摘要
以常规尿素为对照,研究了控释尿素用量与施用方式对玉米氮素利用和产量的影响。结果表明,随着施氮量的增加,玉米叶面积指数、干物质积累量、籽粒产量及籽粒蛋白质含量和产量均显著增加。施氮水平相同时,玉米氮肥利用率、产量和品质均表现为:控释尿素底施〉控释尿素侧施〉常规尿素侧施。与控释尿素侧施相比,底施分别使籽粒产量、籽粒蛋白产量和氮肥利用率提高4.8%-7.7%、5.6%~8.2%和13.9%-28.3%,均达显著水平。综合分析表明,与常规尿素和控释尿素侧施相比,底施包膜控释尿素150kgN/hm^2能够显著提高玉米氮肥利用率,提高其产量和品质。
With normal urea as control, the experiment was carried out to study the effects of the application rate and method of controlled - release urea on the N utilization and yield of maize. The results showed that,with the increase of N rate, leaf area index, dry matter accumulation, grain yield, grain protein content and yield of maize increased significantly. At the same N level, the nitrogen use efficiency, yield and quality of maize showed bottom application of controlled - release urea 〉 side dressing of controlled - release urea 〉 side dressing of normal urea. Compared with side dressing, the bottom application of controlled - release urea significantly increased the grain yield by 4.8% -7.7%, grain protein yield by 5.6% -8.2%, the N use efficiency by 13.90% - 28.3%. In conclusion, bottom application of controlled- release urea 150 kgN/hm^2 could increase the N use efficiency significantly,the yield and quality of maize.
出处
《山东农业科学》
2009年第7期63-65,共3页
Shandong Agricultural Sciences
基金
国家科技支撑计划(2006BAD10B07)
2008年公益性行业(农业)科研专项(200803028)
山东省中青年科学家科研奖励基金(2007BS06017)
关键词
玉米
控释尿素
施用方式
氮素利用率
产量
Maize
Controlled - release urea
Applying method
Nitrogen use efficiency
Yield