干化二号是以IR_(24)为母本,献党一号为父本,通过化学杀雄后配制成的杂交水稻。1978年以来,我市累计种植面积达十万多亩,平均单产占目前水稻品种的第一位。然而,化杀制种的技术体系至今仍不甚完善,产量、纯度也较低。据我市六年来对770亩制种田的调查,平均单产84.7斤,纯度60.2%,因干化二号有显 Drying on the 2nd is based on IR_ (24) as the mother, the first party to provide the father, through the chemical maleicide after the preparation of hybrid rice. Since 1978, the accumulated planting area in our city has reached 100,000 mu, and the average yield occupies the first place among the current rice varieties. However, the technical system of killing species is still not perfect, yield and purity are also low. According to the survey of 770 mu farming in our city in the past six years, the average yield was 84.7 kg and the purity was 60.2%