Effects of Sida rhombifolia L.environment and raising modes on growth performance,meat performance and serum biochemical indices of Ningdu yellow chickens
[Objective]This experiment aims to investigate the impact of the free-rearing system supplemented with Sida rhombifolia L.and raising modes on body measurement,slaughter performance,meat quality and serum biochemical indices of Ningdu yellow chickens.[Method]A total of 180 female Ningdu yellow chickens at 72-day-old were randomly divided into 3 groups:100 birds of free-rearing with Sida rhombifolia L.(SF),50 birds of free-rearing without planting Sida rhombifolia L.(NSF)and 30 birds of cage-rearing system(CK).Two groups of free-ranging individuals were maintained at an equivalent population density.At the age of 121 days,a sample of ten chickens was randomly chosen from each group to undergo body measurement,slaughter performance evaluation,meat quality assessment,and analysis of serum biochemical indices.[Result](1)For body measurement,SF group showed significantly increased body slope length,keel length,and chest width compared to the NSF group(P<0.05).Conversely,CK group exhibited significantly reduced keel length,chest width,and shank length compared with the NSF group(P<0.05).(2)For slaughter performance and meat quality,compared with those of NSF group,percentage of half-eviscerated yield with giblet,percentage of eviscerated yield,percentage of breast muscle yield,gizzard index,spleen index and number of fibers in muscle bundle were notably reduced in CK group(P<0.05)and live weight before slaughter,dressed weight,liver index,percentage of abdominal fat yield,ovary index,oviduct index,intestinal length,the pH value of breast muscle and perimysium thickness were dramatically increased in CK group(P<0.05);gizzard index was significantly reduced in SF group(P<0.05).(3)For serum biochemical indices,CK group exhibited a notable decrease in albumin(ALB)levels and a significant increase in blood urea nitrogen(BUN)levels and glutamic-pyruvic transaminase(ALT-GPT)levels compared with those of the NSF group(P<0.05).Compared with the NSF group,SF group displayed a significant reduction in blood urea nitrogen(BUN)levels and creatinine(CRE)levels(P<0.05).[Conclusion]The free-rearing system effectively improves body measurement,slaughter performance,immune organs development,reduces meat pH value,enhances protein metabolism and liver metabolic function.Supplementing Sida rhombifolia L.in the free-rearing system improves body measurements and potentially mitigates kidney damage in Ningdu yellow chickens.
Ningdu yellow chickensSida rhombifolia L.body measurementslaughter performancemeat qualityserum biochemical indices
万方数据
维普
