以桂糖29号、桂糖02-1156、桂糖05-3084、新台糖22号4个甘蔗品种为材料,用56%二甲四氯钠盐、48%蔗草灭、38%莠去津、99.9%乙草胺4种除草剂做防除杂草的田间试验。结果表明:甘蔗产量最高的为38%莠去津胶悬剂处理,但各处理间差异不显著;产量构成因素中,茎径差异显著,株高、有效茎数、分蘖率差异不显著。这4种除草剂对甘蔗安全性好,可做土壤封闭和芽后(3～5叶)处理。其中56%二甲四氯钠粉剂对单子叶杂草防效差,99.9%乙草胺乳油对3叶以上的杂草防效差,38%莠去津胶悬剂防效最佳,田间剂量以3 748 g/hm2为宜。 Four sugarcane varieties of Guitang 29, Guitang 02-1156, Guitang 05-3084, Xintaandu 22 were used as materials, and 56% of dimethylsulfotoluene, 48% of canense and 38% of atrazine , 99.9% acetochlor 4 herbicides do field trials against weeds. The results showed that the highest yield of sugarcane was treated with 38% Atrazine. However, there was no significant difference among the treatments. Among the components of yield, there was significant difference in stem diameter and no significant difference in plant height, number of effective stalks and tillering rate. These four kinds of herbicides have good safety to sugar cane and can be used for soil sealing and post-bud treatment (3 to 5 leaves). Among them, 56% dimethylchlorotoluene powder had poor control effect on monocotyledonous weeds, 99.9% acetochlor EC had weaker control effect on weeds with more than 3 leaves, 38% atrazine suspension had the best control effect, field dose 3 748 g / hm2 is appropriate.