氮肥和密度对江西晚粳申优26的产量和氮肥利用效率的影响  

Effects of Nitrogen Fertilizer and Density on Yield and Nitrogen Use Efficiency of Late Japonica Rice Shenyou 26 in Jiangxi

作　　者：陈忠平 刘凯丽 文喜贤 孙明珠 乐丽红 王斌强 张昆 CHEN Zhong-ping;LIU Kai-li;WEN Xi-xian(Jiangxi Agricultural Technology Extension Center,Nanchang,Jiangxi 330045)

机构地区：[1]江西省农业技术推广中心,江西南昌330045 [2]余干县农业农村局,江西上饶335100 [3]江西省红壤研究所,江西南昌330046

出　　处：《安徽农业科学》2023年第2期30-32,36,共4页Journal of Anhui Agricultural Sciences

基　　金：上海市科技兴农推广项目(沪农科推字〔2019〕第1-6号);江西红壤双季稻田肥沃耕层构建技术研究与集成示范(20171BBH80020)。

摘　　要：申优26是江西通过“籼改粳”专项引进的双季晚粳稻品种,为了摸索其高效栽培技术,通过田间小区试验,探究施氮量、氮肥运筹和抛秧盘量对其产量及构成和氮肥利用效率的影响。结果表明,申优26在江西中等肥力田块做双季晚稻种植时,随着施氮量和分蘖肥施用比例的增加,其产量和氮肥利用效率呈现先增加后降低的趋势,其适宜施氮量和氮肥运筹比例分别为270 kg/hm^(2)和基蘖穗比例4∶5∶1。随着抛秧盘数量的增加,申优26的产量及氮肥偏生产力也相应等比例增加,且差异达显著水平。因此,从产量及提高氮肥利用效率来看,申优26在江西做双季晚稻种植,适应的施氮量水平为270 kg/hm^(2),基蘖穗的氮肥运筹比例为4∶5∶1,同时增加20%的抛秧盘以增加基本苗。Shenyou 26 is a double-cropping late rice Japonica rice variety introduced through the special project of‘Indica to Japonica’in Jiangxi Province.In order to explore its efficient cultivation techniques,a field plot experiment was conducted to explore the effects of nitrogen application rate,nitrogen fertilizer application and seedling throwing tray on its yield,composition and nitrogen use efficiency.The results showed that when Shenyou 26 was planted as double cropping late rice in medium fertility fields in Jiangxi Province,the yield and nitrogen use efficiency increased firstly and then decreased with the increase of nitrogen application rate and tiller fertilizer application ratio.The optimum nitrogen application rate and nitrogen application ratio were treatment 270 kg/hm^(2),respectively.Results showed that the yield and nitrogen use efficiency of Shenyou 26 increased firstly and then decreased with the increase of nitrogen application rate and tiller fertilizer application ratio.The suitable nitrogen application rate and nitrogen operation ratio were 270 kg/hm^(2) and 4∶5∶1,respectively.With the increase of the number of seedling throwing trays,the yield and partial productivity of nitrogen fertilizer of Shenyou 26 increased in equal proportion,and the difference reached a significant level.Therefore,from the point of view of stabilizing yield and improving nitrogen use efficiency,Shenyou 26 was planted as double-cropping late rice in Jiangxi,and the suitable nitrogen application rate was 270 kg/hm^(2),the nitrogen fertilizer application ratio of basal tillering panicle was 4∶5∶1,and 20%seedling throwing tray was added to increase the basic seedlings.

关 键 词：申优26 江西晚稻 氮肥运筹 栽培密度 氮肥利用效率 

分 类 号：S511.2[农业科学—作物学]