氮肥追施方式对张掖市制种玉米的影响初报

Gansu Agricultural Science and Technology(2014)

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Abstract
在全膜等行距种植条件下,对制种玉米氮肥不同追施方式进行了试验。结果表明,以基施N 168 kg/hm2、P2O5168 kg/hm2、K2O 75 kg/hm2、ZnSO45 kg/hm2,抽雄期追施N 252 kg/hm2的处理最好,折合产量为9096.7 kg/hm2,较对照(基施N 420 kg/hm2、P2O5168 kg/hm2、K2O 75 kg/hm2、ZnSO45 kg/hm2,不追施氮肥)增产15.73%,产投比最高,为10.27;基施N 168 kg/hm2、P2O5168 kg/hm2、K2O 75 kg/hm2、ZnSO45 kg/hm2,拔节期追施N 168 kg/hm2、抽雄期追施N 84 kg/hm2的处理次之,平均折合产量为9473.3 kg/hm2,较对照增产20.52%,产投比较高,为9.92。
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