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本试验研究“交3单交”高产制种的合理密度及范围。按667m23000—6000株共设置7个密度试验，结果呈现高密度高产量的趋势，667m2产量以5500株的310．1kg和5000株283．9kg为最高和次高，应是“交3单交”高产制种的最佳合理密度。从低密度到高密度，植株和穗位升高，茎粗略有下降，叶面积指数增加，果穗变化较小，没有出现倒伏、空杆、病虫害等现象，证明“交51”耐密植性好，制种合理高密度能获得高产量。
This study investigated the reasonable density and range of high-yielding seedlings of “3 single cross”. According to 667m23000-6000 strains were set seven density test, the results showed a trend of high density and high yield, yield of 667m3 with 5500 strains of 310.1kg and 5000 strains of 283.9kg for the highest and second highest, should be “pay 3 single” The best reasonable density of high-yielding seed. From low density to high density, the plant and ear height increased, the stem diameter decreased slightly, the leaf area index increased, the change of ear diameter was small, and there was no phenomenon of lodging, empty pole, pest and disease. Reasonable high density seed production to obtain high yield.