Broiler feeding and management in hot climates.

Daghir, N. J.

doi:10.1079/9781845932589.0227

Cited by 47 publications

(55 citation statements)

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“…A solution for the prevention of heat stress includes biological (e.g. genetics, thermal conditioning, nutrition) (Daghir, 2008;Lin et al, 2006) or keeping technology devices (e.g. air conditioning, intensive ventilation, humidification) (Armstrong, 1994;Wolfenson et al, 2001) However, housing methods are expensive and not always adequate.…”

Section: Introductionmentioning

confidence: 99%

Impact of selected antioxidant vitamins (Vitamin A, E and C) and micro minerals (Zn, Se) on the antioxidant status and performance under high environmental temperature in poultry. A review

Horváth

Babinszky

2018

Acta Agriculturae Scandinavica, Section A — Animal Science

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The aim of this review was to discuss the effects of heat stress on antioxidant status and performance in poultry. Based on the recent literature data, the following conclusions can be drawn: (1) Heat stress can cause harmful effects in birds (e.g. increased ROS (Reactive Oxygen Spices) production and lipid peroxidation, decreased vitamin concentrations, changed enzyme activity) and consequently in production parameters (e.g. feed intake, body weight and feed conversion ratio). (2) Diets containing high Vitamin A (9000-15 000 IU/kg diet), E (150-500 mg/ kg diet), C (150-500 mg/kg diet) and Zn (30/60 mg/kg diet) and Se (0.1-1 mg/kg diet) can decrease the amounts of free radicals, support enzyme activity and prevent lipid peroxidation in poultry.(3) Application of antioxidant vitamins and micro minerals in poultry nutrition is more effective in combination than separately. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Impact of selected antioxidant vitamins (Vitamin A, E and C) and micro minerals (Zn, Se) on the antioxidant status and performance under high environmental temperature in poultry. A review

Horváth

Babinszky

2018

Acta Agriculturae Scandinavica, Section A — Animal Science

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“…In the tropic, heat stress (HS) are most important factor that negatively affects animal performance. Heat stress adversely influences feed intake, reproductive and laying performance, economical traits and decrease welfare of laying hens (Daghir 2008 ). High temperature negatively affect feed intake and consequently endocrine system, acid–base imbalance and organs’ functions.…”

Section: Introductionmentioning

confidence: 99%

“…Both environmental temperature and relative humidity interacted to affect HS severity (Attia et al 2006 ; Tumová and Gous 2012 ), and laying hens strain (Franco-Jimenez et al 2007 ). Vitamin C and vitamin E as antioxidant and trimethylglycine (Betaine; Bet) has been suggested to alleviate the adverse effects on HS on laying hens (Daghir 2008 ; Attia et al 2009 , 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Laying performance, digestibility and plasma hormones in laying hens exposed to chronic heat stress as affected by betaine, vitamin C, and/or vitamin E supplementation

et al. 2016

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Heat stress had a negative effect on laying hens’ performance, thus this research was to study the influences of betaine (Bet, 1000 mg/kg betaine), vitamin C (VC, 200 mg/kg ascorbic acid), and vitamin E (VE, 150 mg/kg α-Tocopherol acetate) and their possible combinations on egg production, digestibility of nutrients, plasma hormones and reproductive organs of dual-purpose hens exposed to chronic heat stress. Two hundred and eighty eight hens and thirty-six cocks from 32 to 48 weeks of age were divided into nine treatment groups of four replicates, each containing eight hens and one cock. One group was kept under thermo-natural condition and the eight others were kept under chronic heat stress (CHS). One of these eight was used as a negative control, while the others were supplemented with VC, VE and/or betaine and their possible combinations. Body weights, laying rate, feed intake, and feed conversion ratio in hens reared under CHS rooster without any supplementation during 32 to 48 weeks of impairment (P = 0.0052) were recorded. Hens reared under heat stress and fed a diet supplemented with either Bet, VC, VE or combination of the supplements increased production traits. However, hens supplemented with VC showed the greatest production traits. Plasma glucose, estradiol-17 (E2), progesterone (P4), tri-iodothyronine (T3) and thyroxine (T4) decreased in hens reared under CHS and fed a diet with no supplementation compared to the other treatments (P = 0.001). Liver weights, spleen weights, thyroid gland weights, ovary weights, oviduct weights and oviduct lengths were lowest in hens reared under CHS and fed a diet with no supplementation (P = 0.0480). In conclusion, dual purpose hens reared under CHS and supplemented with VC at 200 mg/kg diet and Bet at 1000 mg/kg enhanced the laying performance and combated CHS.

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“…O aumento da umidade das excretas compromete o consumo, ganho de peso e conversão alimentar em frangos (YASAR & FORBES, 1997). Também pode elevar a incidência de problemas respiratórios e lesões oculares em virtude do crescimento dos níveis de amônia nas instalações (DAGHIR, 1995).…”

Section: Excretasunclassified

Efeitos da inclusão do farelo de sementes de jaqueira Artocarpus heterophyllus Lam.) na ração sobre a produção, pigmentação da gema e umidade fecal em codornas

et al. 2007

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RESUMOUm experimento foi conduzido com o objetivo de avaliar o efeito de níveis crescentes do farelo da semente de jaqueira (Artocarpus heterophyllus Lam.) na ração sobre a produção e pigmentação da gema dos ovos e umidade das excretas em 180 codornas japonesas (Coturnix coturnix japonica). Aos 42 dias de idade, as aves foram distribuídas em delineamento inteiramente casualizado e alimentadas com rações contendo níveis de 0; 2; 4; 6; 8 e 10% do farelo de semente de jaqueira (FSJ). Foram avaliados o consumo de ração, produção de ovos, peso dos ovos, massa de ovos, conversão por massa e por dúzia de ovos, além do peso e da porcentagem de gema, clara, casca, pigmentação da gema dos ovos e umidade das excretas. O aumento do FSJ na ração piorou linearmente (P<0,05) a produção e a conversão alimentar por dúzia de ovos, mas melhorou a pigmentação da gema com a inclusão de até 7,44% de FSJ na ração e elevou a umidade fecal até 4,9% de inclusão do FSJ. A presença do fator antitripsina é uma possível explicação para o pior desempenho das codornas com o aumento do FSJ na ração, portanto, recomenda-se expor as sementes a um tratamento térmico, do contrário o farelo de semente frescas de jaqueira não deve ser incluído na ração de codornas japonesas. Termos para indexação:Alimento alternativo, codornas em postura, qualidade de ovos. ABSTRACTAn experiment was carried out to evaluate the effect of increase levels of jackfruit (Artocarpus heterophyllus Lam.) seeds bran in diet of japanese quails on egg production, yolk pigmentation and dropping humidity . A total of 180 japanese quails (Coturnix coturnix japonica) with 42 days oold were distributed in a completely randomized design and fed diets with differents levels of 0; 2; 4; 6; 8 and 10% of jackfruit seeds bran (JSB). The variables feed intake, egg production, egg weigh, egg mass, feed egg mass conversion and feed egg dozen conversion as well as the yolk weight and yolk percentage, egg white, egg shell and egg yolk pigmentation. The data shown that increasing JSB in the diets reduced the egg production and higher feed egg dozen conversion lineally (P<0,05). Therefore the egg yolk pigmentation improved up to 7.44% of JSB in the diet and the dropping humidity was higher up to 4.9% of JSB.The presence of antitrypsin factor is a possible explanation for lower performance on the japanese quails fed diets with increase of JSB fresh. In order to solve this problem e, it is recommended to expose the seeds to a thermal treatment, otherwise the jackfruit seed fresh should not be included in the diet for japanese quails. INTRODUÇÃOAssim como na criação de frangos de corte e poedeiras comerciais, a rentabilidade da atividade coturnícula para a produção de ovos está vinculada, basicamente, ao preço dos ovos e o custo com a alimentação das aves. Desta forma, a receita líquida com a venda de ovos é substancialmente influenciada pelos preços do milho e do farelo de soja. A diversificação do uso de fontes protéicas e energéticas das rações de codornas pode ser uma alternativa para minimiza...

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Broiler feeding and management in hot climates.

Cited by 47 publications

References 0 publications

Impact of selected antioxidant vitamins (Vitamin A, E and C) and micro minerals (Zn, Se) on the antioxidant status and performance under high environmental temperature in poultry. A review

Impact of selected antioxidant vitamins (Vitamin A, E and C) and micro minerals (Zn, Se) on the antioxidant status and performance under high environmental temperature in poultry. A review

Laying performance, digestibility and plasma hormones in laying hens exposed to chronic heat stress as affected by betaine, vitamin C, and/or vitamin E supplementation

Efeitos da inclusão do farelo de sementes de jaqueira Artocarpus heterophyllus Lam.) na ração sobre a produção, pigmentação da gema e umidade fecal em codornas

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