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水培缺素试验表明，缺氮、缺磷、缺钾、缺钙、缺镁均明显抑制了芥蓝地上部和根的生长，对地上部抑制作用更大，对株高的抑制作用依次递减。各处理对不同生长时期的茎粗影响不同，缺氮对茎粗的抑制作用表现较早，缺镁则较迟。缺氮、缺磷明显抑制叶数增加，缺钾、缺镁对叶数影响不明显。缺微量元素亦抑制了芥蓝地上部和根的生长，对根的抑制作用更大。同时对１１ 种不同营养元素缺乏症状进行描述，并提出缺素的防治对策
Hydroponic experiments showed that nitrogen deficiency, phosphorus deficiency, potassium deficiency, calcium deficiency, and magnesium deficiency all significantly inhibited the growth of shoots and roots of kale and had greater inhibition on shoots and decreased inhibition of plant height . The effects of different treatments on the stem diameter at different growth stages were different, and the effects of nitrogen deficiency on the stem diameter were earlier, while the lack of magnesium was later. Nitrogen deficiency, phosphorus deficiency significantly inhibited the increase in leaf number, potassium deficiency, magnesium deficiency had no significant effect on leaf number. Trace elements also inhibit the growth of roots and kale roots, the inhibition of roots greater. At the same time, the symptoms of 11 different nutrient elements were described, and the countermeasures for the prevention and treatment of the deficiency were put forward