Influence of benzoic acid and dietary protein level on performance, nitrogen metabolism and urinary pH in growing-finishing pigs
Influence of benzoic acid and dietary protein level on performance, nitrogen metabolism and urinary pH in growing-finishing pigs
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DOI：
10.1080/17450390600884369
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发表时间：
2006-10-01
影响因子：
2
通讯作者：
Gebert, Stefan
中科院分区：
文献类型：
--
作者：
Buehler, Kathrin;Wenk, Caspar;Gebert, Stefan
本试验研究了苯甲酸和两种蛋白质水平对猪生产性能、氮平衡和尿pH的影响（26 kg至106 kg BW）接受四种饲料之一：含和不含1%苯甲酸的低蛋白水平（分别为LP-和LP+）和含和不含1%苯甲酸的高蛋白水平（分别为HP-和HP+）。在实验的第3、6、9和12周，对动物饲喂限制性生长和肥育饲料，并将其饲养在代谢笼中。添加苯甲酸对增重和饲料转化率没有改善作用。氮摄入量和消化氮仅受日粮蛋白质水平的影响（p < 0.01），而氮平衡在所有四种日粮中相似。日粮中添加苯甲酸能显著提高生长期的氮消化率（p < 0.01），但对肥育期无显著影响。苯甲酸的添加使尿pH值在两个饲养期均降低约一个pH单位，与饲料蛋白水平无关（p < 0.01），并显著增加尿马尿酸浓度（p < 0.01）。本研究的结果表明，饲料苯甲酸对猪有积极的影响，特别是在生长期饲喂低蛋白饲料的情况下。
An experiment was conducted to examine the effect of benzoic acid and two dietary protein levels on pig performance, nitrogen balance and urinary pH. A total of 24 crossbred barrows (26 kg to 106 kg BW) received one of four diets: low protein level with and without 1% benzoic acid (LP- and LP+, respectively) and high protein level with and without 1% benzoic acid (HP- and HP+, respectively). The animals were fed restrictively grower and finisher diets and were kept in metabolic cages in weeks 3, 6, 9, and 12 of the experiment. The addition of benzoic acid did not improve weight gain and feed conversion ratio. N-intake and digested N were only influenced by dietary protein level (p < 0.01), while N-balance was similar in all four diets. Dietary benzoic acid improved N-digestibility in the grower period (p < 0.01) but not in the finisher period. The addition of benzoic acid reduced urinary pH by about one pH-unit in both feeding periods independent of the protein level of the diet (p < 0.01) and increased the concentration of urinary hippuric acid markedly (p < 0.01). The results of this study indicate a positive influence of dietary benzoic acid on pigs especially in case of feeding a low protein diet in the grower period.