Correlations of protein deposited in growing female pigs to ileal and faecal digestible crude protein and amino acids

1985 ◽  
Vol 12 (2) ◽  
pp. 145-159 ◽  
Author(s):  
Arnold Just ◽  
Henry Jørgensen ◽  
JoséA. Fernández
Keyword(s):  
Amino Acids ◽  
Crude Protein ◽  
Digestible Crude Protein

scholarly journals Comparison of different protein evaluation systems for growing pigs: Digestible crude protein, and total, faecal digestible and ileal digestible amino acid intakes as performance response predictors

1994 ◽  
Vol 3 (5) ◽  
pp. 429-437
Author(s):  
Jarmo Valaja
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Crude Protein ◽  
Growing Pigs ◽  
Regression Equations ◽  
Feed Conversion ◽  
Response Predictors ◽  
Carcass Parameters ◽  
Digestible Crude Protein ◽  
Better Than

The validity of apparent faecal digestible crude protein and total, apparent faecal or ileal digestible amino acid intakes (lysine, threonine and methionine) as animal performance predictors was evaluated on the basis of digestibility coefficients obtained from the literature and performance and carcass parameter data from five different experiments on growing pigs. Correlations and regression equations were calculated between daily digestible crude protein or amino acid intakes and the performance and carcass parameters of the pigs. No connection was found between digestible crude protein intake and the performance of the pigs. The correlations were highest between different lysine intakes and daily gain (DG) (r = 0.808-0.867, p < 0.001). Ileal digestible lysine intake correlated with the performance of the pigs better than did intakes of total or faecal digestible lysine. The feed conversion ratio (FCR) (p < 0.05), and the thickness of back (BF) (p < 0.001) and side fat (SF) (p < 0.001) correlated highly with ileal digestible lysine intake. The correlations between these parameters and total or faecal digestible lysine intakes were lower but also significant (total lysine: BF p < 0.001, SF p < 0.01 and faecal digestible lysine: BF p < 0.01, SF p < 0.05). The regression equations agreed well with the coefficients of correlation. Ileal digestible lysine intake explained changes of performance and carcass parameters better than did intakes of total and faecal digestible lysine. The study confirms the advantage of using ileal digestibility coefficients of amino acids for detecting differences in the supply of amino acids from different feeds.

scholarly journals The influence of slowly and rapidly degradable concentrate protein on a number of blood parameters in dairy cattle.

1988 ◽  
Vol 36 (1) ◽  
pp. 51-62
Author(s):  
W.A.G. Veen ◽  
Y.T. Bakker
Keyword(s):  
Amino Acids ◽  
Milk Production ◽  
Crude Protein ◽  
Blood Parameters ◽  
Net Energy ◽  
Maize Silage ◽  
Grass Silage ◽  
Feeding Trials ◽  
Digestible Crude Protein ◽  
Degradable Protein

In 3 feeding trials high-yielding cows and heifers (102, 72 and 92, respectively) were given diets from week 2 of lactation containing grass silage and maize silage and concentrates with slowly or rapidly degradable protein (DP). Diets were given according to the standard or slightly above the standard for digestible crude protein and net energy for milk production. A sample of peripheral blood was taken immediately before the morning feed and at 3-4.5 h after the concentrate was given. Blood urea was higher and blood glucogenic amino acids were lower (P

Studies On Browse Plants in Ghana II. Digestibility, (d) Digestibility Of Grewia Carpinifolia From The Accra Plains, Using Local Cattle As Experimental Animals

1966 ◽  
Vol 2 (2) ◽  
pp. 113-117
Author(s):  
G. L. Mabey ◽  
R. Rose Innes
Keyword(s):  
Organic Matter ◽  
Crude Protein ◽  
Dry Matter ◽  
Ether Extract ◽  
Crude Fibre ◽  
Experimental Animals ◽  
Nutritive Values ◽  
Digestible Crude Protein ◽  
Accra Plains

SummaryDigestibility of the palatable indigenous shrub Grewia carpinifolia was investigated. Digestion coefficients (%) were—organic matter 70, dry matter 70, crude protein 78, crude fibre 54, nitrogenfree extract 81, ether extract 13 and ash 52. Calculated nutritive values were—starch equivalent 27.3 and digestible crude protein 5.0, giving a nutritive ratio of about 1 : 5. The material used was moderately young.

scholarly journals Progress towards reduced-crude protein diets for broiler chickens and sustainable chicken-meat production

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sonia Yun Liu ◽  
Shemil P. Macelline ◽  
Peter V. Chrystal ◽  
Peter H. Selle
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Broiler Chickens ◽  
Crude Protein ◽  
Plasma Concentrations ◽  
Essential Amino Acids ◽  
Chicken Meat ◽  
Meat Production ◽  
Accurate Identification ◽  
Reduced Crude Protein

AbstractThe prime purpose of this review is to explore the pathways whereby progress towards reduced-crude protein (CP) diets and sustainable chicken-meat production may be best achieved. Reduced-CP broiler diets have the potential to attenuate environmental pollution from nitrogen and ammonia emissions; moreover, they have the capacity to diminish the global chicken-meat industry’s dependence on soybean meal to tangible extents. The variable impacts of reduced-CP broiler diets on apparent amino acid digestibility coefficients are addressed. The more accurate identification of amino acid requirements for broiler chickens offered reduced-CP diets is essential as this would diminish amino acid imbalances and the deamination of surplus amino acids. Deamination of amino acids increases the synthesis and excretion of uric acid for which there is a requirement for glycine, this emphasises the value of so-called “non-essential” amino acids. Starch digestive dynamics and their possible impact of glucose on pancreatic secretions of insulin are discussed, although the functions of insulin in avian species require clarification. Maize is probably a superior feed grain to wheat as the basis of reduced-CP diets; if so, the identification of the underlying reasons for this difference should be instructive. Moderating increases in starch concentrations and condensing dietary starch:protein ratios in reduced-CP diets may prove to be advantageous as expanding ratios appear to be aligned to inferior broiler performance. Threonine is specifically examined because elevated free threonine plasma concentrations in birds offered reduced-CP diets may be indicative of compromised performance. If progress in these directions can be realised, then the prospects of reduced-CP diets contributing to sustainable chicken-meat production are promising.

scholarly journals PSIV-21 Pellet processing reduces variability of corn soybean meal-based diet digestibility in growing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 175-175
Author(s):  
Élisabeth Chassé ◽  
Frédéric Guay ◽  
Marie-Pierre Létourneau-Montminy
Keyword(s):  
Amino Acids ◽  
Soybean Meal ◽  
Crude Protein ◽  
Dry Matter ◽  
Crossover Design ◽  
Growing Pigs ◽  
Distal Ileum ◽  
Ileal Digestibility ◽  
Pelleted Diet ◽  
The One

Abstract This study was conducted to determine the effect of pelleting on the digestibility of corn-soybean meal-based diet in growing pigs. Two trials with 6 pigs cannulated at the distal ileum were conducted. In each trial, pigs were assigned to each treatment following a crossover design. In each experiment, the same diet, composed of corn and soybean meal with 10% wheat from two different feed mills, was served in pellet or mash form. Pelleting allowed an increase in digestibility in one of the trials. Apparent ileal digestibility (AID) of dry matter (DM), crude protein (CP) and digestible energy (DE) were improved with pelleting by 8, 12 and 9% (P&lt; 0.01). The AID of amino acids (AA) was also improved (P&lt; 0.05). Apparent total tract digestibility (ATTD) was increased by pelleting in DM, CP and DE by 5, 7 and 6% respectively (P&lt; 0.01). The digestibility of the mash diet in experiment 1 was lower than in the pelleted diet in the experiment 1 and both diets in experiment 2 as shown by the interaction Pelleting X Trial which was significant for the AID and ATTD of DM, CP and DE (P&lt; 0.01). Therefore, in experiment 1, pelleting allows to improve the digestibility of diet to the same level as in experiment 2. The AID of CP was higher by 37% in the mash diet from the second experiment compared to the one in the first experiment. Even though the same ingredients were chosen in the two experiments, this shows the variability in digestibility existing between different feed mills and ingredient sources. This difference was not observed in pelleted diets. The results obtained in these two trials show that pelleting can reduce the variability of digestibility and then give a good digestibility of diets even if the ingredients are of different quality or sources.

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