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以常规油菜(Brassica napus L.)华双5号为材料,调查分析了棉田套播油菜的产量表现和产量差异原因,研究了播期和密度对棉田套播油菜产量及构成因素的影响。结果表明,①棉田套播油菜产量主要分布在3 000～3 750 kg/hm2,种植密度和有效角果数是影响产量的关键因素。②播期和密度对产量构成因素有明显影响,播期推迟,密度增加,单株有效角果数、每角粒数均表现明显减少;播期和密度对千粒重影响较小。③播期、密度及其互作对产量影响显著,播期推迟,油菜产量降低,不同播期要求最适播种密度不同。
Taking Brassica napus L. variety Hua Shuang 5 as the material, the yield performance and yield difference of intercropped rape were studied. The effects of sowing date and planting density on the yield and composition of rape were studied. The results showed that: ① The yield of intercropped rapeseed in cotton field was mainly distributed in 3 000 ~ 3 750 kg / hm2. The planting density and effective pod number were the key factors affecting the yield. The sowing date and density had a significant effect on the yield components. The sowing date was delayed, the density increased, the number of effective pods per plant and the number of grains per horn significantly decreased. The sowing date and density had little effect on 1000-grain weight. ③ sowing date, density and their interaction had a significant impact on yield, delayed sowing date, reduced rapeseed yield, different sowing date required optimal sowing density.