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特优559系江苏省沿海地区农科院选育而成,1996年经江苏省品种审定委员会审定。平均产量超过700kg/667m~2。该品种全生育期140天左右,较汕优63早熟2～3天。适应性广,凡在汕优63种植区域均可种植。根据我市两年来的制种实践平均产量250kg/667m~2左右,高产田块可达300kg以上。要获得理想的制种产量,必须做好以下几个方面的工作。 1 根据父母本生育特性,准确确定播差期母本主茎叶片14片,播种到始穗75天,≥13℃的有效积温940～
Youyou 559 Department of Jiangsu Province Coastal Academy of Agricultural Sciences bred in 1996 by the Jiangsu Provincial Examination and Approval Committee. The average output of more than 700kg / 667m ~ 2. The varieties of the whole growth period of about 140 days, more than Shanyou 63 precocious 2 to 3 days. Wide adaptability, where Shanyou 63 planting areas can be planted. According to the city in the past two years of seed production practice average yield of about 250kg / 667m ~ 2, high-yield plots up to 300kg or more. To get the ideal seed production, we must do the following aspects of the work. According to the characteristics of parental reproductive performance, 14 pieces of main stem leaves of sowing mother were accurately identified, the effective accumulated temperature of ≥13 ℃ was 940 ~