摘要
采用盆栽试验方法,模拟田间生态环境,研究了不同比例控释尿素与普通尿素配施对夏玉米整个生育期土壤NH4+-N和NO3--N变化的影响。结果表明:旱作夏玉米栽培条件下应用控释尿素,土壤中NH4+-N含量保持在较稳定水平,可有效降低NO3--N淋失损失,减少对环境的污染。基于成本等综合考虑,推荐普通尿素和控释尿素混施作基肥,比例为普通尿素55%、控释尿素45%。
The effects of combined application of controlled-release urea and common urea on the changes of NH4^＋-N and NO3^--N in Soil in the whole growth period of summer maize were studied by pot culture experiment.The results showed that the application of controlled-release urea in dry-land summer maize could make the content of NH4^＋-N maintain at constant level,decrease the leaching of NO3^--N and reduce the environmental pollution.55% common urea and 45% controlled-release urea were recommend as the base fertilizer based on cost considerations.
出处
《河北农业科学》
2009年第10期32-34,共3页
Journal of Hebei Agricultural Sciences
基金
安徽省科技攻关项目(0701030215)
关键词
夏玉米
控释尿素
盆栽
铵态氮
硝态氮
Summer maize
Controlled-release urea
Pot culture
NH4＋-N
NO3--N
