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田间试验结果表明，增施钾肥能促进大白菜对磷的吸收，提高其主要生育期植株地上部磷营养水平；同时还能促进大白菜体内磷营养向软叶和叶球的转运和分配，降低收获期外叶中磷营养的分配比例，有利于叶球内在品质的提高。试验还发现，在施钾（Ｋ２Ｏ）水平较高（１８０、２４０ｋｇ／ｈｍ２）时，硫酸钾处理大白菜地上部的总吸Ｐ量明显高于氯化钾处理，增产效果也更显著。因此，大白菜生产上应避免氯化钾高量单施，而以硫酸钾与氯化钾配施可能更为适宜。
The results of field experiments showed that increasing potassium fertilizer could promote the absorption of phosphorus by Chinese cabbage and increase the phosphorus nutrition of above-ground parts of Chinese cabbage. At the same time, it could also promote the transport and allocation of phosphorus nutrition to soft and leafy domestication of Chinese cabbage, The proportion of phosphorus nutrition in the outer leaves during harvest was in favor of the improvement of the intrinsic quality of the leaves. The results also showed that total potassium uptake by Chinese cabbage with potassium sulfate was significantly higher than that with potassium chloride when K2O was high (180,240 kg / hm2), and the yield was more significant. Therefore, the production of Chinese cabbage should avoid high levels of single application of potassium chloride, potassium sulfate and potassium chloride may be more appropriate.