丰尔安在夏播玉米上的应用效果

Effect of the Growth Regulator Fengeran on Summer Corn

研究了丰尔安在屯玉 2、屯玉 5 2、中单 940 9、登海 1号、冀丰 5 8等夏播玉米上应用效果。结果表明 :在 8叶 1心期叶面喷施 2 0 0mg/kg丰尔安溶液 30 0kg/hm2 ,可有效控制玉米营养生长 ,抑制节间伸长 ,降低株高 2 9 0～ 40 5cm ,降低穗位 1 9 5～ 2 5 0cm ,茎粗增加 0 2～ 0 5cm ,“棒三叶”面积增加 1 0 90 %～ 1 8 66% ,增产率 6 5 5 %～ 1 5 40 %。

The effect of Fengeran on some summer corn varieties was studied.The results showed that the application of 300kg/hm 2 of Fengeran solution with the concentration of 200mg/kg in the eight-leaf-period,the vegetative growth of corn plants was effectively controlled and the elongation of node length inhibited.Fengeran could reduce the plant height by 29.0～40.5cm,depress the ear position by 19.5～25.0cm,increase the stem diameter by 0.2～0.5cm and the functional leaves area by 10.90%～18.66%,and increase the yield by 6.55%～15.40%.