苹果树缺少微量元素的症状及防治苹果树对微量元素反应比较敏感。各地苹果产区都不同程度出现缺素症状，部分地区（尤其是盐碱地、下潮地）表现特别严重，已成为影响我区苹果生产、产品质量的重要因素、合理施用徽肥对发展苹果生产和提高品质，具有十分重要的作用。一、苹... Apple trees lack of trace element symptoms and prevention and control of apple trees more sensitive to trace elements. In some areas, the apple producing areas all showed the symptoms of deficiency in varying degrees. In some areas (especially in the saline-alkali land and the low-tide area), the performance of the apple-producing areas was particularly serious and became an important factor affecting the apple production and product quality in our district. Improve quality, has a very important role. First, Apple ...