Nutrient digestibility in finishing pigs fed phytase-supplemented barley-based diets containing soybean meal or canola meal as a protein source

2009 ◽  
Vol 63 (2) ◽  
pp. 137-148 ◽  
Author(s):  
Tofuko A. Woyengo ◽  
Taryn Dickson ◽  
Jason S. Sands ◽  
Charles M. Nyachoti
2017 ◽  
Vol 46 (1) ◽  
pp. 195-199 ◽  
Author(s):  
Hyeok Min Yun ◽  
Xin Jian Lei ◽  
Sang In Lee ◽  
In Ho Kim

2015 ◽  
Vol 153 (5) ◽  
pp. 943-953 ◽  
Author(s):  
S. C. ÁVILA ◽  
G. V. KOZLOSKI ◽  
T. ORLANDI ◽  
M. P. MEZZOMO ◽  
S. STEFANELLO

SUMMARYFour Holstein steers (297 ± 56 kg of body weight (BW)) fitted with duodenal cannula and rumen catheter, were housed in metabolism cages and used in a 4 × 4 Latin Square trial to evaluate the effect of both protein source andAcacia mearnsiitannin extract on digestibility, ruminal fermentation, rumen microbial protein synthesis, N utilization and on duodenal flow of individual amino acids. The diet was offered at restricted amount of 25 g of dry matter (DM)/kg BW and consisted of maize silage plus concentrate, in a proportion of 0·7:0·3 (DM basis) respectively. Concentrate was formulated with either soybean meal or canola meal as protein source, with or without 50 g/kg ofA. mearnsiitannin extract (i.e. 15 g/kg of total dietary DM). There was no effect of protein source on most variables. The apparent and true organic matter (OM) digestibilities, as well as neutral detergent fibre (NDF) digestibility were negatively affected by tannin extract inclusion without, however, affecting digestible OM intake. The amount of nitrogen (N) excreted in faeces increased whereas the urinary N excretion decreased in tannin extract treatments. No interaction time × treatment was detected for any rumen variable and no treatment effect was observed for rumen fluid pH and reducing sugars concentration. Rumen fluid concentration of ammonia N was lower for the canola meal plus tannin extract treatment. Rumen concentration ofα-amino compounds was not affected by tannin extract but was higher when canola meal was the protein source. The duodenal flow of OM, total N,α-amino N and non-ammonia non-microbial N increased with tannin extract inclusion, whereas the duodenal flow of microbial N was not affected by treatment. For both protein sources, the amount of most individual amino acids flowing to the duodenum increased due to tannin extract addition. In conclusion, the dietary inclusion of 15 g/kg DM of tannin extract fromA. mearnsiiimproved the amino acid supply independently of whether the protein source was canola meal or soybean meal, without affecting the amino acid profile, to steers fed maize silage plus concentrate, with a minor but significant impact on OM digestibility.


Author(s):  
S L Traylor ◽  
Robert H Hines ◽  
N Amornthewaphat ◽  
S L Johnson ◽  
P Sorrell ◽  
...  

Author(s):  
T A Woyengo ◽  
R T Zijlstra

Abstract Two experiments were conducted to (1) determine NE values of soybean meal (SBM), Napus canola meal (NCM), Juncea canola meal (JCM), field pea, and wheat millrun (WM) using indirect calorimetry, and (2) compare the determined NE values with the calculated NE values of the same feedstuffs based on a prediction equation. In Experiment 1, 6 ileal-cannulated barrows (31 kg) were fed 5 diets in 5 × 6 Youden square to give 6 replicates per diet. Diets were cornstarch-based diets containing soybean meal (SBM), NCM, JCM, field pea, or WM. The SBM was included as a reference. In Experiment 2, 6 ileal-cannulated barrows (70 kg) were fed a N-free diet for determining energy digestibility and NE values of test feedstuffs fed in Experiment 1 by difference method. The NE values of test feedstuffs were also calculated from the DE values and analyzed macronutrient content of the test feedstuffs (NRC, 2012). On DM basis, SBM, NCM, JCM, field pea, and WM contained 51, 41, 42, 28, and 18% CP; 1.52, 2.95, 2.36, 1.33, and 3.12% ether extract; 2.93, 0.14, 1.44; 36.7, and 28.7% starch; and 5.30, 21.0, 13.4, 9.49, and 16.1% ADF, respectively. The determined NE value for SBM (2.29 Mcal/kg) did not differ from that of NCM (1.72 Mcal/kg DM) or JCM (2.14 Mcal/kg DM). The NCM and JCM did not differ in NE value. Also, the determined NE value did not differ between field pea (2.00 Mcal/kg) and WM (2.55 Mcal/kg). The calculated NE values for SBM (2.18 Mcal/kg DM), NCM (1.73 Mcal/kg DM), and JCM (1.86 Mcal/kg DM) did not differ from the corresponding determined NE values of the same feedstuffs. However, the calculated NE value for field pea (2.51 Mcal/kg DM) was greater (P = 0.004) than the determined NE value of field pea, whereas the calculated NE value for WM (2.27 Mcal/kg DM) tended to be lower (P = 0.054) than the determined NE value of WM. In conclusion, the NE value for SBM and canola meals can be predicted based on the DE value and the macronutrient composition of the same feedstuffs. However, the NE value for field pea and WM may not be predicted precisely based on the DE value and the macronutrient composition of the same feedstuffs.


Sign in / Sign up

Export Citation Format

Share Document