Effects of Crude Protein Level of Concentrate Supplement on Production Performance and Serum Biochemical Parameters in Post-fattening Hainan Yellow Cattle

更新时间:2023-05-28

【摘要】[Objective]The paper was to investigate the effects of crude protein level of concentrate supplement on production performance and serum biochemical parameters of post-fattening Hainan Yellow Cattle.[Method]Twelve Hainan Yellow Cattles with the same genetic backgrounds and similar initial weight of(168.13±0.55) kg were randomly divided into three treatments.Cattle were fed with concentrate supplement containing different levels of crude protein.The trial lasted 60 d.[Result]The daily gain of 17.56% crude protein group was significantly higher than those of 15.55% and 13.56% crude protein groups(P < 0.05), and the gross profit of 17.56% crude protein group was markedly higher than that of 13.56% crude protein group(P < 0.05), but the feed gain ratio of 17.56% crude protein group was significantly lower than that of 13.56% crude protein group(P < 0.05).Compared with 15.55% and 13.56% crude protein groups, the serum total protein content markedly increased(P < 0.05), but the urea nitrogen level significantly decreased(P < 0.05).[Conclusion]When crude protein level of concentrate supplement was 17.56%, post-fattening Hainan Yellow Cattle could obtain better production performance.

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