Chanjula Pin, Pongprayoon Sahutaya, Kongpan Sirichai, Cherdthong Anusorn
Department of Animal Science, Faculty of Natural Resources, Prince of Songkla University, Songkhla, 90112, Thailand.
Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
Trop Anim Health Prod. 2016 Jun;48(5):995-1004. doi: 10.1007/s11250-016-1047-0. Epub 2016 Mar 30.
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.
本试验旨在评估日粮中添加不同浓度的废植物油粗甘油（CGWVO）对山羊采食量、消化率、瘤胃发酵特性和氮平衡的影响。选用4只平均初始体重（BW）为31.5±1.90 kg的杂交公山羊（泰国本地山羊×盎格鲁努比亚山羊），按照4×4拉丁方设计随机分组。日粮处理中CGWVO占日粮干物质（DM）的比例分别为0%、2%、4%和6%。基于本试验，各处理组间干物质采食量和养分消化系数（DM、OM、CP、EE、NDF和ADF）存在显著差异（P＞0.05），其中采食6% CGWVO的山羊每日干物质采食量和养分摄入量低于采食0%、2%和4% CGWVO的山羊。日粮处理对瘤胃pH值、NH₃-N和血尿素氮（BUN）浓度无显著影响，但添加6% CGWVO时，NH₃-N和BUN低于添加0% CGWVO的日粮（P＜0.05），而添加0%、2%和4% CGWVO的日粮间差异不显著。各处理间氮吸收量和潴留量相似，但添加6% CGWVO时氮吸收量低于其他处理（P＜0.05），而添加0%、2%和4% CGWVO的日粮间差异不显著。基于本研究，全混合日粮中CGWVO含量高达4%时可被山羊有效利用。本研究为利用废植物油生产生物柴油用于山羊生产提供了一种良好的方法。
