一、引言 水土保持是开发山地果园的重要措施。很多山地果园由于没有作好这一工作,以致引起表土大量冲刷,水分养分流失严重,甚至露出果树根系与底层岩石,使果树植株生长结果受到影响。反之,某些山地果园,由于加强和重视了水土保持工作,并 I. Introduction Soil and water conservation is an important measure to develop mountain orchards. Many mountain orchards did not do this work, resulting in massive erosion of topsoil, water and nutrient loss serious, or even exposed the roots of fruit trees and rock bottom, so that the growth of fruit trees affected the plant. On the contrary, some mountain orchards, due to strengthen and attach importance to soil and water conservation work, and