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采用田间小区试验方法,设置不同的控释尿素和普通尿素施用量及施用方法,研究控释尿素在黑龙江玉米生产上的施用效果及高效施用技术。结果表明,施用控释尿素玉米的产量均高于普通尿素。与不施氮处理相比,40%普通尿素与60%控释尿素混合一次性基施处理增产68.1%。在100%、75%、50%氮肥用量下,基施控释尿素较基施普通尿素氮肥表观利用率分别增加5.6%、6.2%、9.3%;氮肥农学效率分别提高2.2、4.1和5.1 kg/kg;肥料贡献率提高3.2%、5.1%和5.2%。控释尿素具有较高的生态环境效应,普通尿素与控释尿素混合基施能够在不影响玉米产量的同时省去追肥环节。
Using field plot test method, different controlled release urea and ordinary urea application rate and application method were set up to study the application effect and efficient application technology of controlled release urea in Heilongjiang corn production. The results showed that the application of controlled release urea corn production were higher than ordinary urea. Compared with the non-nitrogen treatment, 40% of ordinary urea and 60% controlled release urea compound base treatment yield 68.1%. Under 100%, 75% and 50% nitrogen application rates, the apparent utilization rate of KBS controlled urea application increased by 5.6%, 6.2% and 9.3% respectively compared with that of basal nitrogen application. The agronomic efficiency of N application increased by 2.2, 4.1 and 5.1 kg / kg; the contribution rate of fertilizer increased by 3.2%, 5.1% and 5.2%. Controlled-release urea has a high ecological effect. The combination of common urea and controlled-release urea can save the top-dressing without affecting the yield of corn.