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六年来,我市杂交水稻制种典型表明:提高父母本的早发大穗和异交结实率,是获取制种稳产、高产的经济要素;而在确保安全扬花授粉的前提下,攻苗架、增穗数、促花遇、攻授粉和促异交,是优质高产穗、粒结构的技术关键。一、制种经济要素的结构高产穗、粒结构表明:在培育壮秧与加强早管的条件下,提高早发穗数与总粒数,
In the past six years, the typical hybrid rice seed production in our city shows that increasing the early spikelets and outcrossing percentages of parents is the economic factor to obtain stable and high yield of seed production. On the premise of ensuring the safety of pollination, , By increasing the number of spikes, flowers Huayuan, attack pollination and promote sexual intercourse, is a high-quality spike, grain structure of the key technology. First, the production of economic elements of the structure of high-yield ear, grain structure shows that: in cultivating strong seedling and strengthening the conditions of early tube to increase the number of early spikes and total grain number,