Effects of varying levels of phytase supplementation on dry matter and phosphorus digestibility in horses fed a common textured ration |
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| Authors: | DP Patterson MS SR Cooper PhD DW Freeman PhD RG Teeter PhD |
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| Institution: | 1. Pferdezentrum Bad Saarow, Freie Universität Berlin, Bad Saarow, Germany;2. Klinik für Reproduktionsmedizin und Zentrum für Klinische Studien, Vetsuisse Fakultät Zürich, Universität Zürich, Lindau, Switzerland;3. Institut für Genetik, Vetsuisse Fakultät Bern, Universität Bern, Bern, Switzerland;1. Division of Histology and Embryology, Department of Animal Physiology and Biostructure, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Norwida 25, Wroclaw 50-375, Poland;2. Division of Animal Anatomy, Department of Animal Physiology and Biostructure, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Kozuchowska 1/3, 51-631 Wroclaw, Poland;3. Department of Environment Hygiene and Animal Welfare, Faculty of Biology and Animal Science, and Wroclaw University of Environmental and Life Sciences, Chelmonskiego 38C, 51-630 Wroclaw, Poland;1. Department of Physics, Akdeniz University, TR-07058, Antalya, Turkey;2. Faculty of Physics and Center for Nanointegration (CENIDE), Universität Duisburg-Essen, D-47048, Duisburg, Germany;1. Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), 01 Dai Co Viet Street, Hanoi 10000, Vietnam;2. College of Science, Cantho University, Campus II, 3/2 Street, Cantho, Vietnam;3. Green Mobility Collaborative Research Center, Nagoya University, Nagoya 464-8603, Japan;1. Department of Bionanotechnology, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea;2. Department of Advanced Materials Engineering, Hanbat National University, Daejeon, 34158, Republic of Korea;3. National Core Research Center for Hybrid Materials Solution, Pusan National University, Pusan, 46241, Republic of Korea;4. Department of Materials Engineering, Hanyang University, Ansan, Gyeonggi-do, 15588, Republic of Korea |
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| Abstract: | This study examines the effect of phytase supplementation on dry matter and phosphorus digestibility in mature horses. Four mature sedentary quarter horse geldings were used in a 4 × 4 Latin square design experiment. Horses were fed at 2% of the group's average body weight. The experimental diets consisted of textured concentrate of rolled corn, oats, and soybean meal fed in a 50:50 ratio with native prairie grass hay. The treatments were as follows: (1) control (0) with no phytase added to the basal ration, (2) 300 FTU/kg added to the basal ration, (3) 600 FTU/kg added to the basal ration, and (4) 900 FTU/kg added to the basal ration. During the 72-hour collections, total urine and feces were collected. Feed samples were also collect randomly throughout the trial. Feed and fecal sample were analyzed for dry matter, phosphorus, calcium, and magnesium. Urine samples were analyzed for phosphorus, calcium, and magnesium. There was no significance difference in dry matter intake, fecal output, dry matter digestibility, and urinary output across all diets (P > .05). Phosphorus digestibility was not improved with the addition of supplemental phytase (P > .05). The failure to observe an improvement in phosphorus digestibility may be because of the high levels of phosphorus in the diets. Further research needs to be conducted using diets with lower levels of phosphorus. |
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