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通过对湖北鄂州长江外滩草本植物群落进行调查,研究滩地造林和林下间作对草本植物群落物种组成、群落类型、物种多样性、原生优势种的重要值及生物量变化的影响。在此次观察期内的研究结果表明:(1)滩地造林使草本植物物种增加16种,群落类型增加7种;(2)滩地造林使原优势种芦苇(Phragmitesaus tralis)和荻(Miscanthussacchariftorus)的重要值和生物量都有所下降;(3)滩地造林明显增加草本植物群落的Shannon Wiener指数H’和丰富度R,使Pielou均匀度指数J有一定程度的提高,但不影响Simpson指数D;(4)林下间作能提高草本植物群落的物种多样性。
Based on the survey of the herbaceous plant communities on the Yangtze River in Hubei Province, this paper studied the effects of plantation and intercropping on the species composition, community type, species diversity and the value of primary dominant species and biomass in the herbaceous plant communities. The results of the study during this observation period showed that: (1) The afforestation on the beach increased the species of herbaceous plants by 16 and the types of the communities increased by 7 species. (2) The afforestation on the beach made the dominant species Phragmites aus tralis and Miscanthussacchariftorus (3) Shannon Wiener index H ’and richness R of the herbaceous plant community increased obviously on the beach land so that the Pielou evenness index J increased to a certain extent without affecting the Simpson index D; (4) Intercropping can improve species diversity of herbaceous communities.