摘要
春季杂交稻母本撒播制种．由于群体结构和田间小气候得到改善，与常规制种比较．单位面积有效穗和总颖花量增加１０％～１５％，异交结实率提高约４．２％，一般增产１５％左右．母本撒播还可避免移栽植伤、减轻回青期低温引起的僵苗不发，促进个体早生快发，较快地形成以低位分蘖为主体的高产群体．
Direct
seeding of mother parent in hybrid rice seed production in spring could improve the population
structure and the field micro-climatic conditions. Effective panicles and total spilkelets increase
10%～15%,and the cross-fertility increases 4.2%. The yield output increases siqunificantly
15%. The direct seeding is beneficial to avoid planting injury,and to reduce rigor seedling by
low temperature,and to enhance early tillering growth of indi-vidual plant,and to constitute
high-yielding population consisting of lower-node tiller early.
关键词
水稻
制种
亲本
撒播
杂交水稻
母本
移栽
paddy
production of
hybrid seeds
parents
broadcast sowing/hybrid rice
mother parent
