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【目的】通过铁肥管道输液滴干，探索防止苹果缺铁失绿症和提高果实铁含量的途径。【方法】将Fe-N通过管道、滴头直接插入苹果树干，测定不同器官的全铁、活性铁含量，叶片叶绿素相对含量（SPAD值），百叶重、百叶厚、叶绿素荧光、SPAD与活性铁的相关性。【结果】16.4×10-3 mol?L-1 N-Fe处理的叶片SPAD值、百叶重、百叶厚、全铁及活性铁含量显著高于对照，光能转化率和不同器官的活性铁含量也以16.4×10-3 mol?L-1处理最高，所有铁处理果实中的铁含量都显著高于对照。叶片SPAD值与活性铁含量显著正相关。【结论】铁肥管道输液滴干可以防止苹果缺铁失绿症，并显著提高果实铁含量，可以通过SPAD值折算叶片活性铁含量。
【Objective】 The purpose of this study is to find out the ways to prevent the chlorosis and increase the content of iron in apple by dripping dry and dripping iron pipelines. 【Method】 Fe-N was directly inserted into apple tree trunks through pipelines and drip heads. The contents of total iron and active iron in different organs, leaf chlorophyll content (SPAD value), leaf weight, leaf thickness, chlorophyll fluorescence, SPAD and active iron Relevance. 【Result】 The leaf SPAD value, leaf weight, leaf thickness, total iron and active iron content of 16.4 × 10-3 mol·L-1 N-Fe treatment were significantly higher than those of the control. The light energy conversion rate and active iron content of different organs Also highest at 16.4 × 10-3 mol·L-1. The iron content of all iron-treated fruits was significantly higher than that of the control. Leaf SPAD value and active iron content were significantly and positively correlated. 【Conclusion】 The drip irrigation with iron-fat pipelines can prevent iron deficiency chlorosis in apple and significantly increase the iron content of the fruit, and the active iron content can be calculated by SPAD value.