一、果树缺铁失绿是全球性的植物营养问题一个多世纪以来,世界各地都相继有果树因缺铁引起黄叶病的报道。在美国明尼苏达的苹果树,加利福尼亚的梨树,佛罗里达的柑橘树,亚利桑那的桃树,犹他州的各种落叶果树等都不同程度地受缺铁失绿的影响。北美大陆、地中海沿岸、原苏联的南部 First, the fruit tree iron deficiency green is a global problem of plant nutrition More than a century, fruit trees around the world have been reported due to iron deficiency caused by yellow leaf disease. In the United States, Minnesota apple trees, California pear, citrus trees in Florida, Arizona, peach trees, Utah, all kinds of deciduous fruit trees are varying degrees of iron deficiency chlorosis. North America, the Mediterranean coast, the southern part of the former Soviet Union