RESUMO -Objetivou-se, neste experimento, avaliar o efeito de diferentes níveis de proteína bruta (PB) e de energia metabolizável (EM) sobre o desempenho de codornas de postura. Foram utilizadas 672 codornas japonesas (Coturnix coturnix japonica) a partir de 42 dias de idade, durante 168 dias de produção, dividido em seis períodos de 28 dias cada, distribuídas em delineamento inteiramente casualizado, em arranjo fatorial de 4 x 4 (proteína x energia), com seis repetições de sete aves por unidade experimental. Os níveis avaliados foram: 16, 18, 20 e 22% de proteína bruta e 2.585, 2.685, 2.785 e 2.885 kcal de energia metabolizável/kg de ração. Não houve efeito significativo dos tratamentos sobre a ingestão de energia e a produção de ovos. Entretanto, o aumento do nível de energia da ração promoveu redução linear no consumo de ração, na ingestão diária de proteína bruta, no peso do ovo e na massa de ovos, enquanto o de proteína proporcionou aumento linear na ingestão diária de proteína bruta, na massa de ovos, na conversão alimentar e no ganho de peso corporal e efeito quadrático sobre o peso do ovo, sendo 21,16% o nível de proteína bruta estimado para a obtenção do máximo peso do ovo. Pode-se concluir que as codornas japonesas têm o consumo regulado em função do nível de energia da ração. Para se obter maior produção de ovos e melhor conversão alimentar, a ração de postura deve conter 18% de proteína bruta e 2.585 kcal de EM/kg. Entretanto, se o objetivo for a obtenção de ovos com peso mais elevado, o nível de proteína bruta da ração deve aumentar para 21,16%.Palavras-chave: codornas japonesas, consumo de ração, energia, peso do ovo, proteína Dietary Crude Protein and Metabolizable Energy Levels on Laying Quails PerformanceABSTRACT -This work was developed to evaluate the effect of different levels of crude protein (CP) and metabolizable energy (ME) on the performance of laying quails. Six hundred and seventy tywo Japanese quails (Coturnix coturnix japonica) from 42 days to 168 days of age were divided in six periods of 28 days each. The birds were assigned to a completely randomized design, with the treatments in a factorial arrangement of 4 x 4 (protein x energy), with six replication of seven birds per experimental unit. The levels evaluated were: 16, 18, 20 and 22% of crude protein and 2,585; 2,685; 2,785 and 2,885 kcal of metabolizable energy/kg of diet. The treatments did not showed significantly effect on the energy intake and egg production. However, the increase in energy level caused a linear reduction in feed intake, protein intake, egg weight and eggs mass; while, the increase in protein level caused a linear increase in daily intake of crude protein, eggs mass, feed conversion and variation in body weight of the birds and a quadratic effect on the egg weight. The estimated level of crude protein in the diet to obtain the maximum egg weight was 21,16%. It was concluded that Japanese quails regulate feed intake according to the energy level of the diet. In order to obtain higher egg production and better...
1. Apparent metabolisable energy corrected to zero-nitrogen retention (AMEn) was measured using the European reference procedure in 9 European laboratories. Seven pelleted diets were evaluated. AMEn was measured with adult cockerels and young birds. 2. Between-laboratory standard deviations were for dry matter (DM) 12.5 g/kg, gross energy 0.085 MJ/kg DM, Kjeldahl nitrogen 0.768 g/kg DM, AMEn (adults) 0.256 MJ/kg DM, and AMEn (young) 0.337 MJ/kg DM. Corresponding coefficients of variation between laboratories were 1.42, 0.45, 2.15, 1.88 and 2.60% respectively. 3. AMEn values of experimental diets were always significantly lower when measured with young birds. This effect was more pronounced when diets contained added fat. 4. Tallow or soyabean oil were incorporated into two basal diets at 40 g/kg inclusion rate. No significant differences were observed between AMEn values of either diet with adults or young birds, suggesting that AMEn energy values of these fats are indistinguishable at this inclusion rate. 5. Similar AMEn values were obtained in young birds by estimating nitrogen accretion, either by the difference between intake and excreta nitrogen or by measuring body weight gain. Determined AMEn values were very similar to those predicted using three different regression equations.
seis tratamentos e oito repetições de 15 aves cada. Os tratamentos consistiram em seis rações isonutrientes com inclusão de 0, 5, 10, 15, 20 e 25% de ração com farelo de castanha de caju. O consumo de ração não foi influenciado pelos tratamentos. Entretanto, o aumento do FCC na ração promoveu aumento linear no ganho de peso, em todas as fases, e melhora linear na conversão alimentar, na fase inicial e no período total. Em relação ao controle, observou-se que, na fase inicial, as aves alimentadas com a ração com 25% de FCC apresentaram maior ganho de peso e melhor conversão alimentar. Na fase final e no período total de criação, a conversão melhorou a partir de 10% de inclusão, enquanto o ganho de peso foi maior a partir de 15% de inclusão. O rendimento de carcaça e a gordura abdominal não foram influenciados; os índices econômicos melhoraram com a inclusão do FCC. O FCC pode ser incluído nas rações de frangos de corte em proporções de até 25%.Termos para indexação: consumo de ração, conversão alimentar, ganho de peso. Cashew nut meal in broiler dietsAbstract -The objective of this work was to evaluate the performance of broilers fed diets containing cashew nut meal (CNM). The experiment followed a completely randomized design with six treatments and eight replicates of 15 broilers each. Treatments consisted of six isonutrient diets containing 0, 5, 10, 15, 20 and 25% of CNM. Feed intake was not affected by CNM levels. However, increasing CNM in diets promoted a linear increase in weight gain, in all phases, and a linear improvement in broiler feed conversion for the initial and total period. Compared to control diet, broilers fed diets with 25% of CNM inclusion, in the initial phase, showed the highest weight gain and the best feed conversion. During the final phase and all the feeding period, feed conversion was improved in broilers fed up to 10% CNM inclusion; and weight gain increased when inclusion of CNM was 15% or higher. Carcass yield and abdominal fat were not affected. Inclusion of CNM in diet improved economic efficiency of broiler production. CNM can be included up to 25% in broiler diets.
(Coturnix coturnix coturnix), machos e fêmeas no período de 1 a 42 dias de idade, distribuídas em delineamento inteiramente casualizado, com os tratamentos em arranjo fatorial 4 x 4 (proteína x energia), com três repetições de 16 aves. Não houve efeito significativo da interação proteína × energia nem dos níveis de PB sobre o consumo de ração, o ganho de peso e a conversão alimentar das aves e a viabilidade econômica das rações. Entretanto, o aumento do nível de energia da ração provocou redução linear no consumo de ração, aumentou o ganho de peso e melhorou a conversão alimentar das aves. O consumo de ração por codornas de corte depende do nível de energia da ração. O melhor desempenho destas aves foi obtido com 20% de PB e 2.865 kcal de EM/kg. Palavras-chave: Coturnix coturnix coturnix, codornas européias, consumo de ração, conversão alimentar, produção de carne Dietary crude protein and metabolizable energy levels for meat quailsABSTRACT -The effect of different CP (20, 22, 24, and 26% of CP) and ME (2,565, 2,715, 2,865, and 3,015 kcal of ME/kg. ) levels on the performance of meat quails was evaluated. Seven hundred and sixty-eight European quails (Coturnix coturnix coturnix) of both sexes from 1 to 42 days of age were assigned to a completely randomized design with 4 x 4 factorial arrangement (protein x energy) and grouped into three clusters with 16 birds each. No significant interaction among proteinenergy and protein levels on feed intake, weight gain, feed:gain ratio and viability was observed. However, increasing the dietary energy level resulted in linear reduction of feed intake and greater weight gain and feed:gain ratio. Feed intake of meat quails depends on the dietary energy level. Diet containing 20% CP and 2,865 kcal ME/kg account for better meat quail performance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.