Abstract: According to the leaf symptoms and the analysis of nutrient elements in leaf and soil, it was determined that the leaf yellowing of Huanghua pear plants in Jianning county of Fujian Province was attributed to Ca deficiency. The Ca level of Huanghua pear plants with yellowing leaves was lower than those of normal plants. It was suggested that Ca deficiency in plants was caused by the low contents of exchangeable Ca and low pH value in soil.

Key words: red earth, Huanghua pear, yellowing leaf, Ca deficiency

摘要： 通过对福建省建宁县黄花梨"黄化园"及"健园"叶片及土壤的营养诊断,探明了该县近年普遍出现的黄花梨植株叶片黄化现象系植株钙素缺乏所致。分析结果表明,"黄化园"叶片含钙量极显著低于"健园";果园土壤交换态钙含量低及土壤酸性强是引起植株钙素缺乏的主要原因。

关键词: 红壤, 黄花梨, 叶片黄化, 缺钙