An experiment using ¹⁵N isotope tracer showed that in the intercropping system 5 years old and 9 years old Choerospondias axillaries absorbed competitively 9.66% and 30.15%, respectively, of the N fertilizer applied to the peanut growing in between the rows of Choerospondias axillaries, which stimulated growth of the Choerospondias axillaries but affected yield of the peanut.