Abstract: To discuss the reasons of poor growth of Cattleya hybrida, the nutrient elements contents of its leaves and pseudobulbs on different growth conditions were studied, the pH and EC values of leaching solution of cultivation substrate were also detected. The results showed that the contents of K, Ca, Mg, Mn, Zn, Fe, Cu and Mo in poor growth plants were increased significantly with higher pH and EC values of the leaching solution. It was indicated that salt accumulation might be the main reason of poor growth. Therefore, industrial cultivation of C. hybrida was suggested to apply loose substrate, fertilization should not be too much or too thick, and more rain water was recommended.

Key words: Cattleya hybrida, pseudobulb, leaf, culture substrate, salt

摘要： 测定不同生长状况的卡特兰植株成熟假球茎、叶营养元素含量，并检测栽培基质pH、EC值。结果表明，除N、P元素外，生长差的植株K、Ca、Mg、Mn、Zn、Fe、Cu、Mo元素均显著高于生长优良的植株，且生长差的植株栽培基质酸化、盐分积累严重。可见盐分积累是造成植株生长差的原因，建议产业化栽培卡特兰时，采用疏松透气的基质，施肥不宜太浓或过勤，且多淋清水促洗盐。

关键词: 卡特兰, 假球茎, 叶, 栽培基质, 盐分