动物营养学报2019，Vol.31Issue(10)：4519-4526,8.DOI:10.3969／j.issn.1006⁃267x.2019.10.015
低蛋白质水平饲粮添加不同水平赖氨酸对肥育猪生长性能、胴体性状、肉品质及氮排放的影响
Effects of Different Supplemental Levels of Lysine in Low Protein Diets on Performance, Carcass Traits, Meat Quality and Nitrogen Excretion of Finishing Pigs
摘要
Abstract
This study was conducted to investigate the effect of different supplemental levels of lysine in low protein diets on performance, carcass traits, meat quality and nitrogen excretion of finishing pigs. In experi?ment 1, a total of 108 healthy " Durco×Landrace×Large White" finishing pigs with average initial body weight of (78.19±6.69) kg were assigned into 6 groups with 6 replicates per group and 3 pigs per replicate. Group 1 was normal protein level diet group, which was 12.5% crude protein ( CP) and 0.73% standardized ileal di?gestible lysine ( SID?Lys) ; groups 2, 3, 4, 5 and 6 were low protein level diet ( 10.5% CP) and different SID?Lys groups with the SID?Lys levels were 0.58%, 0.66%, 0.73%, 0.80% and 0.88%, respectively. The experiment lasted for 28 days. In experiment 2, eighteen " Durco×Landrace×Large White" finishing pigs with average initial body weight of (90.56±3.28) kg were assigned into 3 groups with 6 replicates per group and 1 pig per replicate. Pigs in the 3 groups were fed the same diets of groups 1, 4 and 5 in experiment 1, respective?ly. The experiment lasted for 7 days include 3 days preliminary experiment period and 4 days nitrogen balance experiment period. The results showed as follows: 1) reducing dietary protein level had no significant effects on growth performance of finishing pigs ( P＞0.05). Different supplemental levels of lysine in low protein diets had no significant effects on growth performance of finishing pigs ( P＞0.05).2) Reducing dietary protein level had no significant effects on carcass traits of finishing pigs ( P＞0.05) , but significant affected the Longissimus dorsi redness value of finishing pigs ( P＜0.05). Different supplemental levels of lysine in low protein diets had no significant effects on carcass traits of finishing pigs ( P＞0.05 ) , but significant affected the Longissimus dorsi drip loss of finishing pigs ( P＜0.05).3) Reducing dietary protein level significant affected the fecal nitro?gen excretion, urine nitrogen excretion and total nitrogen excretion of finishing pigs ( P＜0.05). Different sup?plemental levels of lysine in low protein diets had no significant effects on fecal nitrogen excretion, urine nitro?gen excretion and total nitrogen excretion of finishing pigs ( P＞0.05). Collectively, reducing dietary protein level have no significant effects on growth performance and carcass traits of finishing pigs, but improve the meat color and decrease the nitrogen excretion. Different supplemental levels of lysine in low protein diets have no significant effects on growth performance, carcass traits and nitrogen excretion of finishing pigs, but im?prove the meat quality.[ Chinese Journal of Animal Nutrition, 2019, 31(10) :4519?4526]关键词
低蛋白质水平饲粮/赖氨酸/生长性能/胴体性状/肉品质/氮排放/肥育猪Key words
low protein level diet/lysine/growth performance/carcass traits/meat quality/nitrogen excre⁃tion/finishing pigs分类
农业科技引用本文复制引用
周华,陈代文,何军,罗玉衡,毛湘冰,虞洁,郑萍,罗钧秋,余冰..低蛋白质水平饲粮添加不同水平赖氨酸对肥育猪生长性能、胴体性状、肉品质及氮排放的影响[J].动物营养学报,2019,31(10):4519-4526,8.基金项目
四川省科技计划项目(2016NZ0006) （2016NZ0006）
