Effect of dietary supplementation of gallic acid on nitrogen balance,nitrogen excretion pattern and urinary nitrogenous constituents in beef cattle |
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Authors: | Chen Wei Kai Yang Shixin Lin Zhiwei Xu |
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Affiliation: | State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China |
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Abstract: | The objective of the trial was to study the effects of dietary supplementation of gallic acid (GA) on nitrogen (N) balance, N excretion pattern and urinary N constituents in beef cattle. In a 4 × 4 Latin square design, four male 30-month-old Simmental cattle (443 ± 22 kg live weight) received four levels of GA (purity ≥ 98.5%), i.e. 0, 5.3, 10.5, 21.1 g/kg DM, added to a basal ration. Each experimental period lasted 17 d, consisting of 12 d adaptation and 5 d sampling. The results showed that supplementation of GA at 5.3, 10.5 or 21.1 g/kg DM did not affect the N balance but regulated the N excretion pattern by increasing the ratio of faecal N/urinary N and decreasing the ratio of urinary urea N/total urinary N in beef cattle fed at maintenance level. |
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Keywords: | Gallic acid nitrogen balance nitrogen fixation beef cattle |
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