domestica and its closely related species,the questions concerning the wild ancestor of the cultivated apple, the time and place(s) of its origin have remain unresolved.

Shifting from quantity orientation to quality orientation is the world trend for apple cultivation.

The effects on new rhizome increment of three cultivation models of Dioscoren panllunca which being agriculture cultivation model ,apple-orchard cultivation model and shrub silviculture bel cultivation model, have been studied in the present paper.

The effects of different concentration liquid manure on main mineral elements in soil and leaves of potted apple;

The effects of organic liquid manures in potted apple on main mineral elements, fruit yield and quality were studied from 2003 to 2005 in the nursery of Lv mei corporation.

There are 33 wild fruits, 2 semicultivation fruits, and 15 species cultivation fruits in the Yan an Ecoagriculture Demonstration Area, and 5 cultivation fruits can be introduced into this area.