辽宁省果园杂草发生情况调查

采用倒置W九点取样法调查辽宁省果园杂草,结果明确辽宁省果园杂草有24科72种,其中阔叶杂草占73.61%,禾本科占15.28%,其他杂草占11.11%;一年生杂草占80.56%,多年生杂草占19.44%。相对多度达10%以上的杂草依次为鹅观草、藜、鸭跖草、三叶鬼针草、小飞蓬、刺儿菜、铁苋菜。其中鹅观草和藜相对多度在15%以上。

Occurrence of weeds in orchards in Liaoning Province

An investigation of weeds in orchards was carried out in Liaoning by inverted W-9 point sampling.The results showed that there were 72 weed species belonging to 24 families.Of all species recorded,broad-leaved weeds accounted for 73.61%,the grass family for 15.28% and the other for 11.11%.Annual weeds accounted for 80.56% of the total,and perennial weeds accounted for 19.44%.The weeds whose relative abundance(RA) was higher than 10% were Reogueria kamoji Ohwi,Chenopodium album L.,Commelina communis L.,Bidens pilosa L.,Conyza canadensis(L.) Cronq.,Cephalanoplos segetum(Bunge) Kitam.and Acalypha australis L..The first two species were the most abundant weeds whose RA was larger than 15%.