差异化尿素对玉米生长及氮素利用率的影响

Effects of Different Urea on Maize Growth and Nitrogen Use Efficiency

为了探究差异化尿素对玉米生长及氮素利用率的影响,选用普通小颗粒尿素、普通大颗粒尿素、多肽大颗粒尿素、聚谷氨酸尿素等4种化肥进行肥效对比试验。结果表明:多肽大颗粒尿素、聚谷氨酸尿素在玉米穗行数、行粒数方面表现出增产作用,均能促进玉米根系生长;聚谷氨酸尿素可促进玉米籽粒的氮素吸收;常规用量且分底肥与返青追肥的施肥模式是适用于聚谷氨酸尿素的施用模式。

In order to explore the effects of different urea on maize growth and nitrogen use efficiency,four kinds of chemical fertilizers(common small particle urea,common large particle urea,polypeptide large particle urea and polyglutamic acid urea)were selected for fertilizer effect comparison test.The results showed that polypeptide large particle urea and polyglutamic acid urea could increase the number of rows and grains per ear,and could promote the growth of maize roots;polyglutamic acid urea could promote the nitrogen absorption of maize grains;the application mode of conventional dosage and divided into base fertilizer and green returning fertilizer was suitable for polyglutamic acid urea.