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Effects of crude glycerin from waste vegetable oil supplementation on feed intake, ruminal fermentation characteristics, and nitrogen utilization of goats

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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.

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Acknowledgments

The authors would like to express their most sincere gratitude and appreciation to the Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, for the financial support of this research (Project No. NAT5122020031S). This work was also supported by Increase Production Efficiency and Meat Quality of Native Beef and Buffalo Research Group, Khon Kaen University.

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Correspondence to Pin Chanjula.

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Animals involved in this study were cared for according to the guidelines of the Prince of Songkla University Animal Care and Use Committee. All standard procedures concerning animal care and management were taken throughout the entire period of the experiment.

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Informed consent was obtained from all individual participants included in the study.

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Supported in part by a grant from Prince of Songkla University.

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Chanjula, P., Pongprayoon, S., Kongpan, S. et al. Effects of crude glycerin from waste vegetable oil supplementation on feed intake, ruminal fermentation characteristics, and nitrogen utilization of goats. Trop Anim Health Prod 48, 995–1004 (2016). https://doi.org/10.1007/s11250-016-1047-0

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