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在有效钾水平较低的砂质壤土上进行不同钾肥用量及施用方法试验，并测定了油菜植株不同节位分枝的籽粒产量、产量构成因素及籽粒品质。结果表明：①施钾可显著提高油菜籽粒产量，并改变籽粒产量在主花序及分枝间的分配比例；②油菜不同节位分枝生产力对钾肥的反应不同，钾肥主要提高中、下位分枝的生产力，并缩小分枝间生产力的差距，而对主序及上位分枝的生产力作用较小甚至有一定程度的消弱作用；③施钾数主要提高了分枝的角果数，对千粒重作用较小，对每角粒数有一定的负效应；④施钾可明显提高籽粒含油率，对脂肪酸组成影响很小，但有提高芥酸含量的趋势；⑤分期施钾提高分枝生产力的效果优于一次性基施。
Different K fertilizers and application methods were tested on sandy loam with lower available potassium level. The grain yield, yield components and grain quality of rapeseed branches were determined. The results showed that: ① potassium application could significantly increase the yield of rapeseed and change the distribution proportion of grain yield in main inflorescences and branches; ② the rape productivity of different node rape responded differently to potassium fertilizer, and potassium fertilizer mainly increased middle and lower branch Productivity and narrowing the gap between the productivity of the branches, and the main order and the upper branch of the productivity of the role of small or even a certain degree of weakening; ③ potassium application mainly to increase the number of branches of fruit, The effect is small, and there is a certain negative effect on the number of grains per gigantic; (4) Potassium application can obviously increase the oil content of the grain, but little effect on the fatty acid composition, but there is a tendency to increase the erucic acid content; The effect is better than one-time foundation facilities.