作物研究2017，Vol.31Issue(4)：342-348,372,8.DOI:10.16848/j.cnki.issn.1001-5280.2017.04.02
机插密度对杂交水稻制种母本群体生长发育特性的影响
Effect of Mechanical Transplanting Density on the Growth and Development Characteristics of the Female Parent Population in Hybrid Rice Seed Production
摘要
Abstract
In order to ascertain the suitable mechanized transplanting density of the female parent population in hybrid rice seed production,the influence of different mechanized transplanting densities on the growth and development characteristics of female parent population were studied,with six chosen female parents,and the control of artificial transplanting (16.7 cm ×20 cm).The results showed that:as the mechanized transplanting density decreasing,the duration from seeding to heading,heading period and middle heading time of the 6 female parents showed prolonged trend;meanwhile the number of spikelet per panicle of each female parent was increasing,and the spike rate was decreased.There was no significant difference in heading period and middle heading time under four different densities.The highest seedling,effective spike and spikelet numbers of unit area Xiangling 628S,Fengyuan A,Guangzhan 63S and Shen 95A,were decreased as the density decreased,these traits achieved the maximum value when the density was high (18 cm × 14 cm).Heading characteristics and spike grain composition of the females were considered comprehensively,the suitable mechanized transplanting density was 14 ×20 (cm) for Y58S,and the density of 14 × 18 (cm) for other five female parents (Xiangling 628S,Fengyuan A,Guangzhan 63S,Shen 95A and LK638S).In order to ensure flower synchronization of the parents,the sowing gap stage of the female and male parents should be adjusted according to the effect of mechanized transplanting density on the duration from seeding to heading of different female parent.关键词
杂交水稻/制种/母本/机插秧/密度/群体特性Key words
hybrid rice/seed production/female parent/mechanized transplanting/density/population traits分类
农业科技引用本文复制引用
杨永标,刘爱民,张海清,陈勇,唐荣,张青,蒋凌云,王明,刘俊龙..机插密度对杂交水稻制种母本群体生长发育特性的影响[J].作物研究,2017,31(4):342-348,372,8.基金项目
国家科技支撑计划(2014BAD06B07). （2014BAD06B07）
