Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (7): 2910-2923.doi: 10.11843/j.issn.0366-6964.2023.07.022

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Study on Dietary Crude Protein Level of 11-17 Weeks Old Female Pheasant

FU Xiyao1, CHEN Lihong1, CHEN Xiaoli1, SUN Weili1,2*, GUO Xiaolan1   

  1. 1. Special Animal Microbial Feed Engineering Research Center of Jilin Province, Special Animal Feeding and Comprehensive Utilization Innovation Engineering Center, Institute of Special Products, Chinese Academy of Agricultural Sciences, Changchun 130112, China;
    2. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
  • Received:2022-11-18 Online:2023-07-23 Published:2023-07-21

Abstract: This experiment was conducted to evaluate the effects of dietary crude protein levels on growth performance, nitrogen metabolism, nutrient apparent metabolic rate, serum biochemical indices, muscle chemical composition and slaughter performance of female pheasant aged 11 to 17 weeks, and to study the optimal dietary crude protein level for female pheasant aged from 11 to 17 weeks. A total of 200 11-week-old healthy female pheasants with an initial body weight of (539.43±11.97) g were randomly divided into 5 groups with 5 replicates per group and 8 chickens per replicate. A single-factor experimental design was adopted. Dietary crude protein levels were 15.00%, 16.50%, 18.00%, 19.50% and 21.00%, respectively. The pre-feeding period was 7 days, and the formal period was 49 days. The results showed that:1) Dietary crude protein level significantly affected the average daily gain and feed to gain ratio of pheasant(P<0.05), and the average daily gain in CP 15.00% group was significantly lower than that in the other 4 groups (P<0.05), and the feed to gain ratio in CP 15.00% group was significantly higher than that in the other groups(P<0.05). 2) Dietary crude protein level had significant effects on nitrogen intake, fecal nitrogen, nitrogen retention and nitrogen utilization rate of pheasant (P<0.05), The content of nitrogen intake and fecal nitrogen in 19.50% and 21.00% CP groups were significantly higher than those in the other three groups (P<0.05), and the content of deposited nitrogen in 15.00% and 16.50% CP groups was significantly lower than that in the other three groups (P<0.05). The nitrogen utilization rate of 15.00% CP group was significantly lower than that of 18.00% and 19.50% CP groups (P<0.05).3) There were no significant differences in dry matter metabolic rate, ether extract metabolic rate and gross energy metabolic rate among all groups (P>0.05). 4) There were no significant differences in high-density lipoprotein cholesterol contents among all groups (P>0.05). The serum total protein content in 15.00% CP group was significantly lower than that in 18.00%, 19.50% and 21.00% CP groups (P<0.05), and the serum albumin content in 15.00% CP group was significantly lower than that in 18.00% and 19.50% CP groups (P<0.05). The serum urea content in 15.00% CP group was significantly lower than that in 19.50% and 21.00% groups (P<0.05). The serum triglyceride content of 21.00% CP group was significantly lower than that of 15.00% and 16.50% groups (P<0.05), and the serum low density lipoprotein cholesterol content of 21.00% CP group was significantly lower than that of 15.00%, 16.50% and 18.00% groups (P<0.05). The serum total cholesterol content of 21.00% CP group was significantly lower than that of the other four groups (P<0.05). 5) There were no significant differences in the contents of crude protein and ether extract in leg muscle among all groups (P>0.05), but the content of crude protein in breast muscle of CP 15.00% group was significantly lower than in 18.00%, 19.50% and 21.00% groups(P<0.05). The ether extract content of pectoral muscle in 15.00% CP group was significantly higher than that in 18.00%, 19.50% and 21.00% groups(P<0.05). 6) There were no significant differences in dressing performance(except percentage of abdominal fat) and organ index among all groups (P>0.05).and the percentage of abdominal fat in 15.00% group was significantly higher than that in 18.00%, 19.50% and 21.00% groups (P<0.05). In conclusion, pheasants with 18.00% and 19.5% crude protein levels can obtain higher average daily gain, lower feed/gain, and better nitrogen utilization. When CP is greater than 15.00%, serum lipid indexes are better, serum protein and urea contents are lower, and the protein content in pectoralis is higher and the fat content is less. Therefore, it is recommended that the crude protein level of female pheasants aged 11 to 17 weeks should be 18.00%-19.50%.

Key words: female pheasant, crude protein, growth performance, nutrient apparent digestibility, serum biochemical indices, slaughter performance

CLC Number: