试验材料为四年生盆栽“辽优/平邑甜茶”苹果树(Malus pumila)。每小区2株,重复3次。盆中营养土为有机肥、土、细沙按同等体积配比混合而成,有机质3.6％,pH 7.1。测定病枝率达5O％以上的小叶病株不同器官内的元素含量的结果(表1)表明:1.生长期 The experimental material was potted in four-year potted “Malus pumila”. 2 per plot, repeated 3 times. Nutrients in pots are organic fertilizers. Soil and fine sand are mixed in the same volume ratio with 3.6% organic matter and pH 7.1. The results of determining the content of elements in different organs of lobular diseased plants with the disease rate of more than 50% (Table 1) showed that: 1. The growth period