对安徽省旱直播稻田的杂草种类群落及发生动态进行了田间调查。调查结果表明 :安徽省旱直播稻田杂草共有 13科近40种。其中禾本科杂草早于并重于阔叶类杂草危害 ,且旱直播田杂草在水稻圆秆前危害严重。在所试的 4种二元复配除草剂中以丁草胺 +农思它的田间防效为最佳 ,对禾本科杂草和阔叶类杂草防效均在 80 %以上 ,安全性好且成本较低 A field investigation was conducted on the weed species community and its occurrence in the dry and direct seeding rice fields in Anhui Province. The survey results show that there are nearly 40 species of weeds in direct seeding rice in Anhui Province. Among them, grass weeds were earlier than those of broad-leaved weeds, and weeds in direct-seeded fields were severely harmed before rice stems. Among the four tested binary compound herbicides, butachlor + Nongsi was the best in the field, with over 80% control effect on both grass weeds and broad-leaved weeds. Safety Good and low cost