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宁夏引黄灌区1963年开始配制玉米杂交种,1965年生产上第一次应用双交种.几年来的生产实践证明,玉米杂交种的产量较高,对增产粮食,打好农业翻身仗起了一定的作用.例如,1971年青铜峡县战斗公社东方红九队40亩杂交种玉米,平均亩产1,111斤;吴忠县古城大队杂交种玉米亩产也超千斤;王太堡农业试验场多年来种植的杂交玉米亩产均在千斤以上.这些事例说明,玉米杂交种在
Ningxia Yellow River irrigated areas began to formulate maize hybrids in 1963 and the first application of double crossbreds in production in 1965. Over the past few years, production practices have proved that the yield of maize hybrids is high, which has played a good role in increasing grain output and improving agriculture For example, the 1971 Qingtongxia County Combat Commune Dongfanghongjiu 40 acres of hybrid corn, an average of 1,111 catties per mu; Wuzhong County ancient city brigade hybrid corn per mu too super-pounds; Wang Taibao agricultural test ground over the years The yield of hybrid corn planted are over 1000. These examples show that corn hybrids are in