Effects of Different Afforestation Modes on Characteristics of Plant Composition and Diversity at South Guangxi
In order to find out the characteristics and changes of undergrowth plant diversity in different afforestation modes, and to provide theoretical basis for the exploration of scientific and reasonable planting patterns of plantation. [ Method] Taking three common affor-estation modes ( pure plantation, mixed plantation and man-natural mixed plantation) as the research object, typical sampling method was a-dopted to analyze the understory shrub layer and herb layer from plant species, species diversity index and similarity relationship. [ Result] The results showed that the number of species in shrub layer and herb layer in pure plantation, mixed plantation and man-natural mixed plantation were 33, 36, 29 and 32, 29, 9, respectively. The dominant species in the shrub layer of the three afforestation modes were Melastoma dode-candrum and Mussaenda pubescens, the dominant species in the herb layer of the mixed plantation and the man-natural mixed plantation was Dicranopteris linearis, and the dominant species in the pure plantation was Oplismenus undulatifolius. In addition to evenness index, Shannon-Wiener index, Simpson index and richness index had significant differences between man-natural mixed plantation and pure plantation ( P<0.05) ,while species diversity in herb layer had no significant differences between afforestation modes( P>0.05) . The similarity coefficients of shrub layer or herb layer were generally low in the three afforestation modes. [ Conclusion] The high species diversity of mixed plantation and man-natural mixed plantation is the direction of forest management and cultivation in the future.
Afforestation modeMixed plantationShrub layer and herb layerPlant diversity
万方数据
维普
