氯虫苯甲酰胺拌种对玉米种子活力及幼苗生长的影响

Effects on Seed Activity and Seedling Growth of Maize by Seed Dressing with Chlorantraniliprole

为研究氯虫苯甲酰胺拌种对玉米种子萌发、幼苗生长及生理生化指标的影响,采用平皿法和盆栽法研究氯虫苯甲酰胺不同剂量(0.5、1、2、3、4 g/kg)拌种处理对玉米种子萌发、幼苗生长量(株高、根长、根冠比等)以及生理生化指标(保护酶、根系活力、叶绿素含量等)的影响。结果表明:氯虫苯甲酰胺在0.5～3 g/kg剂量下拌种处理能明显提高玉米种子发芽势、发芽率、发芽指数和活力指数;增加幼苗期生长量;诱导幼苗叶片中CAT、POD、SOD、PAL、PPO活性升高;提高根系活力、叶绿素含量、还原糖含量及可溶性蛋白含量。氯虫苯甲酰胺在4 mg/kg剂量时对玉米植株的生长有一定的抑制作用,但各项指标仍高于空白对照。结果表明:合适剂量的氯虫苯甲酰胺拌种可以显著促进玉米种子萌发和幼苗生长。

To study the effects of maize seed dressing with chlorantraniliprole on seed germination,seedling growth and physiological and biochemical indexes,plate experiments in incubator and indoor pot experiments were conducted to study the seed germination,seedling growth(plant height,root length,root shoot ratio,etc.),physiological and biochemical indexes(protective enzyme,root activity and chlorophyll content,etc.)of maize by seed dressing with different dosage(0.5,1,2,3,4 g/kg)of chlorantraniliprole.The results showed that chlorantraniliprole at 0.5-3 g/kg significantly increased the germination potential,germination rate,germination index,vigor index of maize and increment in seedling stage,induced the activity of CAT,POD,SOD,PAL and PPO in maize seedling leaves,and increased root activity,chlorophyll content,sugar content and soluble protein content.Chlorantraniliprole inhibited the growth of maize after treated with 4 mg/kg,but the indicators were still higher than that of the control.In conclusion,chlorantraniliprole at suitable dosage could significantly promote seed germination and seedling growth of maize.