近几年来各地在改变耕作制度,增加复种面积的过程中,都体会到采用早熟丰产适于夏播或秋播的作物品种,是获得高额和稳定产量,增加一季收成的主要一环。因此,各地都迫切需要介绍一些适宜的作物品种。这里将已知的几个早熟丰产的玉米品种介绍出来,以供各地引种试验或试种。需要的种子,可向各个品种的原产地直接联系接洽。 In recent years, all regions have changed the farming system and increased the area of ​​multiple cropping. They all realize that using early-maturing and high-yielding crop varieties suitable for summer sowing or autumn sowing is the main part of obtaining high and stable yield and increasing the harvest for the first season. Therefore, there is an urgent need to introduce some suitable crop varieties everywhere. Several well-known and early-maturing varieties of maize are introduced here for introduction or trial planting. The seeds needed can be contacted directly to the origin of each species.