中度火干扰对具茨山典型植被草本植物早期恢复特征的影响
Characteristics of herbaceous plant vegetation recovery of typical vegetation at its early recovery stage in moderate burned areas in Juci Mountain National Forest Park

为了解火干扰后火烧迹地植被恢复规律，对新郑具茨山国家级森林公园侧柏林、草丛2种不同植被类型火烧迹地和未火烧地开展植物群落学调查，研究了中度火干扰对该区不同植被类型植被恢复早期草本植物恢复特征的影响。结果表明：所研究的2种火烧迹地类型草本植物物种重要值和物种多样性指数值均表现出相同的变化趋势，即火干扰后草本植物物种重要值比未火干扰草本植物重要值显著减小（P<0.05），物种种类数量显著增加（P<0.05）；火干扰后草本植物物种多样性Simpson指数(D)、Shannon指数(H)均显著高于未火干扰相应的物种多样性指数(P＜0.05)；火干扰前后侧柏林和草丛中大多数草本植物为广生态位种群，狭生态位型物种相对较少；侧柏林和草丛地火干扰后生态位重叠度较低的种对数增加。
In order to find the changing rules of vegetation restoration after fire disturbance,the effects of early herbal recovery characteristics of different vegetation types in Juci Mountain National Forest Park after moderate fire disturbance were studied through community surveying the burned area and unburned area of Platycladus orientalis forest and herbage.Results showed that the important values and species diversity indexes of the two types of burned area studied had the same changing trends.Species importance values of the two burned types declined significantly comparing with that of unburned area (P<0.05).The number of herbaceous plant species of two burned types increased significantly comparing with that of unburned area (P<0.05).The values of species diversity Simpson index (D),Shannon index (H) of the two burned types were significantly higher than that of unburned area (P<0.05).Studying the niche of the two vegetation types before and after fire disturbance showed that the majority of Platycladus orientalis forest and herbage were the wide niche populations,and the narrow niche-type species was relatively smaller than that of wide niche-type species.The numbers of species-pairs with lower values of niche overlap increased.