梨树缺铁症状及矫治技术近些年来，由于在果树上应用化肥，尤其是氮肥较多，忽视了有机肥的施用，使土壤理化性状恶化，并带来各种缺素症的发生，其中梨树缺铁性黄化病就有逐渐严重的趋势。１梨树缺铁症的症状树势衰弱，发芽晚７天左右，生长点少，枝条生长量小，节间短，... In recent years, due to the application of fertilizers on fruit trees, especially nitrogen fertilizer, the application of organic fertilizers is neglected, and the physical and chemical properties of the soil are deteriorated, and various kinds of deficiencies occur. Among them, Pear tree iron deficiency disease have gradually serious trend. 1 pear tree symptoms of iron deficiency symptoms of weak, sprouting about 7 days later, the growth point less growth of small branches, internodes short, ...