种3种改造方式对生态风景林群落植物多样性的影响，疏伐是较适宜本地区生态风景林改造的措施。 |
| 关键词: 深圳 龙岗区 生态风景林 林分改造 物种多样性 |
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| The Effect of Tree Transformation Ways on Species Diversity of Eco-landscape Forest in Longgang, Shenzhen |
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wu zhimin,chen xuemei and feng zhijian
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South China Agricultural University
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| Abstract: |
| Three improved Eco landscape forest communities, non-transform inefficient forest and well preserved natural secondary forest in Longgang District of Shenzhen city were studied by plot survey method, as to understand the effect of different transformation ways on plant species diversity. The results showed that: the species richness order of different types of communities was: forest of intercropping transformation (ITF)>forest of clear cutting transformation (CCTF)=natural secondary forest (NSF)>forest of thinning transformation (TTF)>unimproved forest (UF); For tree layer, Simpson index, Shannon-Wiener index and Pielou index of transformed forests were higher than UF and NSF. Shannon-Wiener index and Pielou index of ITF were the highest, followed by CCTF. Simpson index of CCTF was the highest, followed by ITF; For shrub herb layer, diversity indexes of transformed forests were higher than UF, especially, diversity indexes of CCTF were higher than NSF. Compared with clear cutting and inter-planting, thinning was the best way to transform Eco landscape forest in this area. |
| Key words: Shenzhen Longgang District Eco-landscape forest transformation species diversity |
