四川省凉山彝族自治州地处四川省西南部,是该省苹果重点产区之一。苹果树大部份分布在海拔1600～2400米的二半山地区,土壤多属黄壤,黄棕壤,偏酸,土壤淋溶作用强烈,不但有机质含量低而且水溶性硼含量极低,土壤水溶性硼仅有0.03～0.27ppm。经1979～1982年四年间硼素营养诊断,该地区主栽品种金冠叶片硼的各项临界浓度指标为: Liangshan Yi Autonomous Prefecture in Sichuan Province is located in the southwestern province, is the province’s key producing areas of Apple. Most of the apple trees are distributed in the second half of the mountain range of 1600 ~ 2400 meters above sea level. Most of the soil is yellow, yellow brown, partial acid, soil leaching is strong, not only organic matter content is low but water soluble boron content is extremely low, Boron is only 0.03 ~ 0.27ppm. By 1979 to 1982 four years of boron nutrition diagnosis, the main varieties of gold in the region of the boron crown of the critical concentration targets are: