摘要
本试验通过在中度黄化的苹果树上喷施不同形态铁盐，以及在中度黄化的梨树和桃树上喷施不同浓度的黄腐酸铁来进行黄腐酸铁防治果树缺铁黄化病的研究。结果表明：黄腐酸铁防治果对缺铁黄化病的效果高于硫酸亚铁，接近于ＥＤＴＡ—Ｆｅ；在供试黄腐酸铁浓度０～１２０ＰＰｍ内，随浓度的增加，防治效果愈好；同样浓度的黄腐酸铁，在桃树上的防治效果较梨树上好。
To study the effect of FA-Fe whicll was extracted from coal on the Fe deficiency yellows, defferent kinds of ferric salt were sprayed onto apple trees of mid-degree yellows and FA - Fe was sprayed onto pear and peach trees of mid Mid-degree yellows in different concentration. The result showed that: FA - Fe was more effective than FeSO4 and was similar to EDTA-Fe in the prevemtion and treatment of Fe deficiellcy yellows in apple trees, and the positive enfluence of it became more and more significant with the increase of its concentration from 0 to 120 ppm. FA-Fe was more effective in peach trees than in pear trees when it was applied in the same concentration.
