秀山县稻田杂草种类及危害情况调查
South China Agriculture(2019)
Abstract
2019年,秀山县开展了稻田杂草种类及危害程度调查.结果表明,秀山县稻田杂草种类有25科57种,其中莎草科杂草15种,禾本科杂草6种,眼子菜科4种,鸭跖草科3种,千屈菜科3种,其他种类均为1~2种.密度较大的杂草有青萍、水绵、满江红、牛毛毡、黑藻、金鱼藻、轮藻等;频度较大的杂草有青萍、空心莲子草、稗草、双穗雀稗、鸭舌草、野慈菇、野荸荠、水绵、眼子菜、千金子等;多度较大的杂草有青萍、水绵、轮藻、满江红、牛毛毡、金鱼藻、黑藻等.按照"三层三级目测调查法"调查杂草的危害等级,发现秀山县稻田杂草优势种为稗草、青萍、满江红、金鱼藻、矮慈菇、牛毛毡、水绵等.
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