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研究了对照样地和火干扰样地马尾松人工林的物种多样性,对照样地内所有植物的物种丰富度指数。结果表明,火干扰样地内物种和植物个体数目均高出对照样地,火干扰样地各层和所有植物的均匀度值(J)显著提高,树冠层、灌木层、草本层的J值分别由0.710、.83、0.55提高到0.810、.89、0.72。火干扰样地比相似林分光照增强,温度升高,可溶性养分增多,适合多种灌木和草本植物入侵,尤其是阳性植物,火干扰样地中的灌木层马尾松个体数量增加,说明低强度地表火可以增加马尾松林生物多样性,有利于马尾松林的更新。
The species diversity of Pinus massoniana plantations in the control plots and fire disturbance plots was studied, and the species richness index of all the plants in the plots was compared. The results showed that the number of species and plant individuals in fire disturbance plots were higher than that of the control plots, and the evenness values (J) of all layers and all plants in fire disturbance plots were significantly increased. The J values of canopy layer, shrub layer and herb layer were respectively Increased from 0.710, .83, 0.55 to 0.810, .89, 0.72. The fire disturbance plots had more photosynthesis, higher temperature, more soluble nutrients and more suitable for the invasion of many shrubs and herbaceous plants, especially the positive plants. The number of individuals in the shrub layer in the fire disturbance plots increased, indicating that the low intensity Surface fire can increase the biomass of Pinus massoniana forest and is conducive to the regeneration of Pinus massoniana forest.