Growth of yearling fillies fed alfalfa or soybean meal |
| |
| Institution: | 1. Division of Infection Medicine, Lund University, Lund, Sweden;2. Clinical Microbiology, Labmedicin, Region Skåne, Lund, Sweden;3. Department of Laboratory Medicine Lund, Section of Medical Microbiology, Lund University, Lund, Sweden;1. Department of Animal Science, West Central Research and Extension Center, University of Nebraska, North Platte 69101;;2. Division of Animal Science, University of Missouri, Columbia 65211; and;3. Owner and rancher, Sutherland, NE 69165;1. Pazar Forest Management Directorate, Pazar, 53300 Rize, Turkey;2. Department of Landscape Architecture, Faculty of Fine Art, Design and Architecture, Recep Tayyip Erdo?an University, 53100 Rize, Turkey;2. Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, 5403 1 Ave. S, Lethbridge, AB, T1J 4B1, Canada;3. Department of Biological Sciences, University of Lethbridge, 4401 University Dr. W, Lethbridge, AB, T1K 3M4, Canada;1. Equine Department, Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, Bat B41 & B42, University of Liege, Sart Tilman, 4000 Liège, Belgium;2. EQUI-TEST, Grez-en-Bouère, France;3. Center for Oxygen Research and Development (CORD) Institute of Chemistry Bat B6a, Liège University, Sart Tilman, 4000 Liège, Belgium |
| |
| Abstract: | Sixteen Quarter Horse yearling fillies were used in a 112-day randomized block experiment to determine the comparative efficacy of alfalfa hay protein to support growth in young horses. The yearlings were divided into two groups of eight and paired according to weight and age, with one yearling from each pair randomly allotted to each diet. Group 1 was fed a diet of coastal Bermuda grass hay and concentrate. The corn-based concentrate was supplemented with soybean meal such that the total diet for group 1 contained approximately 13% CP. Group 2 was fed a diet that also contained approximately 13% CP and consisted of alfalfa hay and a similar concentrate without soybean meal. Yearlings were fed the diets in a 60:40 grain-to-hay ratio, and intakes between members of each pair were equalized. The calculated digestible energy density in both final diets was approximately 2.85 mcal/kg, and the protein:calorie ratio for both diets was approximately 45 gm/Mcal. Body weight, body length, heart girth, wither and hip heights, as well as forearm, gaskin and cannon bone circumferences were measured every 28 days. Rump fat thickness was measured ultrasonically every 28 days. Physical measures of growth were similar for horses eating each diet (P>0.05). Also, blood urea nitrogen was similar for horses eating each diet (P>0.05) and was not reflective of differences in nitrogen metabolism. The fillies fed the SBM-supplemented diet retained more nitrogen more efficiently than did fillies fed the alfalfa diet (P<0.05), and the SBM-fed fillies had higher concentrations of osteocalcin on days 14, 28, 42, and 112. It can be concluded that SBM and alfalfa proteins were equally effective in providing growth to young horses; however, the biological value of absorbed nitrogen appeared to be higher in the fillies fed the SBM-supplemented diet. also, differences in serum osteocalcin concentrations indicate that the SBM-fed fillies were experiencing a greater amount of osteoblastic activity than the alfalfa fed fillies. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
