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通过控释尿素不同用量和不同掺混比例试验结果表明,在等氮量条件下,控释尿素比普通尿素提高氮肥表观利用率13.3%~21.5%,增产8.0%~18.2%。减量30%的控释尿素与两次性施用全量的普通尿素产量接近。控释尿素与普通尿素掺混使用效果更好,可以提高氮肥利用率。施用70%的控释尿素掺混30%的普通尿素比单纯施用等氮量的普通尿素玉米增产18.2%,氮肥表观利用率提高20.7%;比单纯施用等氮量的控释尿素玉米增产9.5%,氮肥表观利用率提高7.4%。施用控释尿素玉米主要通过增加穗粒数和百粒重提高产量,同时提高了籽粒粗脂肪含量。
Through the controlled release of urea with different dosage and different blending ratio test results show that under the condition of isobaric nitrogen, controlled release urea improve the apparent nitrogen utilization rate of 13.3% ~ 21.5% and increase 8.0% ~ 18.2% than ordinary urea. 30% reduction in controlled release urea and twice the amount of application of the normal amount of urea production close. Controlled-release urea and urea mixed use better, can improve nitrogen utilization. Application of 70% controlled release urea mixed with 30% of ordinary urea increased nitrogen yield by 18.2% and apparent nitrogen use efficiency increased by 20.7% %, Apparent nitrogen utilization rate increased by 7.4%. Controlled-release urea corn increased grain yield and grain fat by increasing grains per spike and 100-grain weight.