膦酸胆碱合剂对东北地区春玉米茎秆形态与质量性状的影响

Effect of ECK Treatment on the Stalk Characters of Spring Maize in the Northeast China

选用新型调节剂膦酸胆碱合剂,针对灌浆初期春玉米的形态及质量指标以及田间致倒伏推力,分析膦酸胆碱合剂处理后春玉米茎秆性状的变化,探讨膦酸胆碱合剂对春玉米茎秆形态的影响。结果表明,膦酸胆碱合剂处理可有效增加密植群体下春玉米的穗长,降低秃尖长,增加穗粒数,显著增加高密度条件下春玉米千粒重,改善春玉米穗部性状。同时通过降低玉米株高和穗位高,极显著增加单位长度干物重,增大截面积,改善玉米茎秆性状,显著增加春玉米田间致倒伏推力,从而降低倒伏发生的几率,实现密植群体丰产性和抗倒伏性的协同表达。

The effects of ECK on spring maize yield and stalk characters in the field were studied. The results showed that the length of the tip-barrenness was decrease by the treatment of ECK in the high density, the length of the ear and the kernels of spike were increased, the 1 000-kernels weight and the yield were remarkably increased. ECK also can lower the plant hight and the ear hight of the spring maize in the high density, augment the dry weight pre length and the transverse section area of the stalk, and enhance the thrust of the stalk. The above results indicated that ECK promoted the yield combination and the characters of the stalk effective.