Abstract:

The spatial distribution characteristics of apple tree fine roots in the apple-wheat intercropping were analyzed in order to provide the basic documents for constructing the model of water uptake by roots and analyzing the water ecological characteristics of the inter cropping in the hilly area of Taihang Mountain. The main results showed that : vertically, the fine roots concentrated at the 0～80 cm soil zone where the amount of the fine roots accounted for 94.33% of the total; horizontally, the amount of the fine root in the wheat zone and the tree land accounted for 60 29% and 39.71% of the total respectively;the regression function between the fine roots density(RD:cm·cm^-3) , the soil depth (Z:cm) and the distance from the tree row (X:cm)was the following: RD=- 6.617×10^-9Z⁴+1.8149×10^-6Z³-1.7526×10^-4Z²+4.9418×10^-3Z-5.83×10^-7X²+ -2.16×10^-5X+1.1299ZX+0.06359,r=0.8647.

Key words: Apple-wheat intercropping, Fine roots of apple tree, Spatial distribution characteristics