&lt;b&gt;Effect of protease supplementation on production performance of laying hens

Filho, Javer Alves Vieira; Geraldo, Adriano; Machado, Luiz Carlos; Brito, Jerônimo Ávito Gonçalves de; Bertechini, Antônio Gilberto; Murakami, Elise Saori Floriano

doi:10.4025/actascianimsci.v37i1.22830

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Proteases increase the digestibility of proteins and amino acids, especially when the ingredients have low quality or low bioavailability (Kocher et al, 2002). Thus, besides providing nutritional benefits, the use of enzymes can contribute to the maintenance of the normal balance of the animal's organism, reflecting in better conditions for the performance and egg production (Vieira Filho et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Effects of different proteases on commercial laying hens at peak production

Barbosa

Corrêa

et al. 2020

Revista Brasileira De Zootecnia

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We evaluated the effect of adding proteases in diets of laying hens at peak production on the performance, egg quality, relative weight of digestive organs, and intestinal morphometry. Hy-Line W36 layer hens (390; 28-39 weeks old) were distributed in five treatments, with 13 animals each, with six replicates. The treatments were: control (standard formulation without nutritional reduction or protease inclusion), negative control A -NCA (nutritional reduction according to protease A matrix, without protease), negative control B -NCB (nutritional reduction according to protease B matrix, without protease), NCA + protease A, and NCB + protease B. The experimental period lasted 12 weeks, divided into three cycles of 28 days. Hens subjected to treatments (NCA and NCB) showed a decrease in feed intake. However, the addition of proteases A and B promoted improvement in this trait. The diets NCA and NCB had a negative influence on the production rate of the hens, but the diet supplementation with protease B resulted in significant improvement on egg laying rate. Hens subjected to nutritional reduction presented the worst results regarding mass and conversion by egg mass. However, the addition of enzymes reversed these results. Although the diets did not affect the relative weights of yolk, albumen, eggshell, Haugh unit, and specific gravity of the eggs, a higher eggshell thickness was observed in hens that received NCA, NCB, and NCB + protease B diets. The diets did not influence the relative weights of digestive organs and the small intestine morphometry. Hens fed diets supplemented with A and B have performance recovered in relation to those that received diets with reduced levels of nutrients.

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Section: Discussionmentioning

confidence: 99%

Effects of different proteases on commercial laying hens at peak production

Barbosa

Corrêa

et al. 2020

Revista Brasileira De Zootecnia

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“…Resende et al (2017) also found similar results, since they observed that the inclusion of an enzyme complex (β-glucanases, β-xylanases, cellulases, and phytases) at the dose of 50g/t in diets of Hy-Line Brown hens from 28 to 40 weeks old, provided improved rates for egg production, egg mass, conversion by dozen, and egg mass compared to hens fed diets with low nutritional density. Vieira Filho et al (2015) observed an increase in the laying rate by adding 500 g ton-1 of protease (100 Ug-1) to diets of Isa Brown commercial layers at 44 weeks old with reduced nutritional levels. Similarly, Silva et al (2012) observed a similar effect, reporting that birds fed diets with nutritional reduction and without supplementation of enzymes presented worse rates of feed conversion, confirming the positive effect of the inclusion of enzymes in diets of laying hens.…”

Section: Protease Supplementation In the Diet Of Light Laying Hensmentioning

confidence: 98%

Protease Supplementation in the Diet of Light Laying Hens

Barbosa

Corrêa

et al. 2022

Braz. J. Poult. Sci.

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This work was developed to evaluate the impact of the addition of proteases on the performance characteristics, egg quality, relative weight of digestive organs, and intestinal morphometry of laying hens. 390 Hy Line W36® hens were allocated into five treatments and six replicates with 13 animals. The treatments were: 1) Control (standard formulation), 2) Negative control A -NCA (nutritional reduction according to protease A matrix), 3) Negative control B -NCB (nutritional reduction according to protease B matrix), 4) NCA+protease A (0.250 g/kg of feed) and 5) NCB+protease B (0.125 g/kg of feed). Hens fed the NCA, NCB, and NCA+protease A diets showed reductions in feed intake and egg mass. The addition of protease B provided better results for egg production in both percentage and per dozen as compared to the group fed with the NCA+protease A diets. The hens subjected to diets NCA and NCB showed eggs with a reduced eggshell and thickness percentage. However, supplementation with proteases A and B improved these parameters to values similar to the controls. There was no significant effect of the treatments on the relative weight of the liver, proventricle, gizzard, pancreas, and small intestine. However, the addition of protease A resulted in a decreased value for the relative weight of the large intestine. The jejunum and ileum crypt depths were, respectively, smaller in hens fed the control diet in relation to the NCB diet and the NCA and NCB diets. As it can be concluded, Protease B supplementation provided the best performance results.

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“…На даному етапі деталізація технології вирощування здійснюється на високому рівні з врахуванням факторів, яким раніше вчені і практики не приділяли уваги. Наприклад, мікроструктурні зміни в кишечнику, зокрема, в слизових оболонках від яких залежить асиміляція нутрієнтів, стан і процеси які відбуваються у кишечнику визначають здоров'я птиці та ефективність використання поживних і біолого активних речовинах, що в свою чергу, пов'язано з інтенсивністю росту і розвитку, конверсією корму та іншими важливими господарськими показниками в птахівництві (Grozina, 2014;Filho et al, 2015;Dong et al, 2017). Відомо, що у птахівництві біля 70% собівартості продукції припадає на вартість кормів.…”

Section: вступunclassified

Age dynamics of growth and development of chichens depending on protein metabolism

Kyryliv

2018

SMLNUVMBA

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In order to carry out the planned research, an experiment was carried out on repair young animals of the laying chickens of the «Hayseks Brown» cross from the one day-old age. For this purpose, in the conditions of the farm «Berkut» of the Drohobych district of the Lviv region, an industrial herd of hens in the amount of 10 thousand heads was formed. Poultry was kept in cages with free access to food and water. The temperature and light modes corresponded to the recommended standards and the content met the requirements of the technology. All poultry received a complete food, balanced for all nutrients and biological active substances. We have studied the dynamics of growth and development of chicken egg production of line cross «Hayseks brown» from day age to the age of peak performance. During the experiment, the study of the intensity of metabolic processes in the body of 6, 35, 90, 120, and 150 day-olds, i.e., in critical periods when there is intense growth of feathers and juvenile molten (30–60 days), the beginning of the oviposition (120 days) and the beginning of an intensive oviposition (150 days). In these age periods, the level of soluble proteins, amine nitrogen, and the activity of alanine and aspartate aminotransferases were determined in liver tissues, cuticles of the muscular stomach, gastrointestinal mucosa, gastrointestinal mucosa, duodenum and pancreas. During the growth and development of chickens, there are critical periods associated with intense growth of feathers (21–35 days), juvenile strain (70–84 days) and the beginning of oviposition (119–126 days). The highest protein content was found in liver and pancreatic tissues (11.08–13.8 mg/g), lower (by 40%) in the tissue of mucous membranes of the glandular stomach and duodenum and 4–5 times lower content in the tissue, the cuticles of the muscular stomach of the chicken in all the periods of growth we were studied. The age dynamics of changes in the activity of AlAT and AsAT was uneven in the tissues according to the study. Reduced AlAT activity at the 30-day age, similar to protein concentration, which is characteristic of liver tissue, 12-gullet mucosa and pancreatic of chicken. The results of biochemical studies are related to changes in the physiological state and magnitude of gains. During the growth of repair young poultry, in the critical periods of growth and development, it is necessary to deliberately affect the processes of protein metabolism by enhancing the processes of digestion and assimilation of nutrients and biologically active substances of fodder and the sufficient introduction of free amino acids by the use of exogenous enzyme preparations.

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<b>Effect of protease supplementation on production performance of laying hens

Cited by 6 publications

References 9 publications

Effects of different proteases on commercial laying hens at peak production

Effects of different proteases on commercial laying hens at peak production

Protease Supplementation in the Diet of Light Laying Hens

Age dynamics of growth and development of chichens depending on protein metabolism

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