不同氮肥类型对玉米产量和经济效益及氮肥利用率的影响

Effects of Nitrogen Fertilizer Types on Yield,Economic Benefit and Nitrogen Use Efficiency of Maize

在大田试验条件下,采用随机区组设计了5个施氮水平,研究了不同类型尿素及用量对玉米干物质量、叶面积指数、籽粒产量、经济效益及氮肥利用率的影响。结果表明:包膜复合肥处理的开花前玉米的地上部干重、叶面积指数与常规尿素处理差异较小,开花后显著高于常规尿素处理,收获时其籽粒产量显著高于常规尿素处理。施包膜复合肥能显著提高玉米的籽粒产量、经济效益及氮肥利用率。

The randomized design with 5 nitrogen levels was carried out to study the effects of different types of nitrogen fertilizer on dry matter quantity,leaf area index,grain yield,economic benefit and nitrogen use efficiency（NUE） of the summer maize in field.The results showed that the dry matter weight above ground and leaf area index of the coated compound fertilizer（CCF） treatments were little different with those of the normal urea（NU） treatment before anthesis,while significant higher after anthesis;and the grain yield of maize treated with CCF increased significantly at harvest time.The application of CCF could significantly increase the grain yield,economic benefit and nitrogen use efficiency.