不同治理模式对侵蚀退化马尾松林植被生长的影响

Impact of the Different Management Patterns on the Vegetation Growth of Eroded and Degraded Pinusmassoniana Forest

为了探究不同治理模式对侵蚀退化马尾松林植被生长的影响,对小穴播草、等高草灌带、“老头松”改造、草-灌-乔4种治理模式的植被生长和物种多样性进行了分析。结果表明:在植被生长方面,各模式的乔木胸径、高度、密度,植被覆盖度和郁闭度均有所增加,“老头松”改造模式除乔木胸径外其余指标均最高,其乔木密度远高于其他模式。在物种多样性方面,各模式的物种数均有所增加,其中草-灌-乔和等高草灌带模式的物种数增加明显,有利于群落进一步演替。治理区相较于未治理区生态环境有所改善,但与风水林相比差距较大。建议对小穴播草和“老头松”改造模式进行阔叶树种的补植,以促进群落的演替;对密度高的马尾松林进行间伐抚育。

In order to explore the impact of different management patterns on the vegetation growth of eroded and degraded Pinusmassoniana forest,it was analyzed the vegetation growth and species diversity with four treatment models,that is models of small hole sowing grass,contour grass-brush belt,"old-man pine"transformation,grass-brush-tree combination.The results show that in terms of vegetation growth,the DBH,height,density,vegetation coverage and canopy closure of each model increased.The"old-man pine"transformation model has the highest indexes except for the DBH diameter,and the density of trees is much higher than other models.In terms of species diversity,the number of species in each model is increased.Among them,species numbers increased under the models of the grass-brush-tree combination and contour grass-brush belt,which is favorable for the further succession of the community.Compared with the untreated area,the ecological environment of the management area was improved,but still far behind that of the Fengshui forest.It is suggested to replant the broad-leaved tree species under the model of small-hole seeding grass and"old-man pine"transformation to promote the succession of the community,and to carry out thinning and breeding of the high-density masson pine forest.