摘要
采用样地调查法分析了贵州茂兰自然保护区喀斯特森林林隙大小对林隙植物和更新的影响。结果表明：林隙大小对林隙中树木密度、优势度、幼苗向幼树的转化率和幼苗、幼树的空间格局等均有不同程度的影响。林隙中幼苗、幼树个体密度及种密度随林隙面积增大而迅速减小，成树的个体密度和种密度变化不大。大林隙中幼苗向幼树的转化率明显高于小林隙。小林隙的更新苗多由小龄级的幼苗组成，而大林隙中幼树所占比例较大。不同树种在不同大小级林隙内相对优势度位序不同，大体表现为阳性树种在大林隙中具有较大的优势度，而耐阴树种在较小的林隙中优势度较大。在大林隙（〉200m^2）和中等林隙（100～200m^2）中，各树种的幼苗、幼树均呈集群分布，而在小林隙（〈100m^2）中则为随机分布。
In order to obtain a further understanding of the relationship of gap regimes and regeneration of the Karst forest in Maolan Natural Reserve in Guizhou province, transition rate of seedlings, density and important value of tree species and spatial distribution pattern of saplings and seedlings were analyzed. The results showed that density of saplings and seedlings decreased with gap size increasing, but density of trees did not change significanty. Transition rate from seedlings to saplings was higher in large gaps than in small ones. In small gaps, they were occupied mainly by seedlings, but in large gaps, they were occupied mainly by saplings. Important value order of tree species was different in different size gaps. It was seen that important value of light demanding trees were high in large size gaps and important value of shade tolerant trees were high in small ones. In large size gaps （ 〉 200 m^2 ） and medium size gaps （ 100--200 m^2 ）, saplings and seedlings were clump distribution, but they were random distribution in small gaps （ 〈 100 m^2）.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第2期34-38,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
贵州省自然科学基金资助项目(黔科合J字(2007)2049号)
贵州省教育厅自然科学基金资助项目(黔教科2001028)
贵州师范大学博士基金资助项目
