Effect of orégano oil supplementation in diets formed using either crude soybean oil or acidulated soybean oil soapstock as source of energy on the growth performance parameters of broilers

Abstract

Effect of oregano oil supplementation in diets formed using either crude soybean oil or acidulated soybean oil soapstock as source of energy on the growth performance parameters of broilers Efecto de la suplementación con aceite de orégano en la dieta utilizando aceite de soya crudo o aceite de soya acidulado como fuente de energía sobre los parámetros productivos de crecimiento del pollo de engorda ABSTRACT. The type of oil used in the broiler diet is mainly based on its price; in the case of soybean oil (CSO), acidulated soybean oil soapstock (ASS) is cheaper. The aim of the present study was to evaluate the effect of oregano oil dietary supplementation when the diet contains either CSO or ASS as source of energy. 320 broilers Ross 308 were assigned to four groups: (1) CSO containing diet without oregano supplementation, (2) ASS containing diet without oregano supplementation, (3) CSO containing diet with oregano supplementation (100 mg/kg), and (4) ASS containing diet with oregano supplementation (100 mg/kg). The growth performance parameters were weekly recorded during the experiment. Data were analysed with a completely randomised design with 2 × 2 factorial arrangement and the mortality rates were adjusted using the arc-sine transformation to fulfill the analysis requirements. The results showed no effect of oregano oil (containing 30.7 and 9.7 % of thymol and carvacrol, respectively) on feed intake, weight gain and feed conversion rate. A significant interaction of energy source by oregano oil supplementation was found in mortality rates (P < 0.05); mortality was higher when the diet did not contain oregano oil and was formed using ASS. It can be concluded that the addition of 100 mg of oregano oil per kg of feed did not have a positive effect on the growth performance parameters of broilers when the diet contained either crude soybean oil or acidulated soybean oil soapstock as sources of energy.Key words: acidulated soybean oil soapstock, oregano oil, broiler, growth performance. RESUMEN.El tipo de aceite utilizado en la alimentación de los pollos de engorda se basa principalmente en su precio; en el caso del aceite de soya crudo (CSO) el aceite acidificado de soya (ASS) es más económico. El objetivo del estudio fue evaluar el efecto del aceite de orégano adicionado en la dieta cuando contiene CSO o ASS como fuente de energía. 320 pollos de engorda Ross fueron asignados a cuatro grupos: (1) CSO dieta sin adición de aceite de orégano, (2) ASS dieta sin adición de aceite de orégano, (3) CSO dieta adicionada con aceite de orégano (100 mg/kg), y (4) ASS dieta adicionada con aceite de orégano (100 mg/kg). Se registraron los parámetros de rendimiento productivo y los datos fueron analizados con un diseño completamente al azar con arreglo factorial 2 × 2 y los índices de mortalidad fueron ajustados utilizando la transformación arco-seno para cumpliar las bases para su análisis. Los resultados no mostraron efecto del aceite de orégano (su contenido 30,7% y 9,7% de timol y carvacrol, respectivamente) en consumo d...

Distributions of Polycyclic Aromatic Hydrocarbons and Phthalic Acid Esters in Gums and Soapstocks Obtained from Soybean Oil Refinery

“…For example, lecithin is widely used as a dough conditioner in baking (cake and cookie) due to its positive effects of more uniform color and texture, improved handling and pan release, and decreased mixing time (Shahidi, ). Soapstocks have been traditionally used by animal feed manufactures as an economical alternative to vegetable oils due to their relatively high metabolizable energy and essential fatty acid content (Escalera‐Valente et al, ; Pekel et al, ). Panda et al () pointed out that sunflower oil soapstock can be used as an available energy source in the diet of broiler chicken.…”

“…Therefore, degumming and neutralization may decrease the contents of PAH and PAE in the soybean oils, whereas they increase their amounts in the soybean oil gums and soapstocks, reducing the safety when using them as starting materials to produce feeds and high value‐added products due to regulatory standards promulgated by countries and organizations all over the world concerning the concentrations of these harmful pollutants in food additives and other food‐related products (EFSA, ; European Commission, ). As gums and soapstocks are important by‐products that have been widely utilized in various fields (Escalera‐Valente et al, ; Pekel et al, ; Truong et al, ), the utilization of these types of wastes has given rise to certain concerns as some of them are food chain materials. However, based on our literature review, no study investigating their distributions in soybean oil gums and soapstocks has been reported.…”