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  • Title: Concentration of digestible, metabolizable, and net energy and digestibility of energy and nutrients in fermented soybean meal, conventional soybean meal, and fish meal fed to weanling pigs.
    Author: Rojas OJ, Stein HH.
    Journal: J Anim Sci; 2013 Sep; 91(9):4397-405. PubMed ID: 23893994.
    Abstract:
    Two experiments were conducted to determine the digestibility of energy and nutrients and the concentration of DE, ME, and NE in fermented soybean meal (FSBM), conventional soybean meal (SBM-CV), and fish meal fed to weanling pigs. In Exp. 1, 36 barrows (initial BW: 22.0 ± 3.85 kg) were placed in metabolism cages and allotted to a randomized complete block design with 4 diets and 9 pigs per diet. Feces and urine were collected for 5 d after a 5 d adaptation period. Four diets including a corn-based diet and 3 diets consisting of corn and each of the experimental ingredients (FSBM, SBM-CV, and fish meal) were formulated. Results indicated that the apparent total tract digestibility (ATTD) of GE in corn, FSBM, and SBM-CV was 88.6, 88.2, and 90.3%, respectively, but the ATTD of GE in fish meal (84.0%) was less (P < 0.01) than in the other ingredients. The concentrations of DE, ME, and NE in SBM-CV were 4,553, 4,137, and 2,972 kcal/kg DM. These values were greater (P < 0.01) than the DE, ME, and NE in FSBM (4,296, 3,781, and 2,710 kcal/kg DM), corn (3,951, 3,819, and 2,791 kcal/kg DM), and fish meal (3,827, 3,412, and 2,450 kcal/kg DM). However, FSBM contained more (P < 0.01) DE, ME, and NE than fish meal and more (P < 0.01) DE than corn. The biological value of the protein in fish meal (75.4%) was greater (P < 0.05) than in corn (34.8%) and FSBM (62.8%), and the biological value of protein in SBM-CV (67.1%) was greater (P < 0.05) than in corn but not different from FSBM and fish meal. In Exp. 2, 8 barrows (initial BW: 10.4 ± 0.47 kg) were equipped with a T-cannula in the distal ileum and randomly allotted to a replicated 4 × 4 Latin square design with 4 diets and 4 periods per square. Three diets containing FSBM, SBM-CV, or fish meal as the sole source of AA and a N-free diet were formulated. The standardized ileal digestibility (SID) of all indispensable AA except Lys, Thr, and Trp was greater (P < 0.01) in FSBM than in fish meal. The SID of Met and Val was also greater (P < 0.05) in FSBM than in SBM-CV, but for the remaining indispensable AA, no difference between FSBM and SBM-CV was observed. In conclusion, the concentration of DE, ME, and NE is less in FSBM than in SBM-CV. However, DE, ME, and NE are greater in FSBM than in fish meal, but the SID of most AA is not different between FSBM and SBM-CV although they are greater than in fish meal.
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