Standardized ileal digestibility of amino acids and apparent metabolizable energy in corn and soybean meal for organic broiler chicken production in Ontario

Abstract

Standardized <b>(SID</b>) digestibility of amino acids (<b>AA</b>) and apparent metabolizable energy (<b>AMEn</b>) in samples of organic corn and soybean meal (SBM) were determined. Conventional corn (<b>CC</b>) and SBM (<b>CSBM</b>) samples were tested for comparison. A total of 560, 14 d old male broiler chickens (Cobb 500) were weighed, placed in cages (10 birds/cage) and allocated to 7 (n=8) semi-purified wheat starch-based diets. Diets were: 1) CC, 2) imported organic corn (<b>OCI</b>), 3) local organic corn (<b>OCL</b>), 4) CSBM, 5) imported organic SBM (<b>OSBMI</b>), 6) local organic SBM (<b>OSBML</b>) and 7) nitrogen-free wheat starch (<b>NFD</b>). Only a few differences were observed on SID of AA; SID of lysine was lower (<i>P</i>=0.002) in organic corn samples relative to CC and SID of methionine was lower (<i>P</i>=0.002) in OSBML sample relative to CSBM and OSBMI samples. The AMEn of CC was higher (<i>P</i><0.01) than that of organic corn samples. The AMEn of OSBML was higher (<i>P</i><0.001) than for CSBM and OSBMI, however, the value for OSBMI was higher (<i>P</i><0.001) than for CSBM. In conclusions, the utilization of amino acids in conventional and organic feedstuffs were comparable, however, differences in energy utilization warrant considerations in organic broiler feed formulation.

Impact of fiber on growth, plasma, gastrointestinal and excreta attributes in broiler chickens and turkey poults fed corn- or wheat-based diets with or without multienzyme supplement

“…It is generally accepted that corn-based diets have a superior nutritive value relative to diets based on small grains such as wheat and barley linked to higher concentration of anti-nutritive soluble fiber ( Slominski, 2011 ). However, it has also been demonstrated that the nutritional value of corn is variable and linked to the chemical composition profile ( Cowieson, 2005 ; Leung and Kiarie, 2020 ). However, since the corn used in the present study was from the same source (feed mill), it is postulated that physiological differences between broilers and turkeys could have played a part.…”

Impact of feeding modified soy protein concentrate in the starter phase on growth performance and gastrointestinal responses in broiler chickens through to day 42 of age

“…The conventional SBM, corn, and wheat were procured from local feed mill (Floradale Feed Mill Ltd., Floradale, ON, Canada). The coefficients for standardized ileal digestibility of amino acids and AMEn for SPC (assumed to be equivalent to MSPC) and wheat were obtained from Evonik Aminodat 5.0 (Evonik industries, Essen, North Rhine-Westphalia, Germany) and for corn and SBM from Leung and Kiarie (2020) . Four complete starter diets were formulated: control or control plus MSPC (at 7.7, 10 or 12.5% inclusion).…”

Comparative protein quality in black soldier fly larvae meal vs. soybean meal and fish meal using classical protein efficiency ratio (PER) chick growth assay model

“…The concentrations of CP in casein, SBM (hulled solvent extracted), fishmeal and BSFLM (partially defatted) were comparable with literature values ( NRC, 2012 ; Mwaniki and Kiarie, 2019 ). For feed formulation, the crude protein values for casein and FM were from book values and those of SBM and BSFLM from previous experiments from our laboratory ( Mwaniki and Kiarie, 2019 ; Leung and Kiarie, 2020 ). With exception of casein diet, there were discrepancies between formulated (∼10% CP) vs. analyzed dietary CP.…”