玉米中矮秆杂交种具有植株不高,株型紧凑,果穗上部叶片较直立的特点,适于密植,有利于增加群体达到增产的目的。我所经过两年小区试验,从选育的中矮秆杂交种中,又选出了几个较好的组合。1980年我们以这些较好的组合与普通株型的单交种进行产量及经济性状的比较,从而了解它们在加大密度时的产量表现。从中选出较好组合供 Dwarf hybrid corn with low plant height, plant compact, upper ear leaves more upright characteristics, suitable for close planting, is conducive to increasing the population to achieve the purpose of increasing production. After two years of community trials, I selected a few good combinations from medium-dwarf hybrids. In 1980, we compared the yield and economic traits of these better crosses with that of the common plant type to understand their yield performance at increased density. Choose a better combination for them