复合棉源蛋白替代豆粕对生长育肥猪生长性能、血清生化、屠宰性能和肉品质的影响OA

The experiment aimed to investigate the effects of replacing soybean meal with composite cotton-derived protein(cottonseed meal,cottonseed protein,puffed cottonseed)on the growth performance,serum biochemistry,slaughter performance,and meat quality of growing-finishing pigs.A total of 72'Duroc×Landrace×Yorkshire'ternary hybrid pigs with similar body weight(half male and half female)were randomly divided into three groups,with four replicates in each group and six pigs in each replicate.Control group(group CON)was fed with basic feed.Group F1 partially replaced soybean meal with composite cotton-derived protein,with addition ratios of 16.00%,14.00%,and 12.00%in the early growth,late growth,and finishing periods,respectively.Group F2 completely replaced soybean meal with composite cotton-derived protein,with addition ratios of 23.00%,21.00%,and 16.00%in the three stages mentioned above.The pre-test period was seven days,and the formal test period was 91 days.The results showed that compared with group CON,the average daily feed intake(ADFI)during the early growth period and finishing period of groups F1 and F2 was significantly reduced(P<0.05),the average daily gain(ADG)during the early growth period of group F1 was significantly reduced(P<0.05),and the feed to gain ratio(F/G)during the early growth period of group F2 was significantly reduced(P<0.05).The concentrations of triglycerides(TG),total cholesterol(TC),and malondialdehyde(MDA)in group F2 were significantly increased(P<0.05).The activity of superoxide dismutase(SOD)and total antioxidant capacity(T-AOC)in group F1 were significantly increased(P<0.05),while the activity of SOD and T-AOC in group F2 were significantly decreased(P<0.05).There was no significant difference in slaughter performance among the groups(P>0.05).The pH45 min value of muscle in group F2 was significantly decreased(P<0.05),while the cooking loss in groups F1 and F2 was significantly increased(P<0.05).The concentrations of most essential amino acids in the longissimus dorsi of groups F1 and F2 were significantly increased(P<0.05),while the concentrations of most saturated fatty acids(SFA),monounsaturated fatty acids(MUFA),and polyunsaturated fatty acids(PUFA)were decreased.The study shows that partially replacing soybean meal with composite cotton-derived protein can effectively improve the growth performance of growing-finishing pigs without significantly affecting slaughter performance.It can also enhance the nutritional value of muscle amino acids and feed conversion efficiency.