8Lawrence T L J. The effects of cereal particle size and pelleting on the nutritive value of oat - based di- ets for the growing pig [J]. Anim. Feed Sci., 1983 (8):91.
9Wondra K J, Hancock J D, Kennedy G A, et al. Effects of mill type and particle size uniformity on growth performance, nutrient digestibility and stom- ach morphology in finishing pig [J]. J. Anim. Sci. , 1995 (73) :2564.
10Amerah A M, Ravindran V, Lentle R G, et al. Feed particle size:Implications on the digestion and per- brmance of poultry [J]. World' s Pouh. Sci. J. ,2007 (63) : 439 - 451.