Competition of absorbing water，fertilizer and light between Choerospondias axillaries trees and peanut in the red soil of low hilly land—The water use conditions of Choerospondias axillaries trees and peanut

Choerospondias axillaries trees and peanut of agroforestry in the red soil of low hilly land utilize soil water either in cooperation or in competitin. Choerospondias axillaries trees can absorb water from moisture soil at deep horizon and lift water to the surface of soil for peanut using the roots of trees distributed deeply.Competition of the water between Choerospondias axillaries trees and peanut only takes place in dry season（from July to October）and the competition is not obvious.So the water competition of Choerospondias axillariestrees and peanut of agroforestry is not the main obstacle factor affecting peanut growth.