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运用四因素五水平二次通用旋转组合试验设计方法,对高粱杂交种“赤杂28”留苗密度、播种期、种肥硫酸钾、追肥尿素4项主要农艺栽培措施对产量作用的单因素效应、综合效应及交互效应分析,阐明了4项农艺栽培措施对产量的影响和效应。结果表明:在本试验条件下,“赤杂28”获得较稳定的最高产量(11441.74±1087.25)㎏/hm2的栽培措施组合方案(95%置信限)为留苗密度为82 500株/hm2～97 500株/hm2,播种期为5月21日～26日,种肥硫酸钾为112.5㎏/hm2～150㎏/hm2,追施尿素为375㎏/hm2～450㎏/hm2。各因素对产量影响的主次顺序为:尿素>留苗密度>播种期>硫酸钾。
A four-factor and five-level quadratic universal rotary combination experimental design method was used to study the effects of four main agronomic practices on the yield of sorghum hybrid “Azalea 28”, the planting density, the sowing date, Factor effect, comprehensive effect and interaction effect analysis, clarified the effects and effects of four agronomic practices on yield. The results showed that under this experimental condition, the combination plan (95% confidence limit) for the cultivation with the highest stable yield (11441.74 ± 1087.25) ㎏ / hm2 for “Zaza 28” hm2 ~ 97 500 plants / hm2, sowing date May 21 ~ 26, seed fertilizer potassium sulfate 112.5㎏ / hm2 ~ 150㎏ / hm2, topdressing urea 375 为 / hm2 ~ 450㎏ / hm2. The main order of influence of various factors on the yield is: urea> seedling density> sowing period> potassium sulfate.