Benzoic acid supplementation improves the growth performance, nutrient digestibility and nitrogen metabolism of weaned lambs

被引:1
|
作者
Zhang, Wenjie [1 ]
Sun, Shuo [1 ]
Zhang, Yaqian [1 ]
Zhang, Yanan [1 ]
Wang, Jianguo [2 ]
Liu, Zhiqiang [2 ]
Yang, Kailun [1 ]
机构
[1] Xinjiang Agr Univ, Coll Anim Sci & Technol, Xinjiang Key Lab Meat & Milk Prod Herbivore Nutr, Urumqi, Peoples R China
[2] Xinjiang Shangpin Meiyang Technol Co Ltd, Changji, Peoples R China
关键词
benzoic acid; weaned lambs; hippuric acid; growth performance; nitrogen metabolism; HIPPURIC-ACID; UREA NITROGEN; URINE; CONSTITUENTS; DERIVATIVES; EXCRETION; BALANCE; PLASMA; LEVEL; RUMEN;
D O I
10.3389/fvets.2024.1351394
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Nitrogen is one of the essential components of proteins and nucleic acids and plays a crucial role in the growth and development of ruminants. However, the nitrogen utilization rate of ruminants is lower than that of monogastric animals, which not only reduces protein conversion and utilization, but also increases manure nitrogen discharge as well as causing environmental pollution. The lamb stage is an important period in the life of sheep, which can affect the production performance and meat quality of fattening sheep. The purpose of this experiment was to explore effects of benzoic acid supplementation on growth performance, nutrient digestibility, nitrogen metabolism and plasma parameters of weaned lambs. A total of 40 weaned male Hu sheep lambs with similar body weight were randomly divided into 4 groups: control with no benzoic acid (0 BA) and the lambs in other 3 groups were fed 0.5, 1, and 1.5% benzoic acid on the basis of experimental diet (0.5, 1, and 1.5 BA, respectively). The experiment lasted for 60 days. Results showed that the average daily gain of 1 BA group was significantly increased (p < 0.05) when compared to 0 and 1.5 BA groups, while an opposite tendency of dry matter intake to average daily gain ratio was observed. The dry matter, organic matter, neutral detergent fiber and acid detergent fiber digestibility of 1 BA group was significantly increased (p < 0.05) as compared with 0 and 1.5 BA groups as well as plasma albumin content. Also, the urinary hippuric acid and hippurate nitrogen concentrations in 1 and 1.5 BA groups were higher (p < 0.05) than those in 0 and 0.5 BA groups. Additionally, the nitrogen intake in 0.5 and 1 BA groups was significantly increased (p < 0.05) when compared to other groups. At 1 h after morning feeding, the plasma benzoic acid concentration of 1 BA group reached up to maximum value and was higher (p < 0.05) than other groups, and then began to decrease. Similarly, the hippuric acid concentration in plasma of 1 and 1.5 BA groups was higher (p < 0.05) than that of 0 BA group from 1 to 4 h post morning feeding. At 3 h after feeding, the urea nitrogen concentration in plasma of 0 BA group was higher (p < 0.05) than that of 1.5 BA group. Overall, the appropriate supplementation of benzoic acid (1%) in the diet can improve growth performance and nitrogen metabolism of weaned lambs.
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页数:11
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