不同播种密度和施肥量对江淮稻田免耕直播油菜产量形成及农艺性状的影响  

Effects of Different Density and Application Aamount on Yield Formation and Agronomical Character of No-tillage Direct Seeding of Rape

作　　者：汪新国[1] 吴文革[2] 孔令娟[1] 刘磊[1] 王宏斌 吴红星 许有尊[2] 张丽娟[2] 

机构地区：[1]安徽省农技推广总站,安徽合肥230001 [2]安徽省农业科学院水稻研究所,安徽合肥230031 [3]安徽省肥东县农技中心,安徽店埠231600

出　　处：《安徽农业科学》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)

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.

关 键 词：免耕直播 氮肥施用量 播种密度 产量 秸秆系数 

分 类 号：S147.2[农业科学—肥料学]