6Call ej as R.Bangerth F. Is auxin export of apple fruit an alternative signalfor initiation of flower bud induction. [J]. Acta Hort, 1997,463 :271-277.
7Wertheim S J .Nijsse F,Joosse M L. Benoni telen zonder doorpiunkkenen beurtjaren. [J]. Fruit, 1997,67:475-478.
8McArtney S J,Wells G H. Chemical thinning of Asian and Europeanpear wath ethephon and NAA [J]. N Z J Crop Hort Sci,1995(23) -73-84.
9Stopar M Thinning of flowers/fruitlets in organic apple production [J].J Fruit Ornam Plant Res Specialed,2004(12) :77~83.
10Volz R K,Ferguson I B, Hewett E W, et a!. Wood age and leafarea influence fruit size and mineral composition of apple fruit[J]. Hort Sci,1994,69:385-395.