【摘要】 杂交水稻制种产量较低，这是育种界多年来力求解决的问题。１９９５年，全地区汕优６３组合制种１６６．７ｍ２，平均单产２８１２．５ｋｇ·ｈｍ－２，其中单产超３０００ｋｇ·ｈｍ－２的有３４ｈｍ２。更多还原

【Abstract】 The low yield of cross-bred rice is a problem which seed-nabing experts want to solve for many years.In 1995,The area of Shanyou 63 lreeding in our prefecture is 166.7 hm2 On average,the perunit avea yield is 2812. 5kg.hm-2,of which, The are with above 300kg.hm-2in perunit area yield is 34hm2.更多还原