作物品种的混杂退化,是当前生产上存在的一个突出问题。搞好作物品种的提纯复壮,是加速发展农业生产,大幅度提高作物产量的一项有效措施。华主席、党中央对这一工作十分重视。在一九七五年全国种子工作会议上,华主席曾指示“良种的提纯复壮工作要引起大家的重视,这是个大事情”。近年来,烟台地区大搞群众性的花生提纯复壮活动,共选出单株696万株,建立株行圃6189亩,原种圃43461亩,采用原种一代种植的种子田35万余 The mixed degeneration of crop varieties is a prominent issue in current production. Doing a good job of purifying and rejuvenating crop varieties is an effective measure to speed up the development of agricultural production and greatly increase the yield of crops. Chairman Hua and the party Central Committee attach great importance to this work. At the National Seeds Work Conference in 1975, Chairman Hua once pointed out that “the work of purifying and rejuvenating elite seeds should draw everyone’s attention. This is a major event.” In recent years, a large number of peanut purification and rejuvenation activities in Yantai area were carried out. A total of 6.96 million single plants were selected. 6189 mu of plant nurseries and 43,461 mu of original nurseries were established. Over 350,000 seed plants were planted with the original ones.