不同氮肥用量及施用模式对直播油菜产量的影响  

Effects of Different Amount of Nitrogen Fertilizer and Application Pattern on Yield of Direct Sowing Rape

作　　者：黄益国 李小芳 李倩 雷利琴 王志宾 刘秋霞[2] HUANG Yi-guo;LI Xiao-fang;LI Qian;LEI Li-qin;WANG Zhi-bin;LIU Qiu-xia(Hengyang Institute of Agricultural Sciences, Hengyang 421001, PRC;Huazhong Agricultural University, Wuhan 430072, PRC)

机构地区：[1]衡阳市农业科学研究所,湖南衡阳421001 [2]华中农业大学,湖北武汉430072

出　　处：《湖南农业科学》2017年第9期40-42,共3页Hunan Agricultural Sciences

基　　金：基金项目:国家油菜产业技术体系(CARS-13);三熟区耕地培肥与合理轮作制(201503123)

摘　　要：开展5个氮肥施用水平、3种不同施用模式的油菜直播田间试验,结果表明:在相同氮肥用量情况下,尿素分次施用在油菜不同部位生物量和氮素积累量以及氮肥利用率高于尿素一次性施用处理;氮肥用量在中高氮量下,油菜专用缓控释氮肥的地上部总积累量及氮肥利用率大于施用尿素处理;氮肥在氮肥用量达到180 kg/hm^2时油菜不同部位生物量和氮素积累量以及氮肥利用率达到最大。By carrying out field test study in5nitrogen application levels and3different patterns of application,the result shows:Underthe same amount of nitrogen fertilizer,the different rape parts of biomass,nitrogen accumulation and nitrogen utilization rate of ureaapplied separately are higher than urea applied at one time;In the middle and high nitrogen amount of nitrogen fertilizer,the differentrape parts of biomass,nitrogen accumulation and nitrogen utilization rate of controlled release nitrogen fertilizer for rape are higher thanurea applied;When the amount of nitrogen fertilizer reached180kg/hm2,the different rape parts of biomass,nitrogen accumulation andnitrogen utilization rate reach maximum.

关 键 词：缓控释氮肥 生物量 氮肥利用率 氮素积累量 

分 类 号：S143.1[农业科学—肥料学]