Digestibility of energy, amino acids, and phosphorus in a novel source of soy protein concentrate and in soybean meal fed to growing pigs

Abstract

Three experiments were conducted to determine standardized ileal digestibility (SID) of CP and AA, DE and ME, and apparent total tract digestibility (ATTD) and standardized total tract digestibility (STTD) of P in a new source of soy protein concentrate (SPC) and in soybean meal (SBM). In Exp. 1, 9 barrows (initial BW: 13.08 ± 1.98 kg) were prepared with a T-cannula in the distal ileum and allotted to a triplicated 3 × 3 Latin square design with 3 diets and 3 periods. A nitrogen-free diet and 2 diets that contained corn starch and SPC or SBM as the sole source of CP and AA were formulated. Each period lasted 7 d, and ileal digesta were collected on d 6 and 7 of each period. The SID for Ile, Leu, Phe, Pro, and Tyr was greater ( < 0.05) in SPC than in SBM, but for CP and all other AA, no difference between SPC and SBM was observed. In Exp. 2, 24 barrows (initial BW: 13.94 ± 1.34 kg) were housed individually in metabolism crates and randomly allotted to 1 of 3 diets. A corn-based diet (96.9% corn) and 2 diets that contained corn and SPC or corn and SBM were formulated. Each diet was fed to 8 pigs. Feces and urine samples were collected using the marker to marker method with 5-d adaptation and 5-d collection periods. The DE and ME in SPC and SBM were calculated using the difference procedure. Results indicated that the ATTD of GE was lower ( < 0.05) in SBM than in corn and the DE and ME in SPC were greater ( < 0.01) than in corn and SBM. In Exp. 3, 40 barrows (initial BW: 14.12 ± 2.08 kg) were placed in metabolism crates and allotted to 4 diets in a randomized complete block design with 10 pigs per diet. Two diets were based on SPC or SBM as the sole source of P. Two additional diets were formulated by adding microbial phytase to diets that were otherwise similar to the 2 initial diets. Feces were collected for 5 d after a 5-d adaptation period and values for ATTD and STTD of P were calculated. No differences were observed in ATTD and STTD of P between SPC and SBM, but the ATTD and STTD of P of both SPC and SBM were greater ( < 0.01) if microbial phytase was added to the diets. In conclusion, the concentrations of DE and ME are greater in SPC than in SBM, but the SID of most AA and the STTD of P are not different between SPC and SBM.

Additivity of values for phosphorus digestibility in corn, soybean meal, and canola meal in diets fed to growing pigs

“…The ATTD and STTD of P in corn fed to pigs obtained in this experiment are within the range reported by previous studies [ 3 , 7 , 11 , 13 , 19 ]. The ATTD and STTD of P in SBM are also in accordance with some previous reports [ 10 , 14 , 21 , 23 ], but are greater than values reported by Almaguer et al [ 6 ]. The difference may be explained by the different processes used for producing SBM in feed industry, during which the amount of hulls removed prior to oil extraction varies.…”

Energy, amino acid, and phosphorus digestibility and energy prediction of thermally processed food waste sources for swine1

“…However, although the DE (3,928 kcal/kg DM) and ME (3,875 kcal/kg DM) concentrations in corn were greater ( P < 0.01) than in FVW (DE = 2,570 kcal/kg DM; ME = 2,460 kcal/kg DM), this source of FVW had greater ME content than soybean hulls (2,139 kcal/kg DM) as reported by NRC (2012) . The concentrations of DE and ME in corn obtained in this experiment were similar to those reported in other studies ( NRC, 2012 ; Rojas and Stein, 2013 ; Oliveira and Stein, 2016 ). The relatively high DE and ME content in FW and SMW were likely due to the greater concentration of CP and EE in these two food waste sources compared with corn and FVW.…”

“…This may be explained by the potential biosynthesis of these dispensable AA from other AA in the enterocytes to produce mucin, which contributes to an increase in endogenous Gly and Pro losses when compared with other AA ( Holmes et al, 1974 ; Reis de Souza et al, 2013 ). Other studies have reported similar losses of AA when high-fiber ingredients were fed to pigs to those observed in this study ( Almeida et al, 2011 ; Reis de Souza et al, 2013 ; Oliveira and Stein, 2016 ).…”

Amino acids digestibility of pelleted microparticle protein of fish meal and soybean meal in broiler chickens

“…The differences in results between fish meal and soybean meal is assumably due to the presence of phytate component such as oligosaccharide and anti-trypsin in soybean meal. The inferior results found for soybean meal was seemingly attributable to the presence of phytate compound (Banaszkiewicz, 2011;Tahir et al, 2012), non-protein soluble component such as oligosaccharide (Kocher et al, 2002;Oliveira and Stein, 2016), and trypsin inhibitor (Banaszkiewicz, 2011;Pacheco et al, 2013). Phytate compound in soybean meal has been reported to be varied with the range of betwen 1 and 1.5% (Banaszkiewicz, 2012).…”