不同播期和密度对鄂粳403产量及农艺性状的影响  

Effects of different sowing date and planting density on yield and agronomic characters of E-Jing 403

作　　者：李培德[1] 杨国才[1] 李珍连[1] 刘凯[1] 陈志军[1] 周雷[1] 徐华山[1] 闸雯俊[1] 李三和[1] 游艾青[1] LI Pei-de;YANG Guo-cai;LI Zhen-lian;LIU Kai;CHEN Zhi-jun;ZHOU Lei;XU Hua-shan;ZHA Wen-jun;LI San-he;YOU Ai-qing(Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement/Food Crops Institute,Hubei Academy of Agricultural Sciences,Wuhan 430064,China)

机构地区：[1]粮食作物种质创新与品种改良湖北省重点实验室/湖北省农业科学院粮食作物研究所,武汉430064

出　　处：《湖北农业科学》2020年第24期29-31,74,共4页Hubei Agricultural Sciences

基　　金：国家重点研发计划“粮丰”专项(2018YFP0301304);国家水稻产业技术体系基金项目(CARS-01-63)。

摘　　要：以水稻鄂粳403为材料,设置3个播期[S1(5月25日)、S2(6月4日)、S3(6月14日)]和4种密度[D1(45 kg/hm^2)、D2(60 kg/hm^2)、D3(75 kg/hm2)、D4(90 kg/hm^2)],研究麦后直播模式下,其对产量及农艺性状的影响。结果表明,播期对鄂粳403全生育期影响较大,随着播期推迟,全生育期缩短;直播密度对基本苗、最高苗及有效穗影响较大,存在极显著差异,播期对株高、成穗率、产量影响较大,存在极显著差异;早播应适当减少播种量,迟播应加大播种量,以便协同提高直播稻鄂粳403产量。To investigate the effects of different sowing date and planting density on yield and agronomic characters of direct-seedingrice after wheat harvest,japonica variety E-Jing 403 was grown in field experiment with 3 sowing dates S1(05-25),S2(06-04),S3(06-14)and 4 densities D1(45 kg/hm^2),D2(60 kg/hm^2),D3(75 kg/hm^2)and D4(90 kg/hm^2). The results showed that the sowingdate has a great influence on the whole growing period of E-Jing 403. With the postponing of sowing date,the whole growing period isshortened. Direct seeding density had extremely significant effects on basic seedlings,highest seedlings and effective ears,while sowing date had extremely significant effects on plant height,percentage of available tiller and yield. In order to improve the yield of direct seeding rice E-jing 403,the seeding rate should be reduced in early sowing and increased in late sowing.

关 键 词：直播 鄂粳403 播期 密度 产量 

分 类 号：S511[农业科学—作物学]