Effect of supplemental nitrogen from urea on digestibility, rumen fermentation pattern, microbial populations and nitrogen balance in growing goats

摘要: For this study, four Thai Native (TN) x Anglo Nubian (AN) crossbred growing goats with an average liveweight of 19.0+1 kg were randomly used in a 4x4 Latin square design to determine the effect supplemental nitrogen from urea on digestibility, rumen fermentation pattern, microbial populations and balance goats. Fresh elephant grass (FEG) was offered ad libitum as roughage. Four dietary treatments T 1 = at 0% cassava chip, (CC 30%), 2 1% 40%), 3 2% 50%) 4 3% 60%), respectively. Based experiment, it found that there no significant difference (p>0.05) among treatment groups regarding nutrient intake (OMI, CPI, NDFI ADFI) digestion coefficients nutrients (DM, OM, CP, NDF ADF), while digestible CP (g/d) affected by increasing levels. Ruminal volatile fatty acid profiles similar treatments. Moreover, microorganism not The amount N absorption retention treatments, except for which tended be slightly lower compared control diet, but higher output retained (% intake) than control-fed From overall results, can concluded level (3%) could high CC (60%) concentrate when fed FEG good approach exploiting use local feed resources goat production.