A Study of the Comparative Efficiency of Various Proteins in Poultry Feeding

Ackerson, C. W.; Blish, M. J.; Mussehl, F. E.

doi:10.3382/ps.0090112

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…body weight and mg. daily N excretion on the low-N diet with 84 low-N trials. This agrees well with the correlation of the same variables of 0.265 reported by Ackerson, Blish, and Mussehl (1930). However, partial correlations obtained for body weight and body N excretion daily, independent of the dry matter excreted daily or of the daily feed intake, were -0.193, and -0.075, respectively.…”

Section: Methods Of Protein Evaluationsupporting

confidence: 90%

“…Accordingly, body N has been expressed as a proportion or a percentage of the dry matter excreted. This procedure would not be possible if N were determined daily on the fresh excrement (Ackerson et al, 1930) but the method of drying and sampling of the excrement for the entire collection period as used in this laboratory permits the estimation of body N by means of the dry matter excreted.…”

Section: Methods Of Protein Evaluationmentioning

confidence: 99%

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Percentage Utilization and Supplementary Relationships of Certain Protein Concentrates in Semi-Purified Basal Diets for Growing Chickens

VanLandingham¹,

Clark²,

Schneider³

1942

Poultry Science

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Section: Methods Of Protein Evaluationsupporting

confidence: 90%

Section: Methods Of Protein Evaluationmentioning

confidence: 99%

Percentage Utilization and Supplementary Relationships of Certain Protein Concentrates in Semi-Purified Basal Diets for Growing Chickens

VanLandingham¹,

Clark²,

Schneider³

1942

Poultry Science

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“…The progressive increase in feed quantity, reduced negative nitrogen balance, and the precision method produced lower EEL values than the CAM (Sibbald, 1975(Sibbald, , 1981. However, the standard deviation and coef cient of determination (r 2 ) were low (0·32) for both procedures, but the CAM was more favourable in this respect than precision feeding (Ackerson et al, 1929). There were substantial differences between the intercepts and regression coefcients for the two methods, which may in uence the TME values since, for a given TME value, AME depends on EEL per unit of feed intake (Sibbald, 1975).…”

Section: Discussionmentioning

confidence: 79%

Influence of level of feed input and procedure on metabolisable energy and endogenous energy loss (EEL) with adult cockerels

Yaghobfar¹,

Boldaji²

2002

British Poultry Science

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1. Two experiments were performed to study the relationship between apparent metabolisable energy (AME) and true metabolisable energy (TME) values at different feed intakes. Rhode Island Red (RIR) adult cockerels were used in two bioassays, under standard conditions. 2. In the first experiment (precision feeding) the birds were not fed for 24 h and then various quantities of maize were fed. There were 6 replicates per treatment. Droppings voided during the 48 h of the experimental period were collected and assayed for gross energy and nitrogen. 3. In the second experiment, each bird was given a 3-d adaptation period, fasted for 24 h and then given maize as an admixture (conventional addition method: CAM) to the same rations as those used in the first experiment. During the 3 d of the experimental period, droppings were collected and frozen for chemical analysis. 4. The results showed that mean metabolisable energy (ME) values obtained by the precision-feeding procedure were higher than those obtained by CAM. The endogenous energy loss (EEL) (FEm + UEe) determined by precision feeding was lower than that given by CAM. 5. It was concluded that the method of feeding does not influence ME of maize at different feed inputs. However, differences among intercepts of the regression between ME and feed input suggest that EEL varies at different maize inputs. 6. The optimum maize quantity was approximately 35 to 40 g for adult RIR cockerels by both procedures.

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“…Brody (1945) states that endogenous and total nitrogen excretions (mg/day) of all species are equal to 146 M-72 and 283 M-735 , respectively, where M is the body weight (kg). However, Ackerson et al (1929) found a very low correlation (r = .265 at 78 DF) between endogenous nitrogen and the body weights of Rhode Island Red hens.…”

Section: The Regression Coefficients Contained Inmentioning

confidence: 78%

Metabolic Plus Endogenous Energy and Nitrogen Losses of Adult Cockerels: The Correction Used in the Bioassay for True Metabolizable Energy

Sibbald

1981

Poultry Science

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Three experiments were made with adult White Leghorn cockerels to measure the effect of indigestible organic matter on the metabolic fecal and endogenous urinary energy and nitrogen losses. When a cellulose:carboxymethyl cellulose mixture was placed in the crops of fasted birds the energy excreted during the subsequent 24 and 48 hr was greater than, but proportional to, the energy input. The linear regression coefficients were not different (P>.05) from unity, indicating that the metabolic and endogenous energy output neither increased nor decreased when cellulose was administered. This finding was confirmed when graded levels of sawdust were fed in place of the cellulose. It is concluded that the use of a fasted bird to measure the metabolic and endogenous energy loss, as in the bioassay for true metabolizable energy, is valid and the changes induced by the nature or quantity of dietary fiber are insignificant.Nitrogen excretion was not affected by the feeding of cellulose or sawdust. Excretion increased with the duration of starvation but the difference diminished as the birds aged and became heavier. Nitrogen losses varied greatly among birds but tended to be characteristic of a bird within an experiment.(

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A Study of the Comparative Efficiency of Various Proteins in Poultry Feeding

Cited by 8 publications

References 12 publications

Percentage Utilization and Supplementary Relationships of Certain Protein Concentrates in Semi-Purified Basal Diets for Growing Chickens

Percentage Utilization and Supplementary Relationships of Certain Protein Concentrates in Semi-Purified Basal Diets for Growing Chickens

Influence of level of feed input and procedure on metabolisable energy and endogenous energy loss (EEL) with adult cockerels

Metabolic Plus Endogenous Energy and Nitrogen Losses of Adult Cockerels: The Correction Used in the Bioassay for True Metabolizable Energy

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