摘要： 通过对3个山楂品种(面楂、大金星和敞口)7个不同时期叶片矿质营养元素含量的分析，发现Cu、Zn、Fe、Mn、Ca、Mg、K7种元素的含量，除Cu、Mn外均在不同品种间存在着差异，面楂中Zn、Fe、Mg、K的含量较高；大金星中Ca的含量较高；敞口中Zn、Mn、Ca、Mg、K含量均较低。尽管在不同品种间存在着含量上的差异，但它们在年周期的动态变化上又具有一定的规律性，除Zn、Fe前期的变化趋势在品种间表现有差别外，其余元素均表现出大体相似的变化趋势。根据研究结果提出，应针对不同品种制定出不同的营养诊断标准，用叶分析进行营养诊断的适宜时期为7月10日至30日。

关键词: 山楂, 叶片, 矿质元素, 含量, 年周期, 动态

Abstract: The contents of seven elements Cu,Zn,Fe,Mn,Ca,Mg and K in leaves wereanalysed at seven different growth stages in three varieties of hawthorn.The results indicatedthat the contents of each element,except Cu and Mn,were different in different varieties.Higher amounts of Zn,Fe and K were found in Mianzha and higher Ca content in Dajinxing,and lower contents of Zn,Mn,Ca,Mg' and K in Changkou.The seasonal variation of Cu,Mn,Ca,Mg and K contents in leaves was nearly same in different varieties and Z.n and Fecontents changed only at early growth stages in different varieties.The results has suggestedthat different nutrient diagnosis standard should be taken for different variety,and the mostsuitable period for mineral nutrition diagnosis with the help of the leaf analysis should lastfrom lulu 10th to lulu 30th.

Key words: Hawthorn leaf, Mineral nutrient element

中图分类号: 

• S661.5