Evaluation of analytical and statistical approaches for predicting in vitro nitrogen solubility and in vivo pre-caecal crude protein digestibility of cereal grains in growing pigs.

Different analytical (enzyme system and near-infrared spectroscopy (NIRS)) and statistical (single and multiple regressions) approaches were used to predict in vivo standardized pre-caecal digestibility (PCD) of crude protein (CP) and amino acids (AA) in cereal grains for growing pigs as well as in vitro nitrogen (N) solubility. Furthermore, different chemical and physical characteristics were categorized (e.g.

Determination of basal ileal endogenous losses and standardized ileal digestibility of amino acids in barley fed to growing pigs.

Background: Basal ileal endogenous amino acid (AA) losses (IAA) and standardized ileal digestibility (SID) values of cereal grains, such as barley, are apparently underestimated when determined according to the nitrogen (N)-free method. Regression analysis between the dietary apparent ileal digestible content (cAID) and total crude protein (CP) and AA can be considered as alternative approach to obtain more accurate values for IAA and SID of AA in cereal grains.

Methods: Eight hulled barley genotypes were used, with barley being the only source of CP and AA in the assay diets.

Wheat and barley differently affect porcine intestinal microbiota.

Background: Diet influences the porcine intestinal microbial ecosystem. Barrows were fitted with ileal T-cannulas to compare short-term effects of eight different wheat or barley genotypes and period-to-period effects on seven bacterial groups in ileal digesta and faeces by qPCR.

Results: Within genotypes of wheat and barley, there was no difference (P > 0.