一、前言近年来,国内外对微量元素的研究越来越引起人们的重视。在一些地区微肥的施用,特别是锌肥的施用日益广泛。但是,施用锌肥的效果却不是普遍的。因此,就需要对土壤和植物进行锌营养诊断。土壤有效锌的诊断方法,有比较成功的 DTPA—原子吸收光谱法。而植物锌的营养诊断,特别是要做到予测予报,只通过化学分析,以植物锌含量为指标是困难的。目前,已有不少人在研究玉米、水稻锌营养的酶学诊断方法。酶学诊断方法的理沦依据是:某些金属离子对特种酶的活性具有调节作用。因此,通过 I. Introduction In recent years, the research of trace elements at home and abroad has drawn more and more attention. In some areas, the application of micronutrient fertilizer, especially zinc fertilizer, has become more widespread. However, the effect of applying zinc fertilizer is not universal. Therefore, soil and plant zinc nutrition diagnosis is needed. Soil available zinc diagnostic methods, there are more successful DTPA - atomic absorption spectrometry. The diagnosis of plant zinc nutrition, especially to be measured to be reported, only through chemical analysis, zinc content of plants as an indicator is difficult. At present, many people are studying enzymatic diagnosis methods of corn and rice zinc nutrition. The rationale for the enzymology diagnostic method is that certain metal ions have a regulatory effect on the activity of special enzymes. Therefore, pass