中国水稻科学2017，Vol.31Issue(1)：81-90,10.DOI:10.16819/j.1001-7216.2017.6036
播种方式和播种密度对杂交籼稻机插秧节本增效的研究
Effect of Seeding Method and Density on the Benefit of Mechanical Transplan-ting in indica Hybrid Rice
摘要
Abstract
[Objective]Our purpose is to investigate the rice seedling growth characteristic,quality of transplanting,rice yield and economic benefits of sparse seeding in indica hybrid rice.[Method]The seeds of F you 498 and Ⅱ you 498 were used as materials to develop and chose the optimal drilling seeding machine,then a two-factor split-plot field experiment was conducted with seeding method as main plot and seeding quantity as sub-plot.[Results]The results showed that sowing in drill was contributive to unifrom growth of seedings with 24 lines being the best.The rice seedlings under sparse seeding began to grow tiller 14 days after seeding with the growth rate of tiller peaking between 17 -23 days after seeding.With the increasing seeding density,seedling rate,dry matter accumulation,root shoot rati-o,grain plumpness,N accumulation quantity,the percentage of tiller occurrence,rooting ability and leakage rate showed a tendency of decreasing.At the same time,the number of productive panicles increased,the grain number per panicle decreased and the grain yield increased at first and then decreased.The seedling quality under drill seeding was better than broadcast seeding,under which the seeds grew into strong seedlings and had a higher grain yield.[Conclu-sion]By comprehensively comparing cost and output,the drill seeding at the seeding rate of 50g/disc had a good coor-dination between seedling population density and individual advantage and the input-output ratio was the highest and had a higher economic benefit.关键词
机插/杂交稻/条播/稀播/产量/经济效益Key words
mechanical transplanting/hybrid rice/drilling seeding/sparse seeding/yield/economic efficiency分类
农业科技引用本文复制引用
胡剑锋,杨波,周伟,张培培,张强,李培程,任万军,杨文钰..播种方式和播种密度对杂交籼稻机插秧节本增效的研究[J].中国水稻科学,2017,31(1):81-90,10.基金项目
国家粮食丰产科技工程资助项目(2011BAD16B05) （2011BAD16B05）
农业部公益性行业科研专项(201303129). （201303129）
