摘要
通过连续2年的田间小区试验,研究了100%、75%和50%控释尿素(CRU)单独施用,100%、75%和50%普通尿素单独施用,以及普通尿素和控释尿素共同施用对玉米产量、农艺性状和氮肥利用率的影响。结果表明:在施氮量相等的条件下,施用控释尿素的玉米产量比普通尿素的产量提高4.7%~16.3%,氮肥利用率提高5.3%~17.4%,氮肥农学利用率提高1.2%~7.2%;在当地试验条件下,CRU75%处理与CRU50%处理是较佳的处理。
The field experiments were conducted to investigate the effect of controlled-release urea(CRU)and regular urea on agronomic traits and yield of maize and nitrogen use efficiency as well in Qujing,Yunnan in two years.Results indicated that CRU increased maize yield by 4.7%-15.6%,nitrogen use efficiency by 5.3%-17.4%and agronomic efficiency of nitrogen by 1.2%-7.2%compared to the regular urea.It is suggested that CRU 75%and CRU 50%can be considered as the optimal CRU rates for maize in the region under the cultivation with plastic mulching.
作者
尹梅
王贵宝
洪丽芳
付利波
陈华
陈检锋
任石所
苏帆
Yin Mei;Wang Guibao;Hong Lifang;Fu Libo;Chen Hua;Chen Jianfeng;Ren Shisuo;Su Fan(Agricultural Environment and Resources Institute,Yunnan Academy of Agricultural Sciences Yunnan Kunming 650205;Qujing Soil and Fertilizer Station Yunnan Qujing 655000)
基金
国际植物营养所(IPNI)项目、国家科技支撑项目(2012BAD40B01、2008BADA4B10)。
关键词
玉米
控释尿素
氮素利用率
氮肥农学利用率
产量
Maize
Controlled-release urea
Nitrogen use efficiency
Agronomic efficiency
Yield
