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采用单因素随机区组设计,研究了3种药剂(A1:60%乙·嗪·滴丁酯、A2:60%乙·嗪·滴丁酯+48%灭草松、A3:48%灭草松)与清水对照组(A4)在玉米-大豆间作条件下,玉米、大豆苗期农艺性状、株防效及药害等级和成熟期作物产量,考察了玉米-大豆带状复合种植模式下除草剂除草效果及安全性。结果表明:3种除草剂对反枝苋、马唐防效好,对刺儿菜防效较差。药后15 d,A1与A2对杂草的防除效果最好,均在75%以上,其中A2对马唐的株防效达到了100%。药后30 d,各处理下的鲜重防效均在80%以上,A1对反枝苋的株防除效果最好为88.89%。玉米、大豆产量在A2处理下最高,分别较清水对照组高33.7%、39.4%。3种除草剂对玉米、大豆幼苗都有一定的药害症状,但药害等级均小于1,从株防效和对作物产量的影响分析,A2更适用于玉米-大豆带状复合种植模式。
A single-factor randomized block design was used to study the effects of three chemicals (A1: 60% azinisobutyl ester, A2: 60% ethyl tributyl phosphate, 48% bentazon, A3: 48% (A4) Under the maize-soybean intercropping condition, the agronomic traits of maize and soybean at the seedling stage, plant control efficacy and phytotoxicity grade and the crop yield at mature stage were studied. The effects of weeding in the corn-soybean compound cropping system Herbicidal effect and safety. The results showed that the three herbicides had good control effect on Amaranthus retroflexus and Crabgrass, but poor control effect on Spinach. On the 15th day after treatment, A1 and A2 had the best control effect on weeds, all above 75%, of which A2 had 100% control effect on Crabgrass. After 30 days of treatment, fresh weight control effect was above 80% under all treatments. The best control effect of A1 on Amaranthus retroflexus was 88.89%. The yield of maize and soybean was the highest under A2 treatment, which was 33.7% and 39.4% higher than the control group. The three herbicides had some phytotoxicity symptoms on maize and soybean seedlings, but the phytotoxicity level was less than 1. According to the control effect of plant and the effect on crop yield, A2 was more suitable for corn-soybean compound banding mode.