Effects of dietary fibre level and body weight of pigs on nutrient digestibility and available energy in high‐fibre diet based on wheat bran or sunflower meal

Abstract

The objectives of this study were (a) to investigate the effect of body weight (BW) on available energy in fibre‐rich diets containing two NDF levels; and (b) to evaluate the effect of fibre type and NDF level on AA digestibility. In Exp. 1, barrows (24 at 33.4 ± 1.1 kg; 24 at 86.8 ± 3.3 kg) were randomly allotted to 4 diets containing a high protein basal (HPB), a low protein basal (LPB), 70% HPB + 30% wheat bran (WB) (HPB‐WB) and 70% LPB + 30% sunflower meal (SFM) (LPB‐SFM). In Exp. 2, barrows (24 at 33.5 ± 1.8 kg; 24 at 87.0 ± 3.8 kg) were randomly allotted to 4 diets containing no SFM with 12% NDF (SFM0LF), no SFM with 16% NDF (SFM0HF), 24% SFM with 12% NDF (SFM24LF) and 24% SFM with 16% NDF (SFM24HF). In Exp. 3, twelve barrows (35.5 ± 3.4 kg) fitted with T‐cannulas were allotted to two 6 × 4 Youden square design with 6 diets (4 same diets as in Exp. 2 and 2 nitrogen‐free diets). The concentration of DE, ME and ATTD of GE, CP, NDF and ADF in diets was greater (p < .01) when fed to 90 kg pigs compared with 30 kg pigs. The ME in ingredients was not affected by BW. The ATTD of NDF was negatively correlated with the CF (r = −.98; p < .01), ADF (r = −.99; p < .01) and ADL content (r = −.96; p < .01). The ME of diets was negatively correlated with the ATTD of CF (r = −.98; p < .01). The addition of SFM increased the standardized ileal digestibility (SID) of Met (p < .05). In conclusion, diets rich in fibre had different nutritional values at different pig weight stages. The AA digestibility depends mainly on chemical composition of diets.

An automatically progressed computer-controlled simulated digestion system to predict digestible and metabolizable energy of unconventional plant protein meals for growing pigs

“…In the current 2 sunflower meals, the range of DE values was similar to that described by Liu et al. (2016) and Lyu et al. (2019) .…”

A corn-fermented protein ingredient can be included in early nursey diets without compromising pig growth performance and health status

“…However, in this study, this utilization of organic P was not estimated during the formulation of the experimental diets, which could explain the digestibility values for the diets containing GDDY. The ATTD of CF, NDF, and ADF was lower in SBM75 and GDDY50 diets, which is likely due to the higher dietary fiber content in these diets compared with CON and FM/ESBM diets, as fiber digestibility is susceptible to hindgut development conditions and a major content fiber in diet reduces nutrient digestibility ( Zhao et al 2018 , Lyu et al 2019 ).…”