| Penulis/Author |
WULANDARI (1); Prof. Dr. Ir. Budi Prasetyo Widyobroto, DESS., DEA., IPU., ASEAN Eng. (2); Ir. Cuk Tri Noviandi, S.Pt., M.Anim.St., Ph.D., IPM., ASEAN Eng. (3); Prof. Dr. Ir. Ali Agus, DAA., DEA., IPU., ASEAN Eng. (4) |
| Abstrak/Abstract |
The objective of this study was to determine the in vitro degradation and rumen fermentation characteristics of soybean meal that were protected with different levels of formaldehyde. In a completely randomized design experiment, 4 levels of formaldehyde (0, 0.6, 0.8, 1.0, and 1.2%; volume/weight) were applied on soybean meal. Protected soybean meals were incubated for 48 h using a 2-stage in vitro technique. The results showed that protecting soybean meal with formaldehyde decreased the dry matter and organic matter digestibilities (P<0.05) with the lowest on 0.8 to 1.2% formaldehyde treatments. Although there was no significant effects on rumen culture pH, total and proportion of VFA, a significant decrease in NH3-N concentration and slightly decrease of microbial protein concentration were noticed due to formaldehyde treatments (P<0.05). Low NH3-N and microbial protein concentrations was detected on 0.8, 1.0, and 1.2% formaldehyde treatments 16.3, 15.0, and 10.5 mg/100 mL, respectively, for NH3-N and 8.32, 7.05, and 6.35 mg/mL, respectively, for microbial protein. It can be concluded that protecting soybean meal with formaldehyde can decrease rumen degradation and NH3-N concentration with the cost of microbial protein synthesis. The best concentration of formaldehyde for protecting soybean meal was at 0.8%. |
