黄河三角洲国家级自然保护区植物区系研究

对黄河三角洲国家级自然保护区的植物区系进行了研究分析，该区系具有以下特点：组成植物区系成分的种类比较少，计有43科，123属，193种，温带性质明显，温带分布型属占总属数的54．7％，植物成分以草本植物为主，自然分布的木本植物只有草麻黄（Ephedra sinica),柳（Salix matsudana)，杞柳（S.integra)，柽柳（Tamarix chinensis)，单叶蔓荆（Vitex trifolia var.simplicifolia)等少数几种，植物成分中盐生物种类比较丰富，计有73种，占总种数的37．8％，植物成分中湿生，水生植物种类丰富，计有92种，占总种数的47．7％，属于比较典型的湿地生态系统。

Studies of flora of Yellow River Delta National Reserve Area

The flora of Yellow River Delta National Reserve Area was studied here and the result showed its characters as follows:less species in this area,only 193 species belonging to 123 genera of 43 families,obviously temperate nature in floristic components with the genera of temperate areal types accounting for 54.7% of total genera,mainly herbaceous species and only few woody plants,that is Ephedra sinica,Salix matsudana,S.integra,Tamarix chinensis,Vitex trifolia var. simplicifolia ,relative rich species of halophytes,with 73 species accounting for 37.8% of total species,rich species of hydrophytes,with 92 species accounting for 47.7% of total,thus the delta area belonging to a typical wetland ecosystem.