松嫩平原盐碱化草甸中5种豆科植物的分布格局研究

DISTRIBUTION PATTERN OF FIVE LEGUMINOUS PLANTS IN ALKALIZED MEADOW IN THE SONGNEN PLAIN

采用区组样方方差分析方法,分析了松嫩平原盐碱化草甸中5种主要豆科植物的种群和群落分布格局,并研究了其生长参数与土壤环境的关系,结果表明:1)五脉山黎豆、山野豌豆、兴安胡枝子、细叶胡枝子的种群格局为聚集分布,扁蓿豆种群聚集程度较低,并有随机分布的趋势;2)5种豆科植物的群落格局均为聚集分布,聚集强度的大小顺序依次为:兴安胡枝子—五脉山黎豆—细叶胡枝子—山野豌豆—扁蓿豆;3)五脉山黎豆、山野豌豆、兴安胡枝子在群落内的平均聚集规模为72 m2,细叶胡枝子为144 m2,扁蓿豆为36 m2;4)盐碱化草甸中豆科植物的生长参数及群落物种组成受土壤理化性质影响明显.

Population distribution patterns for five common leguminous plants were analyzed with block quadrat variance. Relation between growth parameters and soil environment was also investigated. Data showed that： 1） Lathyrus quinquenervius , Vicia amoena , Lespedeza daurica , Lespedeza hedysaroides showed clump distribution while Medicago ruthenica showed random distribution; 2） all five leguminous plants showed clump distribution, with the strongest pattern intensity being Lespedeza daurica, followed by Lathyrus quinquenervius , Lespedeza hedysaroides , Vicia amoena and Medicago ruthenica ; 3） the average aggregation scale for Lathyrus quinquenervius, Vicia arnoena, Lespedeza daurica in the community was 72 m^2 , those for Lespedeza hedysaroide and Medicago ruthenica being 144 and 36 m^2 respectively; 4） the growth parameters of five leguminous plants and species composition in the community were apparently affected by soil physicochemical characteristics.