The distribution pattern and growing dynamics of roots system in apple wheat intercropping system was investigated. The results showed that (1) the vertical distribution of the apple root system could reach the depth of 100cm, and its main part (about 80 percent)was in the layer of 20～60cm. The vertical distribution of the wheat root system could reach 80cm, and its 55 2 percent was in the layer of 0～10cm. (2) The horizontal distribution of root system of 4 year old apple tree could reach the depth of 2...