Utilização da Energia de Dietas para Frangos de Corte Formuladas com Óleo Ácido de Soja

Abstract

O produto comercialmente chamado "óleo ácido de soja", resulta da acidificação da borra residual do processo de refino do óleo de soja. Este tem sido muito utilizado na indústria de rações animais, ainda que com vários questinamentos a cerca de sua eficiência, tais como a adulteração com outros ácidos graxos de baixo valor nutricional, nível de peroxidação, presença de impurezas, e valores energéticos não confiáveis. Neste estudo, foi avaliado o desempenho de frangos de corte consumindo dietas contendo óleo de soja ou óleo ácido de soja nos níveis de 4 e 8% ou a mistura das duas fontes em partes iguais de 2 e 4% cada. Essas dietas foram fornecidas para frangos de corte alojados em baterias climatizadas a partir dos 7 dias de idade. As aves que receberam misturas equivalentes de óleo ácido de soja e óleo de soja apresentaram menor peso corporal no final do experimento (aos 42 dias) quando comparadas com aquelas que consumiram apenas óleo ou óleo ácido de soja, independentemente do nível adicionado. O nível de inclusão de óleo de soja ou óleo ácido de soja não influenciou o peso final das aves. Foi verificado maior consumo de ração pelos animais que receberam dietas de menor nível de inclusão, o que contribuiu para piorar a conversão alimentar dos mesmos. O óleo ácido de soja demonstrou ser uma fonte energética alternativa de alto potencial econômico para uso em dietas comerciais para frangos de corte, apresentando valor energético de 8.114 kcal EMAn/kg de MS, valor 5% inferior ao determinado para o óleo de soja degomado.

Effects of the reduction of dietary heat increment on the performance, carcass yield, and diet digestibility of broilers submitted to heat stress

“…Pucci et al (2003) also did not find significant effect of higher oil inclusion in the feed on dry matter digestibility, when feed intake and excreta were corrected after kaolin withdrawal. On the other hand, Bonnet et al (1997) e Vieira et al (2002) observed a reduction in dry matter digestibility in birds fed diets containing higher fat levels. Environment and diet had no influence on protein digestibility, in agreement with the study with layers under CHS of Koelkebeck et al (1998).…”

Oil and fat in broiler nutrition

“…Birds fed beef tallow had the poorest conversion rate. Vieira et al (2002) evaluated broiler rations containing 0, 4 and 8% of soybean oil and acidulated soybean oil soapstock, and observed similar weight gain between the different lipidic sources and improved feed conversion in birds fed with soybean oil in comparison to the birds fed with acidulated soybean oil soapstock. They also observed a reduction in feed intake of birds fed with acidulated soybean oil soapstock when the inclusion level was increased from 4 to 8%, whereas no reduction in feed intake was observed in birds fed with soybean oil.…”

“…The inclusion of acidulated soybean oil soapstock in rations for animals depends on the maintenance of a minimum of quality control, so that the product has surely not been adulterated by the inclusion of other low-quality oils (Vieira et al, 2002).…”

Crude corn oil with high acidity in broiler feed

“…It is worth noting that the use of regional products, such as agroindustrial co-products, can make production costs even more feasible, in relation to transport and acquisition (RODRIGUES FILHO; AZEVEDO, 2006). These co-products do not compete with human food (ZAMBOM et al, 2001) and, if used, they do not accumulate in the environment, especially in the soil and water, contributing to sustainable animal production and preserving natural resources (BRAS et al, 2014). Studies have shown that these agroindustrial co-products can provide about 3 trillion Mcal of metabolizable energy (ME) per year (GOES et al, 2008).…”

“…Studies have shown that these agroindustrial co-products can provide about 3 trillion Mcal of metabolizable energy (ME) per year (GOES et al, 2008). Therefore, the CCOHA has become an option of energetic ingredient for the formulation of broiler ration, being able to act on both the performance and the quality of the carcass (VIEIRA et al, 2002).…”