赣江源低效针叶林物种多样性分析
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摘要
本文通过设置标准样地对赣江源低效针叶林物种多样性进行分析,结果表明:湿地松林分属于湿地松和杉木复层林分,马尾松林分以纯林为主,杉木在马尾松林中占比重7.39%～23.94%。湿地松林分中有51个植物种,马尾松群落中有28个植物种。湿地松林分中乔木层(0.5187)、灌木层(0.8324)、草本层(0.6061)各层Simpson多样性指数大于马尾松林分乔木层(0.2904)、灌木层(0.7969)和草本层(0.5711)。研究区域内的林分结构很不理想,难以发挥森林的三大效益——经济效益、生态效益和社会效益,特别是生态效益很难得到保障,因此研究区域内的低质低效林迫切需要进行合理的改造。
In this study,by setting standard plots to analysis species diversity in low effect coniferous forest of Ganjiangyuan in Jiangxi Province,the results showed that,Pinus elliottii stands belong to P.elliottii and Cunninghamia lanceolata duplicate-stratum stands,P.massoniana stands were mainly pure forests,the proportion of C.lanceolata species in P.massoniana forests was 7.39 ～23.94 percent.In the P.elliottii stands,including 51 plant species,and there were 28 plant species in P.massoniana community.The Simpson diversity index of the tree layer(0.5187),shrub layer(0.8324),herb layer(0.6061) of P.elliottii stands was higher than that of P.massoniana stands,which was respectively the tree layer(0.2904),shrub layer(0.7969) and herbaceous layer(0.5711).The stand structure in the study area is not ideal,it is difficult to bring into play the three major benefits of the forest-economic benefits,ecological benefits and social benefits,especially the ecological benefit is very difficult to be guaranteed.Therefore,the low-quality and low-efficiency forests in the study area urgently need to be reformed reasonably.
In this study,by setting standard plots to analysis species diversity in low effect coniferous forest of Ganjiangyuan in Jiangxi Province,the results showed that,Pinus elliottii stands belong to P.elliottii and Cunninghamia lanceolata duplicate-stratum stands,P.massoniana stands were mainly pure forests,the proportion of C.lanceolata species in P.massoniana forests was 7.39 ～23.94 percent.In the P.elliottii stands,including 51 plant species,and there were 28 plant species in P.massoniana community.The Simpson diversity index of the tree layer(0.5187),shrub layer(0.8324),herb layer(0.6061) of P.elliottii stands was higher than that of P.massoniana stands,which was respectively the tree layer(0.2904),shrub layer(0.7969) and herbaceous layer(0.5711).The stand structure in the study area is not ideal,it is difficult to bring into play the three major benefits of the forest-economic benefits,ecological benefits and social benefits,especially the ecological benefit is very difficult to be guaranteed.Therefore,the low-quality and low-efficiency forests in the study area urgently need to be reformed reasonably.
引文
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[4]张千惠,吴霞,王媚臻,等.林分密度对马尾松林林下物种多样性和土壤理化性质的影响[J].应用生态学报,2018,29(3):732-738.
[5]朱军,湛斌,陈霞,等.紫金山针阔混交林空间结构特征与植物多样性分析[J].中南林业科技大学学报,2018,38(1):75-93.