果树巧施铁肥蔷薇科果树，如苹果、梨、黄太平、桃、李树等，出现缺铁症状时，在树茎上钻上小眼投进硫酸亚铁面，肥效特快。方法如下：幼树出现缺铁症状时，可在树茎上分散钻１０来个３～４毫米粗的小眼（至）木质部），将硫酸亚铁固体碾成粉面放在里面，然后取一块石蜡压... Fruit Qiao Shi iron fertilizer Rosaceae fruit trees, such as apples, pears, Huang Taiping, peach, plum, etc., the emergence of iron deficiency symptoms, drilling on the stems cast on the small eye into the ferrous sulfate side, fertilizer fast. The method is as follows: When the young tree appears the symptom of iron deficiency, the rhizome may be loosely drilled 10 to 3 ~ 4 millimeter thick small eyes (to the xylem)), the ferrous sulfate solid is ground into noodles and placed A paraffin pressure ...