title: Effects of crude glycerin from waste vegetable oil supplementation on feed intake, ruminal fermentation characteristics, and nitrogen utilization of goats.
abstract: This experiment was evaluation of the effects of increasing concentrations of crude glycerin from waste vegetable oil (CGWVO) in diets on feed intake, digestibility, ruminal fermentation characteristics, and nitrogen balance of goats. Four crossbred male (Thai Native × Anglo Nubian) goats, with an average initial body weight (BW) of 31.5 ± 1.90 kg, were randomly assigned according to a 4 × 4 Latin square design. The dietary treatments contained 0, 2, 4, and 6 % of dietary dry matter (DM) of CGWVO. Based on this experiment, there were significantly different (P > 0.05) among treatment groups regarding DM intake and digestion coefficients of nutrients (DM, OM, CP, EE, NDF, and ADF), which goats receiving 6 % of CGWVO had lower daily DMI and nutrient intake than those fed on 0, 2, and 4 % of CGWVO. Ruminal pH, NH3-N, and blood urea nitrogen (BUN) concentration were unchanged by dietary treatments, except that for 6 % of CGWVO supplementation, NH3-N, and BUN were lower (P < 0.05) than for the diets 0 % of CGWVO, while the differences between the diets 0, 2, and 4 % of CGWVO were not significant. The amounts of N absorption and retention were similar among treatments, except that for 6 % of CGWVO which N absorption was lower (P < 0.05) than among treatments while the difference between the diets 0, 2, and 4 % of CGWVO were not significant. Based on this study, CGWVO levels up to 4 % in total mixed ration could be efficiently utilized for goats. This study was a good approach in exploiting the use of biodiesel production from waste vegetable oil for goat production.
authors.affiliation: Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla, 90112, Thailand. pin.c@psu.ac.th.
authors.forename: Pin
authors.initials: P
authors.lastname: Chanjula
authors.affiliation: Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla, 90112, Thailand.
authors.forename: Sahutaya
authors.initials: S
authors.lastname: Pongprayoon
authors.affiliation: Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla, 90112, Thailand.
authors.forename: Sirichai
authors.initials: S
authors.lastname: Kongpan
authors.affiliation: Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
authors.forename: Anusorn
authors.initials: A
authors.lastname: Cherdthong
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D004063:Digestion / Q000187:drug effects; D005247:Feeding Behavior / Q000187:drug effects*; D005285:Fermentation / Q000187:drug effects*; D005990:Glycerol / Q000008:administration & dosage*; D006041:Goats / Q000378:metabolism*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D010938:Plant Oils / Q000032:analysis; D012417:Rumen / Q000187:drug effects / Q000378:metabolism
chemical_list: D010938:Plant Oils; D009584:Nitrogen; D005990:Glycerol
keywords: By-product; Crude glycerin from waste vegetable oil; Goat; Ruminant