scholarly journals The Metabolizable Energy Value of Some Feed Ingredients for Young Chicks

1976 ◽  
Vol 55 (2) ◽  
pp. 611-618 ◽  
Author(s):  
J.A. Oluyemi ◽  
B.L. Fetuga ◽  
H.N.L. Endeley
Keyword(s):  
Metabolizable Energy ◽  
Feed Ingredients ◽  
Energy Value ◽  
Young Chicks

FACTORS INFLUENCING THE METABOLIZABLE ENERGY VALUE OF RAPESEED MEAL: LEVEL IN DIET, EFFECTS OF STEAM-PELLETING, AGE OF CHICK, LENGTH OF TIME ON DIET, VARIETY OF RAPESEED AND OIL EXTRACTION PROCEDURE

1974 ◽  
Vol 54 (3) ◽  
pp. 465-480 ◽  
Author(s):  
H. S. BAYLEY ◽  
S. J. SLINGER ◽  
J. D. SUMMERS ◽  
G. C. ASHTON
Keyword(s):  
Fibrous Material ◽  
Extraction Procedure ◽  
Rapeseed Meal ◽  
Oil Extraction ◽  
Fat Content ◽  
Metabolizable Energy ◽  
Energy Value ◽  
Factors Influencing ◽  
Diet Variety ◽  
Young Chicks

Three experiments were carried out with young chicks which showed that steam-pelleting and regrinding a sample of rapeseed meal prior to its incorporation into an assay diet increased its metabolizable energy value, possibly due to improved digestion of the fibrous material in the rapeseed meal. Level of inclusion of the rapeseed meal in the assay diet did not influence the contribution of the rapeseed meal to the overall metabolizable energy of the diet. Neither the age of the chick nor the length of time that the chicks had received the rapeseed meal containing assay diets had sufficient influence on determined metabolizable energy value to account for the wide discrepancies found between published reports of the metabolizable energy value of rapeseed meal. Ten samples of rapeseed meal which had been prepared from either B. napus or B. campestris cultivars by the all solvent, the pre-press solvent or the expeller process were examined. All 10 samples were fed to young chicks and 5 of these samples were fed to mature roosters. The metabolizable energy values of the B. napus meals were very similar for both types of birds, but for the B. campestris the values tended to be higher for the roosters. In these experiments, nitrogen-corrected metabolizable energy values of from 1.34 to 2.00 kcal/g were found; half of this variation could be attributed to variation in fat content of the meals.

scholarly journals Methods for predicting the energy value of pet foods

2009 ◽  
Vol 38 (spe) ◽  
pp. 1-14 ◽  
Author(s):  
Carlos Castrillo ◽  
Marta Hervera ◽  
Maria Dolores Baucells
Keyword(s):  
Near Infrared ◽  
Metabolizable Energy ◽  
Apparent Digestibility ◽  
Crude Fibre ◽  
Near Infrared Reflectance ◽  
Energy Value ◽  
Close Relationship ◽  
Accuracy Of Prediction

The energy value of foods as well as energy requirements of dogs and cats is currently expressed in terms of metabolizable energy (ME). The determination of ME content of foods requires experimental animals and is too expensive and time consuming to be used routinely. Consequently, different indirect methods have been proposed in order to estimate as reliably an accurately as possible the ME content of pet food. This work analyses the main approaches proposed to date to estimate the ME content of foods for cats and dogs. The former method proposed by the NRC estimates the ME content of pet foods from proximal chemical analysis using the modified Atwater factors, assuming constant apparent digestibility coefficients for each analytical fraction. Modified Atwater factors systematically underestimate the ME content of low-fibre foods whereas they overestimate those that are high in fibre. Recently, different equations have been proposed for dogs and cats based in the estimation of apparent digestibility of energy by the crude fibre content, which improve the accuracy of prediction. In any case, whatever the method of analysis used, differences in energy digestibility related with food processing and fibre digestibility are unlikely to be accounted for. A simple in vitro enzymatic method has been recently proposed based in the close relationship that exist between energy digestibility and organic matter disappearance after two consecutive enzymatic (pepsin-pancreatin) incubation of food sample. Nutrient composition and energy value of pet foods can be also accurately and simultaneously predicted using near infrared reflectance spectroscopy (NIRS).

scholarly journals Metabolizable Energy Value of Crude Glycerol for Laying Hens

2008 ◽  
Author(s):  
Kristjan Bregendahl ◽  
Peter J. Lammers ◽  
Brian Kerr ◽  
Mark S. Honeyman ◽  
Kenneth J. Stalder ◽  
...  
Keyword(s):  
Crude Glycerol ◽  
Laying Hens ◽  
Metabolizable Energy ◽  
Energy Value

The nutritive value for ruminants of a complete processed diet based on barley straw

1970 ◽  
Vol 74 (2) ◽  
pp. 311-314 ◽  
Author(s):  
F. W. Wainman ◽  
K. L. Blaxter ◽  
J. D. Pullar
Keyword(s):  
Organic Matter ◽  
Research Council ◽  
Nutritive Value ◽  
Agricultural Research ◽  
Nitrogen Retention ◽  
Metabolizable Energy ◽  
Barley Straw ◽  
Energy Value ◽  
Agricultural Research Council

SUMMARYCalorimetric experiments were made with a complete extruded diet for ruminants, ‘Ruminant Diet A’ prepared by Messrs U.K. Compound Feeds Ltd. Twelve determinations of energy and nitrogen retention were made using sheep and it was found that the diet had a metabolizable energy value of 2–32 kcal/g organic matter, and the net availabilities of its metabolizable energy were 42–7 % for fattening and 68–0 % for maintenance. These values agreed well with those predicted from equations published by the Agricultural Research Council. On a dry basis the starch equivalent was 38–3 %.

scholarly journals Stearic Acid Absorption and Its Metabolizable Energy Value Are Minimally Lower than Those of Other Fatty Acids in Healthy Men Fed Mixed Diets

2003 ◽  
Vol 133 (12) ◽  
pp. 4129-4134 ◽  
Author(s):  
David J. Baer ◽  
Joseph T. Judd ◽  
Penny M. Kris-Etherton ◽  
Guixiang Zhao ◽  
Edward A. Emken
Keyword(s):  
Fatty Acids ◽  
Stearic Acid ◽  
Metabolizable Energy ◽  
Healthy Men ◽  
Energy Value ◽  
Acid Absorption

scholarly journals The utilization of chopped and pelleted lucerne (Medicago sativa) by growing lambs

1979 ◽  
Vol 41 (2) ◽  
pp. 297-310 ◽  
Author(s):  
D. J. Thomson ◽  
S. B. Cammell
Keyword(s):  
Medicago Sativa ◽  
Protein Content ◽  
Live Weight ◽  
Initial Energy ◽  
Metabolizable Energy ◽  
Net Energy ◽  
Regression Equations ◽  
Energy Value ◽  
Physical Processing ◽  
Net Energy Value

1. The efficiency of utilization of the dietary energy and nitrogen contained in a dried lucerne (Medicago sativa cv. Chartainvilliers) given either chopped (CL) or ground (1.96 mm screen) and pelleted (PL), was measured in a comparative slaughter experiment. Growing lambs were given equal amounts of digestible energy in the chopped or pelleted form at each at each of the three planes of nutrition for a period of 100 d.2. The initial energy, fat and protein content of both the carcass and the total body of the test lambs was estimated from regression equations between fasted (18 h) live weight and these components, derived from a group of twenty-three comparable lambs. The final energy, fat and protein content of the test lambs was determined directly by chemical analyses.3. The metabolizable energy (ME) content of the diets was derived at each plane of nutrition from measured faecal and urinary losses and estimated methane losses. The depression in ME content with grinding and pelleting the dried lucerne was small (CL 8.69 MJ/kg dry matter (DM), PL 8.42 MJ/kg DM).4. The efficiency of utilization of the ME of the dried lucerne for growth and fattening was higher (P < 0.01) when given in the ground pelleted form (0.533), than in the chopped form (0.284). The net energy value of the PL (3.5 MJ/kg DM) was higher than that of CL (2.2 MJ/kg DM).5. Thus lambs fed on PL grew faster and had a higher caracass weight gain, carcass protein and fat retention than lambs fed on CL. The composition of the carcass was not altered by the physical processing treatment.6. Digestion studies with these same CL and PL diets had shown that grinding and pelleting depressed digestion in the forestomachs and increased digestion in the small intestine compared with the chopped form. The increased efficiency of utilization of the gross energy and ME and the higher net energy value of PL was attributed primarily to a change in the site of digestion within the alimentary tract. Associated with this change was a higher value for absorbed amino acids : absorbed energy and an increased apparent absorption of methionine for lambs fed on PL. The difference in the energy costs of eating and ruminating the CL and PL was small.

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