Effect of dietary energy, protein, and a versatile enzyme on hen performance, egg solids, egg composition, and egg quality of Hy-Line W-36 hens during second cycle, phase two

Gunawardana, P.; Roland, D. A.; Bryant, M. M.

doi:10.3382/japr.2008-00047

Cited by 20 publications

(10 citation statements)

References 26 publications

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“…In contrast, the Haugh unit was equally improved with supplementation of Thr or Val, meanwhile quails fed diet supplemented with Thr+Val+Trp mixture reported a better Haugh unit compared to other diets with supplemental amino acids as well as a positive control diet. These results are in disagreement with those of Gunawardana et al (2009) and Alagawany et al (2011) who reported that there was no response of the Haugh unit to dietary protein level in laying hens. Further, Novak et al (2004) found no difference in the Haugh unit when increasing dietary CP levels were fed to laying hens from 20 to 43 weeks of age.…”

Section: Egg Qualitycontrasting

confidence: 79%

Effect of Low-Protein Diets with Crystalline Amino Acid Supplementation on Egg Production, Blood Parameters and Nitrogen Balance in Laying Japanese Quails

Alagawany

El‐Hack

Laudadio

et al. 2014

Avian Biology Research

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A total of 120 Japanese quails were randomly distributed into six dietary groups to evaluate the effect of lowcrude protein (CP) diet supplemented with crystalline amino acids on productive and reproductive performance, blood parameters and nitrogen (N) balance. Treatments consisted of six different diets: a control diet (20% CP), a low-CP (16%) diet supplemented with threonine (Thr), valine (Val) and tryptophan (Trp), three low-CP diets supplemented with individual Thr, Val or Trp, and a low-CP diet supplemented with all aforementioned amino acids. None of the growth traits examined were influenced either by dietary treatments or by egg production (P > 0.05). The highest fertility percentages (88.2%) were observed in quails fed the low-CP diet without crystalline amino acids supplementation followed by low-CP diet supplemented with Val (86.2%), whereas the highest hatchability (from fertile eggs) percentage was observed in quails fed low-CP diet plus Trp. Egg shell percentages from quails fed the control diet were higher (P < 0.05) compared to other dietary treatments during the whole feeding period. Yolk percentage was decreased (P < 0.01) with the low-CP diet supplemented with amino acids. Blood protein and ammonia levels were decreased (P < 0.05) by reducing the dietary CP level or by supplementing amino acids to the low-CP diet. Reducing the CP level in the diet with amino acids supplementation in laying quails decreased the daily N excretion (P < 0.05). It is concluded that reducing the CP level in a diet supplemented with crystalline amino acids supports reproductive performance in quails, and is a valuable strategy for decreasing feeding cost and mitigating ammonia emission.

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Section: Egg Qualitycontrasting

confidence: 79%

Effect of Low-Protein Diets with Crystalline Amino Acid Supplementation on Egg Production, Blood Parameters and Nitrogen Balance in Laying Japanese Quails

Alagawany

El‐Hack

Laudadio

et al. 2014

Avian Biology Research

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“…However, when the diets were reformulated and the protein was reduced by 4.0 g/kg, the values were similar to those obtained by Gunawardana et al (2009) when studying the effects on the performance of layer chickens during the second laying cycle fed different levels of energy, protein and enzymes; they did not obtain differences for the total solids present in the yolk. However, protein, when evaluated individually, presented a significant effect (P<0.05), and achieved better results when the bird received a diet with a lower protein level.…”

Section: Discussionsupporting

confidence: 59%

Nutritional reduction of protein and usage of enzyme in the diet of light layers

et al. 2012

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-The objective of this study was to evaluate the reduction of protein, the formulation of diets and supplementation of an enzyme complex for laying hens. The layers were distributed in a completely randomized 2 × 2 × 2 factorial arrangement, with two levels of crude protein reduction (0.0 and 4.0 g/kg), two kinds of diet formulation (without and with reformulation, considering 75 kcal of metabolizable energy) and two enzyme supplementations (without and with enzyme complex supplementation), totalizing 8 treatments of 8 layers each, with 7 replications, in a total of 448 laying hens at 30 weeks of age. After data analysis, it was found that the enzyme complex supplementation in the diet of layers improves performance, promotes a similar egg quality and improves the bone and intestinal health of the layers.

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“…Therefore, since the 80th the common practice in animal nutrition has been to complement animal diets with enzymes cocktails (Bedford and Partrige, 2011). This practice has shown significant beneficial zootechnic effects, such as improving animal performance and reducing excreta by a better nutrient absorption, resulting in a positive environmental impact of animal farming (Fuente et al, 1995; Gunawardana et al, 2010; Lafond et al, 2011a; Lei et al, 2016). While these beneficial effects are assumed to be due to the assimilation of NPSs, there is yet no direct experimental data, at least in the field of feed nutrition, showing how these NSP substrates are deconstructed and solubilized by these enzymes cocktails.…”

Section: Introductionmentioning

confidence: 99%

Combined in situ Physical and ex-situ Biochemical Approaches to Investigate in vitro Deconstruction of Destarched Wheat Bran by Enzymes Cocktail Used in Animal Nutrition

Deshors

Guais²,

Neugnot‐Roux³

et al. 2019

Front. Bioeng. Biotechnol.

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Wheat bran is a foodstuff containing more than 40% of non-starch polysaccharides (NSPs) that are hardly digestible by monogastric animals. Therefore, cocktails enriched of hydrolytic enzymes (termed NSPases) are commonly provided as feed additives in animal nutrition. However, how these enzymes cocktails contribute to NSPs deconstruction remains largely unknown. This question was addressed by employing an original methodology that makes use of a multi-instrumented bioreactor that allows to dynamically monitor enzymes in action and to extract in-situ physical and ex-situ biochemical data from this monitoring. We report here that the deconstruction of destarched wheat bran by an industrial enzymes cocktail termed Rovabio® was entailed by two concurrent events: a particles fragmentation that caused in <2 h a 70% drop of the suspension viscosity and a solubilization that released <30 % of the wheat bran NSPs. Upon longer exposure, the fragmentation of particles continued at a very slow rate without any further solubilization. Contrary to this cocktail, xylanase C alone caused a moderate 25% drop of viscosity and a very weak fragmentation. However, the amount of xylose and arabinose from solubilized sugars after 6 h treatment with this enzyme was similar to that obtained after 2 h with Rovabio®. Altogether, this multi-scale analysis supported the synergistic action of enzymes mixture to readily solubilize complex polysaccharides, and revealed that in spite of the richness and diversity of hydrolytic enzymes in the cocktail, the deconstruction of NSPs in wheat bran was largely incomplete.

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Effect of dietary energy, protein, and a versatile enzyme on hen performance, egg solids, egg composition, and egg quality of Hy-Line W-36 hens during second cycle, phase two

Cited by 20 publications

References 26 publications

Effect of Low-Protein Diets with Crystalline Amino Acid Supplementation on Egg Production, Blood Parameters and Nitrogen Balance in Laying Japanese Quails

Effect of Low-Protein Diets with Crystalline Amino Acid Supplementation on Egg Production, Blood Parameters and Nitrogen Balance in Laying Japanese Quails

Nutritional reduction of protein and usage of enzyme in the diet of light layers

Combined in situ Physical and ex-situ Biochemical Approaches to Investigate in vitro Deconstruction of Destarched Wheat Bran by Enzymes Cocktail Used in Animal Nutrition

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