优质杂交早稻岳优108高产制种技术

通过3a的观察和制种实践,总结了岳优108亲本的特征特性及其高产制种技术.制种成败的关键在于把握好播种期,在湘北丘陵地区岳优108父母本最为适宜的播差期为:母本岳4A在3月29日播种,父本岳恢108在4月10日播种,(一般以母本播后11～13d、叶龄2.5～2.7叶时播种父本为宜).同时要培育多蘖壮秧,适时移栽;合理密植,促进双亲群体结构协调发展;加强肥水管理,创建高产群体结构;科学喷施九二0,提高异交结实率;严格去杂去劣,确保种子质量;加强病虫防治等,确保丰产丰收.

High-yield Seed Production Techniques for Quality Early Hybrid Rice-Yueyou108

Though three years observation and seed pmducing practice,the charactem of Yueyou108's parents and its high-yield seed production techniques were summarized.The key of seed production is selecting right sowing period.The optimum sowing gap stage for Yueyou108's parents in hilly area of Northern Hunan was as follows:female parent (Yue4A)sowing at Mar.29th and male parent(Yuehui 108)sowing at Apr.10th,which means male parent should sowing at 11 days to 13 days after sowing female parent and when leaf age was 2.5～2.7 leaves.Meanwhile.in order to guarantee high-yield and abundant harvest,it should transplant at right time to breed multi-tiller seedlings,rational close plant to promote coordinated development of parents'colony structure,enhance management of fertilizer and water to create highyield colony structure,scientifically spray gibberellin to improve outcrossing rate,roguing the weak rigorously to ensure the quality of seeds,and strengthen the control of disease and insect pest.