【摘要】 为研究赶粉结束后提前割除父本对杂交水稻制种产量和种子质量的影响,以‘广8优165’和‘宜优673’两个杂交水稻品种的双亲作为试验材料开展了比较试验。研究发现,赶粉结束后提前割除父本可显著提高杂交水稻制种结实率,增加千粒重,提高种子发芽率,降低易裂颖品种的裂颖率,利于在遭遇不利天气时择机抢收和规避机械混杂,可提高杂交水稻制种产量和增加制种效益。研究证明,赶粉结束后提前割除父本可提升种子质量,增产又增收,是值得推广的一项农艺措施。更多还原

【Abstract】 In order to study the influence of male line’s earlier cutting off after flowering on seed yield and quality in hybrid rice seed production, the parents of two hybrid rice combinations,‘Guang 8 you 165’and‘Yi you 673’, were chosen as the test lines for experimental comparison. It was found that male line’s earlier cutting off after flowering could significantly increase the seed setting rate, 1000-grain weight and germination percentage as well as markedly reduce the cracked glume rate of easily fissured glume combination in hybrid rice seed production. It was beneficial for getting the harvest quickly and avoiding the mechanical mixing by other seeds. Meanwhile, the earlier cutting could improve the seed yield and the economic income in seed production. It is proved that the male line’s earlier cutting off after flowering could improve the seed quality,increase the seed yield and income in seed production. This agronomic measure is worth to be popularized.更多还原