D. Hoehler
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View article: Digestible lysine and threonine requirements of male turkeys from days 8 to 21 and days 29 to 42
Digestible lysine and threonine requirements of male turkeys from days 8 to 21 and days 29 to 42 Open
Two experiments were conducted to determine the digestible lysine (dLys) and digestible threonine (dThr) requirements of Nicholas White male turkeys from d 8 to 21 (experiment 1) and d 29 to 42 (experiment 2). In experiment 1, the reduced-…
View article: Standardized ileal amino acid digestibility in wheat distillers dried grains with solubles for broilers
Standardized ileal amino acid digestibility in wheat distillers dried grains with solubles for broilers Open
A study was conducted to estimate the ileal digestibility of amino acids (AA) in 5 different samples of wheat distillers dried grains with solubles (DDGS) fed to broilers. Two hundred sixteen male Ross broiler chicks were fed a commercial …
View article: Comparison of Various Methods for Endogenous Ileal Amino Acid Flow Determination in Broiler Chickens
Comparison of Various Methods for Endogenous Ileal Amino Acid Flow Determination in Broiler Chickens Open
The purpose of this study was to compare estimates of ileal endogenous amino acid (IEAA) losses determined in broiler chicks with a nitrogen-free diet (NFD), diets containing highly digestible proteins as intact casein or enzymatically hyd…
View article: Ideal Ratios of Isoleucine, Methionine, Methionine Plus Cystine, Threonine, Tryptophan, and Valine Relative to Lysine for White Leghorn-Type Laying Hens of Twenty-Eight to Thirty-Four Weeks of Age
Ideal Ratios of Isoleucine, Methionine, Methionine Plus Cystine, Threonine, Tryptophan, and Valine Relative to Lysine for White Leghorn-Type Laying Hens of Twenty-Eight to Thirty-Four Weeks of Age Open
Seven separate experiments were conducted with Hy-Line W-36 hens to determine the ideal ratio of Arg, Ile, Met, Met+Cys, Thr, Trp, and Val relative to Lys for maximal egg mass. The experiments were conducted simultaneously and were each de…
View article: Effect of Amino Acid Formulation and Amino Acid Supplementation on Performance and Nitrogen Excretion in Turkey Toms
Effect of Amino Acid Formulation and Amino Acid Supplementation on Performance and Nitrogen Excretion in Turkey Toms Open
A 2 x 2 factorial experiment was conducted to determine whether diets formulated with 2 (Lys and Met) or 3 (Lys, Met, and Thr) supplemental AA to 100 or 110% of NRC (1994) amino acid (AA) recommendations would affect performance and N excr…
View article: Ideal Amino Acid Profile for 28-to-34-Week-Old Laying Hens
Ideal Amino Acid Profile for 28-to-34-Week-Old Laying Hens Open
The ideal amino acid (AA) profile employs the concept that, whereas absolute AA requirements change due to genetic or environmental factors, the ratios among them are only slightly affected. Thus, once the ideal AA profile has been determi…
View article: Effect of Different Dietary Methionine Sources on Intestinal Microbial Populations in Broiler Chickens
Effect of Different Dietary Methionine Sources on Intestinal Microbial Populations in Broiler Chickens Open
Two experiments were conducted to study the effect of various levels of DL-Met or 2-hydroxy-4-methylthiobutanoic acid (MHA-FA) on Clostridium perfringens and other intestinal bacteria in broiler chickens. In each experiment, 2 cages of 6 b…
View article: The Effect of Corticosterone-Induced Stress on Amino Acid Digestibility in Ross Broilers
The Effect of Corticosterone-Induced Stress on Amino Acid Digestibility in Ross Broilers Open
Two experiments (Exp.) were conducted to establish amino acid (AA) digestibility coefficients (DC) for broilers given corticosterone (CS)-induced stress using the apparent ileal digestibility assay. For Exp. 1, 192 Ross x Ross 708 male bro…
View article: No Evidence for Different Dose Responses of Commercial Methionine Sources in Broilers
No Evidence for Different Dose Responses of Commercial Methionine Sources in Broilers Open
Recently, Vazquez-Anon et al. (2006) published a paper in Poultry Science suggesting evidence for DL-2-hydroxy4-(methylthio) butanoic acid (DL-HMTBA) and DL-Met (DL-M) having different dose responses in growing broilers. The authors conclu…
View article: Dietary glycine concentration affects intestinal Clostridium perfringens and lactobacilli populations in broiler chickens1
Dietary glycine concentration affects intestinal Clostridium perfringens and lactobacilli populations in broiler chickens1 Open
Previous studies have reported that intestinal populations of Clostridium perfringens, the causative agent of necrotic enteritis (NE), are correlated with diets high in glycine. To establish a direct causative link, 3 trials were conducted…
View article: Relative Effectiveness of Methionine Sources in Diets for Broiler Chickens
Relative Effectiveness of Methionine Sources in Diets for Broiler Chickens Open
There is an ongoing discussion regarding the relative effectiveness of the hydroxy analog of methionine (liquid MHA-FA) relative to DL-methionine (DLM). Five experiments were carried out under local conditions in 4 different countries to f…
View article: Broiler responsiveness (Ross x 708) to diets varying in amino acid density
Broiler responsiveness (Ross x 708) to diets varying in amino acid density Open
Sex-separate male and female broilers (2,592 broilers; Ross x 708) were placed in 144 floor pens (12 replications per treatment) and fed diets containing high (H) and moderate (M) amino acid density from 1 to 55 d of age. Diets were formul…
View article: Impact of Methionine Sources on Performance in Turkeys
Impact of Methionine Sources on Performance in Turkeys Open
Data are scarce for relative effectiveness of the liquid hydroxy analogue of Met (MHA-FA) relative to DL-Met (DLM) in turkeys. In the current paper, 2 experiments are presented in order to determine the relative effectiveness of liquid MHA…
View article: Dietary tryptophan need of broiler males from forty-two to fifty-six days of age
Dietary tryptophan need of broiler males from forty-two to fifty-six days of age Open
Tryptophan requirements of broiler males from 42 to 56 d of age were studied. Ross x Ross 308 chicks were placed in an open-sided house, and provided common starter and grower diets from 0 to 42 d of age. Subsequently, a corn, soybean meal…
View article: Threonine needs of broiler chickens with different growth rates
Threonine needs of broiler chickens with different growth rates Open
The Thr needs in 3 commercial broiler strains (A, multipurpose; B, high yield; C, high yield) known to differ in terms of feed intake, growth rate, and breast yield were evaluated. Birds were randomized across 96 floor pens (12 birds/pen),…
View article: Valine Needs of Male Broilers from 42 to 56 Days of Age
Valine Needs of Male Broilers from 42 to 56 Days of Age Open
An experiment was conducted using Ross x Ross 308 males to estimate the proportion of dietary valine needed to optimize performance in broilers from 42 to 56 d of age. All birds received common feeds from 0 to 42 d, and then experimental d…
View article: Dietary Amino Acid and Sodium Bicarbonate Responses in Broilers Reared in Hot Environmental Temperatures
Dietary Amino Acid and Sodium Bicarbonate Responses in Broilers Reared in Hot Environmental Temperatures Open
Better environmentally controlled broiler houses have resulted in many integrated broiler operations using the same dietary feed formulations in winter and summer months due to only minor differences in environmental temperature in the bro…
View article: Lysine needs of summer-reared male broilers from six to eight weeks of age
Lysine needs of summer-reared male broilers from six to eight weeks of age Open
Experimentation was conducted to estimate dietary lysine needed to optimize production of summer-reared broilers between 42 to 56 d of age. Male Ross x Ross 308 chicks were placed in floor pens of an open-sided house and provided common fe…
View article: Arginine need of heavy broiler males: applying the ideal protein concept
Arginine need of heavy broiler males: applying the ideal protein concept Open
An experiment was conducted to determine arginine need of male broilers between the ages of 42 to 56 d, in conjunction with dietary protein approaching a previously advocated ideal amino acid pattern. Ross x Ross 308 chicks were reared in …
View article: Lysine need of heavy broiler males applying the ideal protein concept
Lysine need of heavy broiler males applying the ideal protein concept Open
An experiment was conducted to determine arginine need of male broilers between the ages of 42 to 56 d, in conjunction with dietary protein approaching a previously advocated ideal amino acid pattern. Ross x Ross 308 chicks were reared in …
View article: Impact of graded levels of dietary lysine on performance in turkey toms 5 to 8 and 13 to 16 weeks of age
Impact of graded levels of dietary lysine on performance in turkey toms 5 to 8 and 13 to 16 weeks of age Open
In two experiments the effect of graded levels of dietary lysine on weight gain and feed conversion in male turkeys as well as on profitability were investigated. The experimental diets covered lysine levels from 1.19% to1.64% and 0.80% to…
View article: Relative effectiveness of methionine hydroxy analog compared to DL-methionine in broiler chickens
Relative effectiveness of methionine hydroxy analog compared to DL-methionine in broiler chickens Open
Two broiler experiments were conducted to assess the relative bioefficacy of liquid DL-Met hydroxy analog-free acid (MHA-FA) and DL-Met (DLM). Exponential regression analysis was used to determine biological efficacy based on body weight, …
View article: Influence of Vitamins E and C on the Toxic Effects of Ochratoxin A and T-2 Toxin in Chicks
Influence of Vitamins E and C on the Toxic Effects of Ochratoxin A and T-2 Toxin in Chicks Open
The objective of this study was to determine whether two antioxidant vitamins, vitamins E and C, were able to counteract the production of lipid peroxides and the corresponding toxic signs of two important but diverse mycotoxins, T-2 toxin…
View article: Free Radical Generation as Induced by Ochratoxin A and Its Analogs in Bacteria (Bacillus brevis)
Free Radical Generation as Induced by Ochratoxin A and Its Analogs in Bacteria (Bacillus brevis) Open
Lipid peroxidation is considered as one of the manifestations of cellular damage in the toxicity of ochratoxin A (OA). OA; its three natural analogs, OB, OC, and Oalpha; and four synthetic analogs, d-OA, the ethylamide of OA (OE-OA), O-met…