贵阳市花溪地区狼尾草地的杂草种类调查

Weed Species in Pennisetum alopecuroides Meadow in Huaxi District,Guiyang

为了解贵阳市花溪地区狼尾草地的杂草发生情况,为其杂草防除提供依据,采用倒"W"9点取样法对其进行调查。结果表明:狼尾草地的杂草共有13科33种。其中,菊科最多,有14种,占42.42%;禾本科、苋科、唇形花科分别有5种、3种和2种,各占15.15%、9.09%和6.06%;其余科各1种,各占3.03%。相对多度>5%的优势杂草有苣荬菜、辣子草、马唐、莶、鬼针草、艾草、宝盖草、莎草、狗尾巴草、剪刀股、藜、半夏、山苦荬、辣椒、一年蓬、酢浆草、荠菜、小蓟、马兰、野苋和何首乌。其中,苣荬菜、辣子草、马唐和莶为当地狼尾草地的优势种群。

Weed species in P .alopecuroides meadow were investigated by using the inverted W-pattern with 9 sampling method to understand weed occurrence status in P .alopecuroides meadow in Huaxi District,Guiyang.The results showed that there are 33 species of weeds belonged to 13 families,and 14 Asteraceae weeds, 5 Gramineae weeds, 3 Amaranthaceae weeds and 2 Labiatae weeds account for 42.42%,15.15%、9.09% and 6.06% respectively.Dominant weeds with relative abundance 〉5% are Sonchus brachyotus ,Galinsoga parviflora , Digitaria sanguinalis , Siegesbeckia orientalis , Bidens pilosa ,Artemisia argyi ,Lamium amplexicaule ,Cyperus rotundus ,Setaira viridis ,Ixeris debilis , Chenopodium album ,Pinellia ternate ,Ixeris chinensis ,Capsicum frutescens ,Reigeron annuus ,Oxalis corniculata ,Capsella bursa-pastoris ,Cirsium segetum ,Var .indica,Amaranthus viridis and Fallopia multiflora .S.brachyotus,G.parviflora,D.sanguinalis and S.orientalis,are dominant populations in local P .alopecuroides meadow.