Equações De Predição Da Energia Digestível De Ingredientes Protéicos De Origem Vegetal Utilizados Em Rações Para Tilápias

Oliveira, Francisco Loiola de; Siqueira, Jefferson Costa de; Santos, J. da C. dos; Pereira, Wellyngton Gomes

doi:10.18764/2178-2229.v21.n.especial.p.1-9

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The higher protein efficiency achieved with the reduction of CP occurred because the control diet (32% CP) consisted of amino acids at levels exceeding what is required by the fish, in comparison to the diets with reduced CP and amino acid supplementation (BOMFIM et al, 2008). These results show that fish, consistent with that observed in birds and swine, do not have protein requirements, but need an adequate balance of amino acids in order to meet maintenance and production needs (OLIVEIRA et al, 2014;RAMPE et al, 2014).…”

Section: Resultssupporting

confidence: 62%

Crude protein reduction with amino acid supplementation in tambaqui fingerling diets

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Bomfim

Siqueira

et al. 2015

SCA

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The aim of this study was to evaluate the effect that reduced crude protein (CP) diets with amino acid supplementation, based on the ideal protein concept, have on the performance of tambaqui fingerlings. In total, 750 fingerlings with an initial weight of 0.44 ± 0.14 g, were used in a completely randomized design, with six treatments, five replications, and 25 fish per experimental unit. Treatments consisted of six isocaloric, isocalcic, isophosphoric, and isolysinic diets containing 32.0, 30.5, 29.0, 27.5, 26.0, and 24.5% CP. Performance parameters, carcass yield, body composition (body humidity, protein, and fat content), and nitrogen retention efficiency (NRE) of the fish were evaluated. When the CP content was reduced to 27.5%, there was an improvement in weight gain, specific growth rate, feed conversion, and protein efficiency rate. Feed intake was higher in fish fed diets containing 26% CP, followed by those fed diets containing 29 and 27.5% CP; diets containing other levels of CP did not differ among themselves. CP intake was reduced by the use of diets containing 24% CP, and the carcass yield was not influenced by the treatments. Reduced CP had no influence on body composition. NRE was higher in response to diets containing 26.0 and 24.5% CP. Reducing dietary CP content, from 32.0 to 24.5%, based on the ideal protein concept, is possible for tambaqui fingerlings, and a decrease of up to 24.5% enhances the fish performance. Key words: Amino acids, Colossoma macropomum, performance, protein nutrition ResumoAvaliou-se os efeitos da redução da proteína bruta (PB) com suplementação de aminoácidos, com base no conceito de proteína ideal, em rações no desempenho de alevinos de tambaqui. Utilizou-se 750 alevinos com peso inicial de 0,44 ± 0,14 g, em delineamento inteiramente casualizado, com 6 tratamentos, 5 repetições e 25 peixes por unidade experimental. Os tratamentos consistiram em 6 rações isoenergéticas, isocálcicas, isofosfóricas e isolisínicas com 32,0; 30,5; 29,0; 27,5; 26,0; 24,5% de PB. Avaliaram-se as variáveis de desempenho, composição corporal (umidade, proteína e gordura corporais) e eficiência de retenção de nitrogênio (ERN). Com a redução da PB a partir de 27,5%, observou-se melhora no ganho de peso, na taxa de crescimento específico, na conversão alimentar e na taxa de eficiência proteica. O consumo de ração foi superior nos peixes alimentados com dietas contendo 26% de PB, seguidos de 29,0 e 27,5% de PB, os demais níveis não variaram entre si. O consumo de proteina bruta reduziu com a utilização da dieta com 24% de PB e o rendimento de carcaça não foi influenciado pelos tratamentos. A redução da PB não influenciou a composição corporal dos peixes. A ERN foi superior nos níveis de 26,0 a 24,5% de PB. É possível reduzir de 32,0 para 24,5% o teor de PB em rações, com base no conceito de proteina ideal, para alevinos de tambaqui, e a redução do teor de PB até o nível de 24,5% potencializa o desempenho dos peixes.

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Section: Resultssupporting

confidence: 62%

Crude protein reduction with amino acid supplementation in tambaqui fingerling diets

Lima

Bomfim

Siqueira

et al. 2015

SCA

Self Cite

View full text Add to dashboard Cite

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“…The objective was to visualise the general behaviour of the data, determining position and dispersion measures, such as the mean, median, maximum (max) and minimum (min) values, standard deviation and coefficient of variation (Silva et al, 2012). Then the Shapiro Wilk test was applied to verify the normality of the data, the F test to compare two variances and the means test to compare paired data (Torman et al, 2012, Oliveira et al, 2014. There was a level of significance of > 0.05 for all of the tests mentioned.…”

Section: Figure1mentioning

confidence: 99%

Bed Temperature in Compost Barns Turned With Rotary Hoe and Offset Disc Harrow

2019

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The success of confinement for dairy cattle in the compost barn model depends mainly on the management of the bed and consists of its turning. This paper characterises the spatial variability of the bed temperature in the compost barn confinement model, as well as verifying whether there was an effect on efficiency from turning the bed with different agricultural implements. The experiment was conducted during the summer and winter of 2016, with 8 days of collection in each period. Data were analysed with descriptive statistics methods and geostatistical modelling with semivariograms and kriging maps. The results of the t-test at a5% significance level indicated that, after turning the bed with the plough or rotary hoe, the temperature values were significantly lower. There was an efficient on bed turning based on different agricultural implements. Spatial dependence was observed on the data, with a better adjustment given by a Gaussian model. Kriging maps allowed the characterization of the spatial variability of bed temperature and the visualization across the compost barn bed at the superficial layer and 0.15 m in depth.

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Equações De Predição Da Energia Digestível De Ingredientes Protéicos De Origem Vegetal Utilizados Em Rações Para Tilápias

Cited by 2 publications

References 6 publications

Crude protein reduction with amino acid supplementation in tambaqui fingerling diets

Crude protein reduction with amino acid supplementation in tambaqui fingerling diets

Bed Temperature in Compost Barns Turned With Rotary Hoe and Offset Disc Harrow

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