【摘要】 用叶绿康球肥在苹果树上进行大田对比试验，通过田间调查和室内分析，研究了球肥对苹果树叶片的复绿效果、叶内矿质营养元素及叶绿素含量的影响，以及对苹果的增产效果和改善品质的作用等。结果表明，施用叶绿康球肥可使失绿苹果树叶片的活性铁提高８．７％ ，叶绿素含量提高１８％ ，叶片失绿程度降低２～３ 级，果实产量提高４８．１％ ～７８．６％ ，并可降低叶片中Ｐ，Ｋ，Ｚｎ，Ｍ ｎ 的含量，使这些营养元素与铁的拮抗作用减弱，还能改善苹果品质。更多还原

【Abstract】 The field pairing experiments of Yelükang ball fertilizer were conducted in apple trees.Through field survey and laboratory analysis,the efficiency of recovering green of the ball fertilizer to tree leaves,effect on mineral elements and chlorophyll contents in leaves,and the efficiency of increasing yield and improving quality etc were studied.The obtained results showed:After applying Yelükang ball fertilizer,the active iron in the chlorotic tree leaves increased by 8.7% and the chlorophyll content of apple tree increased by 18%;the chlorotic degree of apple trees decreased by 2-3 scales and the yield per tree increased by 48.1%-78.6%.Through applying ball fertilizer,P,K,Zn and Mn contents in the leaves decreased,and the antagonism between iron and these elements became weaker,thus improving the apple quality.更多还原