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Effect of feeding sericea lespedeza (Lespedeza cuneata) on growth performance,blood metabolites,and carcass characteristics of Kiko crossbred male kids
Institution:1. Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, Canada;2. Division of Gynecologic Oncology, The Ottawa Hospital, Ottawa, Ontario, Canada;3. Department of Laboratory Medicine, Mayo Clinic, Rochester, MN, USA;4. NCIC-CTG, Kingston, Ontario, Canada;5. Department of Pathology and Forensic Medicine, Ribeirão Preto Medical School, University of Sao Paulo, Ribeirão Preto, Brazil;6. Department of Oncology, Queen''s University, Kingston, Ontario, Canada,;7. Department of Pathology and Molecular Medicine, Queen''s University, Kingston, Ontario, Canada;8. Department of Mathematics and Statistics, Queen''s University, Kingston, Ontario, Canada;9. BC Cancer Centre, Vancouver, British Columbia, Canada;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
Abstract:Twenty-four high percentage Kiko crossbred male kids (body weight (BW), 27.8 ± 2.2 kg) were stratified by BW and randomly allocated to one of four experimental treatment groups (n = 6). Diets contained different levels of the condensed tannin (CT) containing forage sericea lespedeza (SL, Lespedeza cuneata) dried meal replacing alfalfa (Medicago sativa) pellets (ALF). Experimental treatments included: the control diet – 0% SL and 30% ALF; 10% SL and 20% ALF; 20% SL and 10% ALF; or 30% SL and 0% ALF as fed. Sericea lespedeza whole plant dried meal, incorporated in the grain mix portion of the diet and the mix was fed daily at 70% of total feed offered, with the remaining 30% consisting of bermudagrass (Cynodon doctylon) hay (BGH). Animals were fed once a day and the intake was adjusted every 3–4 days so that a 4–6% was refused (grain mix/SL and hay). Body weights were taken at the beginning, mid, and end of the study and blood was collected twice, at the beginning and at the end of the study, for complete analysis. The performance period lasted 63 days and at the completion of the study, goats were harvested and carcass characteristics measured. There was no difference in initial or final BW of goats; however, average daily gain (ADG) was higher (quadratic, P = 0.01) in goats consuming either all ALF or SL diets. Average daily dry matter (DM) and CT intake increased (linear, P = 0.04 and P < 0.0001, respectively) as the level of SL increased in the diet; however, body weight gain:feed (G:F, kg/kg dry matter) was lower for 10 or 20% SL diets (quadratic, P = 0.002). Scrotal circumference tended to decrease (quadratic, P = 0.07) in goats fed 10 or 20% SL and height at withers decreased (linear, P = 0.05) with addition of SL. Adjusted body fat thickness decreased (linear, P = 0.02) with added SL. Dressing percentages were low and ranged from 37.6 to 39.1 ± 1.5 for all diets. White blood cells decreased (linear, P = 0.05) and lymphocytes % increased (linear, P = 0.05) with added SL. Serum creatinine kinase and alanine aminotransferase increased (linear, P = 0.01 and P = 0.001, respectively) and serum amylase decreased (linear, P = 0.01) as the level of SL increased. In conclusion, addition of SL up to 30% or CT up to 22.2 mg/kg DM in the diet did not adversely affect growth performance of goats, and it produced lower fat in the carcass.
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