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采用随机区组设计了7个施氮水平,以不施氮为对照,研究了包膜复合肥用量及施用方法对夏玉米氮肥利用以及产量的影响。结果表明:增加肥料的用量,夏玉米叶面积指数、干物质积累量、产量及蛋白质产量也显著增加;施氮量相同时,玉米的产量和氮肥利用率均表现为:底施包膜复合肥>侧施包膜复合肥>普通尿素;与包膜复合肥侧施相比,底施分别使产量、蛋白质产量和氮肥利用率提高9·6%~12·4%、12·0%~19·0%和16·1%~26·8%。综合分析表明,与普通尿素和复合肥侧施相比,底施包膜复合肥225kg/hm2,可显著提高玉米氮肥利用率和产量,是适宜该地区大面积推广的施肥模式。
Seven nitrogen levels were designed by randomized block design. The effects of application amount of coated compound fertilizer and application methods on N use efficiency and yield of summer maize were studied. The results showed that increasing the amount of fertilizer, leaf area index, dry matter accumulation, yield and protein yield of summer maize also increased significantly. When the amount of nitrogen was the same, the yield and nitrogen use efficiency of maize showed the following: > Application of coated compound fertilizer> common urea; compared with the application of coated compound fertilizer, the bottom facilities increased yield, protein yield and nitrogen use efficiency by 9.6% to 12.4% and 12.0% to 19% · 0% and 16 · 1% ~ 26 · 8%. Comprehensive analysis showed that, compared with common urea and compound fertilizer side application of 225kg / hm2 undercoated compound fertilizer can significantly increase the utilization rate of corn N fertilizer and yield, is suitable for large-scale popularization of fertilization mode in the region.