ZHAO J,HARPER M J,ESTIENNE M J,et al.Growth performance and intestinal morphologu re-sponses in early weaned pigs to supplementation ofantibiotic-free diets with an organic copper complex and spray-dried plasma protein in sanitary and non-sanitary environments[J].Journal of Animal Science,2007,85:1302-1310.
[5]
CORL B A,HARRELL R J,MOON H K,et al.Effect of animal plasma proteins on intestinal dam-age and recovery of neonatal pigs infected with rota-virus[J].Journal of Nutritional Biochemistry,2007,18:778-784.
MITCHELL M A,CARLISLE A J.The effect of chronic exposure to elevated environmental temperature on intestinal morphology and nutrient absorption in the domestic fowl (Gullus domesticus)[J].Comparative Biochemistry and Physiology,1992,101A:137-142.
[8]
UNI Z,GAL-GARBER O,GEYRA A,et al.Change in growth and founction of chick small intestine epithelium due to early thermal conditioning[J].Poultry Science,2001,80:438-445.
[9]
DUNSFORD B R,KNABE D A,HAENSLY W E.Effect of dietary soy-bean meal on the microscopic anatomy of the small intestine in the early-weaned pig[J].Journal of Animal Science,1989,67:1855-1863.
[10]
PLUSKE J R.Morphological and functional changes in the small intestine of the newly-weaned pig[C]//PIVA A,BACH KNUDSEN K E,LINDBERG J E.Gut environment of pigs.Nottingham:Nottingham University Press,2001:1-27.
[11]
HAMPSON D J.Alterations in piglet small intestinal structure at weaning[J].Research in Veterinary Science,1986,40:32-40.
SUAREZ B J,VAN REENEN C G,STOCKHOFE N,et al.Effect of roughage source and roughage to concentrate ratio on animal performance and rumen development in veal calves[J].Journal of Dairy Science,2006,90:2390-2403.
[18]
LESMEISTER K E,TOZER P R,HEINRICHS A J.Development and analysis of a rumen tissue sampling procedure[J].Journal of Dairy Science,2004,87:1336-1344.
VAREL V H,ROBINSON I M,POND W G.Effect of dietary copper sulfate,Aureo SP250,or clinoptilolite on ureolytic bacteria found in the pig large intestine[J].Applied and Environment Microbiology,1987,53(9):2009-2012.
[21]
HAMPSON D J,KIDDER D E.Influence of creep feeding and weaning on brush border enzyme activities in the piglet small intestine[J].Research in Veterinary Science,1986,40(1):24-31.
KOJIMA C J,CARROLL J A,MATTERI R L,et al.Effects of weaning and weaning weight on neu-roendocrine regulators of feed intake in pigs[J].Journal of Animal Science,2007,85:2133-2139.
