唐家河自然保护区不同植被带草本层生物量及其影响因素

What Contributes to the Biomass Variaton of Herbaceous Layer in Different Vegetation Zones in Tang Jiahe National Nature Reserve?

为揭示唐家河自然保护区不同植被带草本植物生物量的差异及其影响因素,连续三年采用样方法对唐家河4个植被带(常绿阔叶林、常绿落叶阔叶混交林、落叶阔叶林、针叶林)的草本植物种类、多度、盖度及其所在群落的乔木层郁闭度和灌木层盖度进行调查.结果显示:1)不同植被带的草本生物量存在显著差异(P <0. 001),落叶阔叶林的草本生物量最高,常绿落叶阔叶混交林的草本地上生物量最低; 2)不同植被带的草本生物多样性指数、草本盖度、乔木层郁闭度、以及灌木层盖度均存在显著差异(P <0. 001); 3)通过混合线性模型分析出草本生物量主要受草本盖度(P <0. 001)、灌木层盖度(P=0. 018)以及乔木层郁闭度(P=0. 045)的影响.该结果为唐家河自然保护区草本植物的保护和修复提供理论基础.

To reveal the difference of herbaceous biomass and its influencing factors in different vegetation zones of Tang Jiahe National Nature Reserve,the herbaceous plant species,abundance,coverage and canopy density and shrub cover of four vegetation zones(Evergreen broad-leaved forest,Evergreen deciduous broad-leaved mixed forest,Deciduous broad-leaved forest and Coniferous forest)in Tang Jiahe National Nature Reserve were monitored for three years.The results showed that:1)There were significant differences in herbaceous biomass among different vegetation zones(P<0.001).The herbaceous biomass of deciduous broad-leaved forest was the highest,and that of evergreen deciduous broad-leaved mixed forest was the lowest;2)there were significant differences in herbaceous biodiversity index,herbaceous coverage,tree canopy and shrub coverage of different vegetation zones(P<0.001).3)The herbaceous biomass was mainly affected by herbaceous coverage(P<0.001),shrub coverage(P=0.018)and tree canopy density(P=0.045).The results provide a theoretical basis for the protection and restoration of herbaceous plants in Tang Jiahe National Nature Reserve.