Metabolizable energy, nitrogen balance, and ileal digestibility of amino acids in quality protein maize for pigs

Abstract

BackgroundTo compare the nutritional value and digestibility of five quality protein maize (QPM) hybrids to that of white and yellow maize, two experiments were carried out in growing pigs. In experiment 1, the energy metabolizability and the nitrogen balance of growing pigs fed one of five QPM hybrid diets were compared against those of pigs fed white or yellow maize. In experiment 2, the apparent and standardized ileal digestibility (AID and SID, respectively) of proteins and amino acids from the five QPM hybrids were compared against those obtained from pigs fed white and yellow maize. In both experiments, the comparisons were conducted using contrasts.ResultsThe dry matter and nitrogen intakes were higher in the pigs fed the QPM hybrids (P < 0.05) than in the pigs fed white or yellow maize. Energy digestibility (P < 0.001) and metabolizability (P < 0.01) were higher in the pigs fed the white and yellow maize diets than in those fed the QPM diets. The AID of lysine was higher (P < 0.01) in the QPM diets than in the white and yellow maize. The AIDs of leucine, isoleucine, valine, phenylalanine, and methionine were lower in the QPM diets than those of maize (white and yellow) (all P < 0.05). Maize (white and yellow) had greater SIDs of leucine, isoleucine, valine, phenylalanine, glutamic acid, serine, alanine, tyrosine, and proline (P < 0.05).ConclusionsBased on these results, it was concluded that QPM had a lower metabolizable energy content and a higher amount of digestible lysine than normal maize.

Evaluation of Performance, Nitrogen Metabolism and Tissue Composition in Barrows Fed an n-3 PUFA-Rich Diet

“…It has been acknowledged that we should decrease the diet pollutant component that is excreted as much as possible. Many previous studies have highlighted that nitrogen output can be decreased, particularly through nutritional approaches [9,10,15,16]. Previous research has focused on the digestibility of nutrients supplied by protein and fiber-rich feedstuff.…”

Principales aportes de la investigación del INIFAP a la nutrición porcina en México: retos y perspectivas

“…En lo que respecta al uso de la energía dietética, el aporte del INIFAP consistió en estudios de balances de energía metabolizable (102,103) . Actualmente, el Instituto cuenta con las cámaras respiratorias para determinar en cerdos el contenido de Energía Neta de las dietas, lo que abre la posibilidad de realizar estudios sobre este tema.…”

Available energy and amino acid digestibility of yellow dent corn fed to growing pigs1

“…Indeed, the energy value (DM basis) of corn is significantly correlated with its chemical composition (Li et al, 2014b;Smith et al, 2015). Many factors, especially differences in corn variety and origin, can lead to large variations in the chemical composition of corn (Snow et al, 2004;Kil et al, 2014;Li et al, 2014a;Mariscal-Landín et al, 2014). Because corn accounts for a large proportion of pig's diets, even small variations in the nutrient compositions of corn may lead to dramatic changes in dietary nutrient compositions (Gehring et al, 2013;Malumba et al, 2014).…”

“…Therefore, accurate evaluation of corn can contribute to precise formulation and low feed costs (Stein et al, 2016;Wang et al, 2018). However, previous evaluation studies mostly focused on some special corn varieties and generally measured only 1 sample and notably lack comprehensive evaluation of the AA digestibility in yellow dent corn (Bohlke et al, 2005;Muley et al, 2007;O'Quinn et al, 2000;Mariscal-Landín et al, 2014;Xu et al, 2016). Therefore, the objectives of this study were to determine the energy content and digestibility of CP and AA in 10 yellow dent corns fed to growing pigs and then to establish prediction equations for DE, ME, and digestible AA based on the chemical compositions of corn.…”