动物营养学报2009，Vol.21Issue(4)：447-453,7.DOI:10.3969/j.issn.1006-267x.2009.04.005
日粮碳水化合物/蛋白质水平对240日龄不同品种猪肌内脂肪含量和胃肠道重量、长度及消化酶活性的影响
Effects of Dietary Carbohydrate/Protein Levels on Intramuscular Fat Concentration and Gastrointestinal Tract Weight, Length and Digestive Enzyme Activity in Different Breeds of 240-day-old Pigs
摘要
Abstract
This experiment was conducted to study the effects of dietary carbohydrate/protein levels on intramuscular fat (IMF) concentration and gastrointestinal tract weight, length and digestive enzyme activity between Duroc×Landrace× Yorkshire (DLY) pigs and Taihu pigs of 240-day-old, and to investigate the relationships among IMF concentration and gas-trointestinal tract weight, length and digestive enzyme activity.Twelve DLY pigs and twelve Taihu pigs were randomly allo-cated to 2 treatments with 6 replicates in each and 1 pig in each replicate according to gender and weight using a 2×2 factors experiment design, and feed either high-carbohydrate/low-protein (HC/LP) or low-carbohydrate/high-protein (LC/HP), respectively.The feeding trial lasted for 90 days.The results showed that compared with LC/HP diet, HC/LP diet could in-crease the IMF concentration of DLY pigs (IMF concentration was 5.83%)(P<0.01) and had a elevated tendency onTaihu pigs (P>0.05), but the effects of the two diets on loin eye area and back fat thickness in two breeds were not signifi-cant (P>0.05); compared with LC/HP diet, HC/LP diet had lower pancreas weight and pancreas index in two breeds of pigs (P<0.05 or P<0.01); the stomach, intestine and pancreas index of Taihu pigs were greater than those of DLY pigs (P<0.01) regardless of HC/LP diet or LC/HP diet.The digestive enzyme activity in the two breeds was lowed by HC/LP diet, but the pancreatic amylase per activity of DLY pigs was lowed by HC/LP diet (P>0.05), moreover, the effects of HC/LP diet on Taihu pigs pepsin and pancreatic lipase activity were significant (P<0.01); the pancreatic lipase activity of Taihu pigs was higher than that of DLY pigs (P<0.01), and pancreatic amylase activity of DLY pigs were higher than that of Taihu pigs in HC/LP diet (P<0.05).Therefore, The IMF concentration of 240-day-old DLY pigs was elevated greatly by LC/HP diet, but the effect of it on loin eye area and back fat thickness in two breeds was little, and the weight of pan-creas in DLY pigs and pepsin and pancreatic lipase activity in Taihu pigs were lowed greatly by HC/LP diet.The effect of HC/LP diet on stomach, liver and small intestinal weight or length was little.关键词
碳水化合物/蛋白质/DLY猪/太湖猪/肌内脂肪/胃肠道Key words
Carbohydrate/Protein/DLY pigs/Taihu pigs/Intramuscular fat/Gastrointestinal tract分类
农业科技引用本文复制引用
刘宏伟,王康宁..日粮碳水化合物/蛋白质水平对240日龄不同品种猪肌内脂肪含量和胃肠道重量、长度及消化酶活性的影响[J].动物营养学报,2009,21(4):447-453,7.基金项目
国家"973"项目(2004CB117506) （2004CB117506）
