玉米田除草剂金龙裕的田间药效试验

Field Efficacy of a Corn Herbicide,Jinlongyu

以常用玉米品种郑单958为试验材料,烟嘧磺隆、莠去津、二甲四氯三元复配的新型玉米田除草剂金龙裕为试验药剂,研究不同用量（低剂量750 g/hm^2,中剂量1 049 g/hm^2,高剂量1 349g/hm^2,倍量剂量2 099 g/hm^2）金龙裕对玉米田杂草的防治效果。结果表明：金龙裕对双子叶杂草有较高的杀草速效性,药后7 d株防效即达到79.71%~85.63%;而对单子叶杂草持效期长,药后28 d株防效为79.67%~94.92%。药剂对杂草的株防效和鲜质量防效随药剂用量的增加而增加。对杂草总体来说,施药后28 d,倍量剂量处理的株防效达94.53%,显著高于低剂量处理的防效（78.63%）;所有处理的鲜质量防效均在95.32%以上。同一处理对不同杂草的防治效果不同,双子叶杂草最为敏感,其后依次为麦苗、狗尾草、稗草,马唐最不敏感。喷药后,玉米有轻微扭曲,但不影响其后期产量,所有处理的产量（低剂量8 247 kg/hm^2,中剂量9 243 kg/hm^2,高剂量9 836kg/hm^2,倍量剂量9 465 kg/hm^2）均显著高于清水对照（6 761 kg/hm^2）。说明施用金龙裕对玉米安全并有增产作用,在生产中推荐中剂量和高剂量防治玉米田杂草。

In this experiment,Zhengdan958,a common maize variety was used as material to test the control effect of different dosages（low dose,750 g / ha; middle dose,1 049 g / ha; high dose,1 349 g / ha;fold amount dose,2 099 g / ha） of Jinlongyu,a new type herbicide containing nicosulfuron,atrazine and MCPA,on cornfield weeds.The results showed that Jinlongyu could quickly control dicotyledonous weeds,and the quantity control efficiency reached 79.71% —85.63% 7 d later,while to monocot weeds,it had a long control duration,with the quantity control efficiency of 79.67% —94.92% 28 d later.The control efficacy for weeds quantity and fresh weight increased with the use of pharmaceutical dosage increasing.To the total weeds,28 d after spraying,the fold amount treatment had a quantity control efficiency of94.53%,significantly higher than that of the low-dose treatment（78.63%）; the fresh weight control efficiency of all the treatments were more than 95.32%.The same treatment for different weeds showed different control effect,the most sensitive species were dicot weeds,followed by barley grass,green foxtail,barnyard grass,and crabgrass was the most insensitive.After spraying the herbicide,corn showed a slight twist,but its production was not affected,which of all the treatments（8 247,9 243,9 836,9 465 kg / ha for the low dose,middle dose,high dose and fold amount dose treatments,respectively） were significantly higher than CK（6 761 kg / ha）,indicating that Jinlongyu was safe for maize and had a yield increasing effect.The middle dose and high dose are recommended in prevention of cornfield weeds in production.