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

作　　者：Liu Quanwei Wei Limin Zheng Xinli Sun Ruiping Chao Zhe Liu Hailong Huang Lili Fu Liang Wang Feng 

机构地区：[1]Institute of Animal Science and Veterinary Medicine,Hainan Academy of Sciences,Haikou 571100,China [2]Hainan Key Lab of Tropical Animal Reproduction,Breeding and Epidemic Disease Research,Haikou 571100,China

出　　处：《Animal Husbandry and Feed Science》2020年第1期31-35,共5页动物与饲料科学（英文版）

基　　金：Technical Development Project of Hainan Provincial Scientific Research Institutes(KYYS-2018-05);Special Funds for Local Science and Technology Development Guided by the Centeral Committee(ZY2019HN01).

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.

关 键 词：Protein level CONCENTRATE supplement HAINAN YELLOW CATTLE Production performance SERUM biochemical parameters 

分 类 号：S823.5[农业科学—畜牧学]