辽宁水稻主产区杂草种类调查及其优势度

Weeds Species Investigation and the Dominance in Main Rice Producing Area of Liaoning Province

采用倒置"W"取样法对辽宁省4个水稻主产区的稻田杂草种类进行调查,并记录杂草数量、盖度、高度、密度,统计各杂草的优势度。结果表明:辽宁省水稻主产区杂草共有78种,分别隶属于28科。主要杂草16种,隶属9科,其中,稗(Echinochloa crusgalli)、水葱(Scirpus validus)、牛毛毡(Eleocharis yokoscensis)、扁秆藨草(Scirpus planiculmis)、水绵(Spirogyra sp.)、苦草(Vallisneria natans)共6种,是辽宁省4个水稻主产区的优势杂草;鸭舌草(Monochoria vaginalis)、眼子菜(Potamogeton distinctus)在丹东和沈阳优势度也较高,亦为当地的优势种杂草。

We investigated weeds species in four main rice area of Liaoning province by inverted ＂W＂ sampling, and computed dominance after recording all quantities, cover degree, height, density of weeds. The result indicated that 78 weeds species of 28 families were collected. 16 weeds species of 9 families are primary ones. Echinochloa crusgalli, Scirpus planiculmis, Eleocharis yokoscensis, Scirpus validus, Spirogyra sp.,Vallisneria natans are preponderant weeds. Monochoria vaginalis and Potamogeton distinctus are also preponderant weeds in Dandong and Shenyang.