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用特制细砂培育“蜜露”(Hcneydew)栽培种番木瓜,其间施用完全肥料,铁、锌、硼三种元素的亏缺水平分别为0.014～0.056、0.0065～0.013和0.0033～0.033毫克/升。铁和硼缺乏症出现于幼叶,而锌缺乏症则出现于中间叶片。铁缺乏症对植株生长的抑制最严重,而锌缺乏症的抑制作用最小。严重缺铁、锌或硼的植株,其每克叶片干物质中的铁、锌、硼含量分别为85、13和6.7微克;而正常植株的则分别为140、22.4和17.3微克。
The cultivars Papaya were cultivated with special fine sand with Hcneydew. The deficiencies of three fertilizers including iron, zinc and boron were 0.014 ~ 0.056, 0.0065 ~ 0.013 and 0.0033 ~ 0.033 mg / L . Iron and boron deficiency appear in young leaves, while zinc deficiency appears in the middle leaves. Iron deficiency has the strongest inhibition of plant growth, while zinc deficiency has the least inhibitory effect. The plants with serious iron deficiency, zinc or boron had 85, 13 and 6.7 μg of iron, zinc and boron per gram of leaf dry matter, while those of normal plants were 140, 22.4 and 17.3 μg respectively.