杂交水稻父本混播和一次移栽高产制种技术研究

Research on producing high-yield hybrid rice seeds by mixed seeding and one-time transplanting of paternal seedlings

杂交父本种子经浸种催芽与浸种不催芽处理后进行混合播种试验。结果表明,两种处理的父本种子以8∶2混合为最佳配比。杂交父本播差试验的穗分化观察表明,以8∶2混合播种的杂交父本其穗分化进程相对延长最为明显。采用本试验杂交制种的新方法可提高制种产量9.92%,比常规制种方法增收节本效益309元(人民币,下同)/666.7 m2,增收率达20.5%。

The treatments of both soaking seeds to hasten germination and soaking seeds not to hasten germination for paternal seeds of hybrid rice were conducted and then mixed seeding tests for the seeds were carried out. The results showed that the optimal mixture ratio of both treated seeds was 8 ： 2 at which the paternal plants had the longest spike differentiation time so that the production of hybrid rice seeds could increase by 9.92% in grain yield and 20.5% （or 309 yuan/666.7 m^2）in economic benefit over the conventional production.