Valores de composição química e energética de alguns alimentos para aves

Abstract

RESUMO -O experimento foi realizado com o objetivo de determinar a composição química e os valores energéticos de oito alimentos (milho grão, milho pré-cozido I e II, farelo de canola, plasma sangüíneo, farinha de vísceras, glicose e amido de milho) para aves. Para determinação dos valores de energia metabolizável aparente (EMA) e aparente corrigida (EMAn), foi utilizado o método tradicional de coleta total de excretas, com 400 pintos de corte, machos e fêmeas, de 21 dias de idade. O delineamento experimental foi o inteiramente casualizado, com 10 tratamentos (oito alimentos e duas rações referências), e cinco repetições de oito aves por unidade experimental. Os milhos grão e pré-cozido I e II substituíram em 40% e o amido e a glicose, em 20%, uma ração referência contendo 26% proteína bruta (PB). O farelo de canola substituiu em 40% e o plasma sangüíneo e a farinha de vísceras, em 20%, uma ração referência contendo 18% PB. Os valores de matéria seca MS (%), PB (%), EMA (kcal/kg) e EMAn (kcal/kg) foram, respectivamente, para o milho: 87,72; 7,33; 3.246; e 3.235,75; 7,14; 3.385; e 3.379,88; 7,34; 3.187 Values of Chemical and Energy Composition of Some Feedstuffs for Broiler ChicksABSTRACT -The experiment was carried out to determine the chemical and the energetic values of eight feedstuffs (corn grain, corn pre-cooked I and II, canola meal, spray-dried plasma, poultry by-product meal, glucose and corn starch) for birds. To determine the apparent metabolizable energy (AME) and nitrogen corrected apparent (AMEn) values, the traditional method of total excreta collection was used, with 400 broiler chicks, male and female, 21 days old. A completely randomized design, with ten treatments (eight feedstuffs and two reference diets), and five replications of eight birds per experimental unit, was used. The corn grain and pre-cooked I and II replaced 40%, and the starch and glucose 20% of the reference diet containing 26% crude protein (CP); the canola meal replaced 40%, and spray-dried plasma and poultry by-products meal 20% of the reference diet containing 18% CP. Dry matter -DM (%), CP (%), AME (kcal/kg) e AMEn (kcal/kg) values were, respectively, for corn grain: 87.72, 7.33, 3,246, and 3,235; 7.14, 3,385, and 3,379; 7,34, 3.187 and 3.179; for canola meal: 87,53, 37,89, 1,793 and 1,778;67, 74,24, 3.503 and 3.474; 64.98, 4,293 and 4,268. For the glucose and corn starch, only the values of DM (%), AME (kcal/kg) and AMEn (kcal/kg) were determined, and for the glucose the values were 99.12, 3,170, and 3,168 and for corn starch, 85.52, 3,203, and 3201, respectively

Quality assessment of corn batches received at a feed mill in the brazilian cerrado

“…Silva (2006) 3 ) density as determined in a gravity table, and concluded that higher density corn has higher energy value due to its higher starch content. Average crude protein values ranged from 7.2 to 9.1%, with an average 8.1%, similarly to those reported by Rostagno (2005) and Rostagno (2011), of 8.6 and 7.9%, respectively, but higher than those obtained by Agostini et al (2004), who obtained 7.3%, which is close to the minimum value obtained in the present study. The CP values reported by Rodrigues et al (2001) and Freitas et al (2005) were close (9.3 and 9.8%, respectively) to the maximum values obtained in the present study.…”

“…Ether extract differences were observed, with values ranging between 3.4 and 5.1% (average of 4.0%) which are higher than those reported by Rostagno et al (2005), Freitas et al (2005), and Rostagno (2011) (3.5, 3.5, and 3.6%, respectively), but lower than that reported by Agostini et al (2004), of 4.7%.…”

“…Crude fiber content ranged between 1.4 and 2.2%, with an average of 2.0%, which was higher than the averages (1.3% and 1.7%) reported by Agostini et al (2004) and Rostagno (2011), respectively.…”

Prediction of metabolizable energy values in poultry offal meal for broiler chickens

“…Dale et al (1993), in 22 samples of by-product meal, observed that the lowest value determined from ether extract was 18.3%, and the highest was 39.4%. The real metabolizable energy values determined for these by-product meals were 3,626 and 5,247 kcal/kg, respectively.…”

“…Before this procedure to nullify the effects of humidity in the byproduct meal, the correction for the same dry basis of crude protein, ether extract, mineral matter, gross energy, calcium and phosphorus content, by adjusting the values to 92% of dry matter, was carried out, as suggested by Dale et al (1993).…”