Effects of Dietary Crude Protein Level on Performance, Hatching Performance and Serum Biochemcial Indexes of Yili Geese
ZHAO Xiaoyu1, WU Yingping1, PENG Xiao1, WANG Junhua1, DUAN Yuqing1, LI Zhipeng1, LI Haiying1, LU Lizhi2
1. College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China;
2. Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China
Abstract：This experiment was conducted to study the effects of dietary crude protein level on performance, hatching performance and serum biochemical indexes of Yili geese, and to determine the requirement of crude protein for Yili geese during laying period. A total of 200 Yili geese aged 3 years old with similar body weight and good health were selected, and were randomly divided into 4 groups with 10 replications and 5 layers per replication.The crude protein level of the control diet was 11.20%. The experimental groups fed the test diets with crude protein levels of 13.86%, 15.20% and 16.48%, respectively. The nutrient levels of other diets remained the same. The pre-experiment lasted for 7 days, and the experiment lasted for 63 d. The results showed as follows:1) there were no significant differences in average daily feed intake (ADFI), average egg weight and qualified rate of egg among the groups of Yili geese during laying period (P>0.05). Compared with the control group, the laying rate, daily egg yield and feed to egg ratio of 13.86%, 15.20% and 16.48% dietary crude protein groups were significantly or extremely significantly increased (P<0.05 or P<0.01), respectively. 2) Compared with the control group, the fertilization rate and hatchability rate of fertile eggs of 15.20% and 16.48% dietary crude protein groups were significantly or extremely significantly increased (P<0.05 or P<0.01), respectively. And there was no significant difference in healthy geese of rate among groups (P>0.05). 3) Compared with the control group, the activities of serum aspartate aminotransferase and alanine aminotransferase of 13.86% crude protein group were significantly or extremely significantly increased (P<0.05 or P<0.01). The contents of serum total protein and globulin, also the activities of aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase of 15.20% dietary crude protein group were significantly or extremely significantly increased (P<0.05 or P<0.01). The contents of serum total protein, albumin and uric acid, also the activities of alanine aminotransferase and alkaline phosphatase of 16.48% dietary crude protein group were significantly increased (P<0.05). In conclusion, under the conditions of this experiment, it is indicated that the appropriate level of dietary crude protein is 15.20%, which can get better performance, hatching performance and serum biochemical indexes of Yili geese during laying period.
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ZHAO Xiaoyu, WU Yingping, PENG Xiao, WANG Junhua, DUAN Yuqing, LI Zhipeng, LI Haiying, LU Lizhi. Effects of Dietary Crude Protein Level on Performance, Hatching Performance and Serum Biochemcial Indexes of Yili Geese. Chinese Journal of Animal Nutrition, 2019, 31(4): 1630-1636.
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