摘要
[目的]为探明江淮地区稻-油两熟制度下油菜免耕直播高产栽培技术。[方法]以核油56为材料,采用田间裂区试验,比较3种施氮水平(Tn)和4种播种密度(Tm)对江淮稻田免耕机开沟直播栽培油菜的产量构成、农艺形状以及生物学产量、秸秆系数等的影响。[结果]在较低密度和中等密度条件下,增施氮肥有利于生物学产量和经济产量的提高。[结论]江淮稻田油菜直播适宜的施氮量为180kg/hm2,适宜的播种密度为3.0kg/hm2;免耕直播油菜的秸秆系数随施氮量增加而增加,随播种密度增加而降低,平均在0.76～0.78。
[Objective] The aim was to explore the high-efficiency cultivation of no-tillage direct seeding of rape under the ripe cycle of rice-rape in Yangtze River and Huaihe River region.[Method] Taking Heyou 56 as material,effects of 3 levels of nitrogen（Tn）and 4 kinds of sowing density（Tm）on yield components,agronomic characters,biological yield,straw coefficient,etc.of no-tillage mechanical trenching rape cultivation by direct seeding in paddy field of Yangtze River and Huaihe River region were studied.[Result] Under the middle and low density,the increase of nitrogen application was beneficial to the improvements of biological yield and economic yield.[Conclusion] The suitable nitrogen application amount of rape cultivating by direct seeding in paddy field of Yangtze River and Huaihe River region was 180 kg/hm2,and the suitable sowing density of rape was 3.0 kg/hm2.The straw coefficient increased with the increase of nitrogen application amount,but decreased with the increase of sowing density,which ranged from 0.76 to 0.78 averagely.
出处
《安徽农业科学》
CAS
北大核心
2010年第27期14901-14902,14910,共3页
Journal of Anhui Agricultural Sciences
基金
国家"十一五"科技支撑计划(2007BAD87B06
2007BAD89B10)
安徽省科技攻关技划项目(08010302160)
安徽省重大攻关项目(09010301021)
关键词
免耕直播
氮肥施用量
播种密度
产量
秸秆系数
No-tillage direct seeding of rape； Nitrogen application rate； Plant density； Yield ＆ economic yield； Straw coefficient；
