徐州石灰岩丘陵区不同人工林林下植物多样性研究

Study on the species diversity of the different plantation types in the limestone hilly areas of Xuzhou city

在野外调查的基础上,采用物种丰富度指数Patrick指数(dP)、Simpson指数(SSP),Shannon-Wiener指数(SSW)和Pielou均匀度指数(JSW、JSP),对徐州石灰岩丘陵区主要林分林下植物进行物种多样性分析。结果表明:(1)同一林分中,灌木层木本植物丰富度均要高于乔木层;不同林分间植物丰富度有较大差异。(2)物种多样性测定结果显示,同一林分物种多样性指数灌木层大于乔木层;在不同林分间Simpson指数(SSP)和Shannon-Wiener指数(SSW)测定多样性的结果有一定差异。(3)林分间相似系数变化范围在0～0.7826之间,侧柏(Platycladus orientalis)林分和桑(Morus alba)+刺槐(Robinia pseudoacacia)林分、刺槐+侧柏林分和刺槐+白榆(Ulmus pum-ila)林分之间相似系数分别为0.1429、0.1333;侧柏+黄连木(Pistacia chinensis)+刺槐林分和侧柏+三角枫(Acer buergerianum)+五角枫(Acer mono)林分,以及刺槐+侧柏林分和刺槐+白榆林分间相似性系数分别达到了0.7619、0.7826,林分间相似性较高。

Based on the field investigation,the species diversity of shrub and herb layers under the main plantation types in Xuzhou city were studied by using the Patrick index,Simpson index,Shannon-Wiener index and Pielou index.The results showed that：（1） In the same plantation,the richness of shrub layer was higher than that of tree layer.The richness of different plantations were big different.（2） Species diversity investigation demonstrates that the species diversity indices of different layer in the same plantation showed an order：herb layer tree layer.And the indices in the same plantations were different by different methods of species diversity.（3） The Sorenson indices of the seven plantations were 0— 0.782 6.The index of Morus alba ＋ Robinia pseudoacacia and Platycladus orientalis is 0.142 9,the index of P.orientalis and R.pseudoacacia ＋ Ulmus pumila is 0.133 3,they have less common species,and the largest biodiversities between plantations.The index of P.orientalis ＋ Pistacia chinensis ＋ R.pseudoacacia and P.orientalis ＋ Acer buergerianum ＋ A.mono is 0.761 9,the index of R.pseudoacacia ＋ P.orientalis and R.pseudoacacia ＋ U.pumila is 0.782 6,they have the largest common species,and the less biodiversities between plantations.