Inclusion of soy oil levels on the acceptability and digestibility of diets for equines

The effects of different quantities and types of dietary fats on the digestibility of feeds for equines are complicated and not fully understood. The present work was undertaken to evaluate the acceptability and digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), and neutral and acid detergent fibers (NDF, ADF), upon increasing inclusion levels of soybean oil (SBO) (5, 10, 15 and 20%) in the concentrate portion of diets composed of equal parts of grass hay and concentrate. The total collection of feces method was used with four yearling colts. The experimental design was 4 x 4 Latin square and the data were analyzed by simple polynomic regression. The SBO showed good acceptability as all of the concentrates offered were consumed. Level of SBO inclusion in the concentrate affected (P < 0.05) OM digestibility, there being and initial increase up to a maximum of 66.7% at the 10.74% inclusion level and decreasing digestibility thereafter; in analogous fashion the digestibilities of NDF and ADF increased to maxima of 51.8% and 45.5% at SBO inclusion levels of 9.5% and 10.56%, respectively. The lower digestibilities at higher inclusion levels were presumably due to inhibitory effects of added lipid on the cecal cellulolytic microflora. Level of SBO inclusion did not significantly affect the digestibilities of DM, CP and EE, although DM digestion followed a quadratic tendency (P = 0.08) very similar to that observed for OM

Avaliação da influência das pontas excessivas de esmalte dentário na digestabilidade dos carboidratos estruturais em equinos

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Efeito da inclusão de níveis de óleo de soja sobre a aceitabilidade e digestibilidade de dietas para eqüinos

The effects of different quantities and types of dietary fats on the digestibility of feeds for equines are complicated and not fully understood. The present work was undertaken to evaluate the acceptability and digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), and neutral and acid detergent fibers (NDF, ADF), upon increasing inclusion levels of soybean oil (SBO) (5, 10, 15 and 20%) in the concentrate portion of diets composed of equal parts of grass hay and concentrate. The total collection of feces method was used with four yearling colts. The experimental design was 4 x 4 Latin square and the data were analyzed by simple polynomic regression. The SBO showed good acceptability as all of the concentrates offered were consumed. Level of SBO inclusion in the concentrate affected (P < 0.05) OM digestibility, there being and initial increase up to a maximum of 66.7% at the 10.74% inclusion level and decreasing digestibility thereafter; in analogous fashion the digestibilities of NDF and ADF increased to maxima of 51.8% and 45.5% at SBO inclusion levels of 9.5% and 10.56%, respectively. The lower digestibilities at higher inclusion levels were presumably due to inhibitory effects of added lipid on the cecal cellulolytic microflora. Level of SBO inclusion did not significantly affect the digestibilities of DM, CP and EE, although DM digestion followed a quadratic tendency (P = 0.08) very similar to that observed for OM.Los efectos de diversas cantidades y tipos de grasas dietéticas sobre la digestibilidad de los alimentos equinos son complejos y no completamente entendidos. El presente trabajo tuvo como objetivo evaluar la aceptabilidad y digestibilidad de la materia seca (MS), materia orgánica (MO), proteína bruta (PB), extracto etéreo (EE) y fibras detergente neutro y ácido (FDN, FDA) al incorporar niveles crecientes de aceite de soja (5, 10, 15 y 20%) en la porción concentrado de dietas compuestas de partes iguales de heno de gramínea y concentrado. Se usó la metodología de colección total de heces fecales con cuatro potros añeros. El diseño experimental fue un cuadrado latino 4 x 4 y se analizaron los datos por regresión simple polinómica. El aceite de soya mostró buena aceptabilidad, siendo consumidos todos los concentrados ofrecidos. El nivel de aceite de soya en el concentrado afectó (P < 0.05) la digestibilidad de MO, habiendo inicialmente aumento hasta el punto máximo de 66.7% a 10.74% de inclusión y luego digestibilidad decreciente; a modo análogo aumentaron las digestibilidades de FDN y FDA a puntos máximos de 51.8% y 45.5% a inclusiones de 9.5% y 10.56%, respectivamente. Las menores digestibilidades a mayores niveles de aceite se deben presumiblemente al efecto inhibidor del lípido sobre la microflora celulolítica del intestino ciego. El nivel de inclusión de aceite de soya no tuvo efecto significativo sobre las digestibilidades de MS, PB y EE, pero la de MS mostró una tendencia cuadrática (P = 0.08) muy parecida a la observada para MO

Productive performance of simmental dairy cows supplemented with ricinoleic acid from castor oil

The aim of this study was to evaluate the performance and blood parameters of Simmental dairy cows, supplemented with 2 g/day of ricinoleic acid (RA) in diet. Forty Simmental dairy cows in mid lactation, individually housed in stable type tie- stall, were used. The animals were randomly assigned to two treatments: 0 or 2 g of RA/animal/ day. The experimental period consisted of 42 days divided into two 21-day. It was observed reduction in dry matter intake (DMI), increased milk, fat and FCM (fat corrected milk) yield, as well as increased of fat content of milk in cows that received RA in diets. No effects were observed for red and white blood cells and blood metabolites. Supplementation of RA improves performance of dairy cows in mid lactation.O objetivo deste estudo foi avaliar o desempenho e os parâmetros sanguíneos de vacas leiteiras simental suplementadas com 2 g/ dia de ácido ricinoleico (AR) na dieta. Foram usadas 40 vacas leiteiras da raça Simental no meio da lactação, alojados individualmente em tie-stall. Os animais foram divididos aleatoriamente em dois tratamentos: 0 ou 2 g de RA / animal / dia, fornecido via concentrados. O período experimental consistiu de 42 dias, divididos em dois períodos de 21 dias. Foi observada a redução no consumo de matéria seca (CMS), aumento da produção de leite, gordu- ra e produção corrigida 3,5 %, bem como um aumento do teor de gordura do leite em vacas que receberam AR na dietas. Nenhum efeito foi obser- vado para os glóbulos vermelhos e brancos e metabólitos no sangue. Suplementação de AR melhorou o desempenho de vacas leiteiras no terço médio de lactação

Avaliação hematológica e bioquímica de equinos suplementados com óleo de arroz semirrefinado, rico em gamaorizanol Hematological and biochemical evaluation of horses supplemented with semi-refined rice oil enriched with gamma orizanol

Avaliou-se o efeito da suplementação com óleo de arroz sobre o peso e perfil hematológico de equinos submetidos a exercício físico moderado. Foram utilizados 14 equinos machos, com peso aproximado de 411kg, distribuídos entre o grupo tratado (GT; n=7), suplementado com óleo de arroz adicionado diariamente à dieta (0,5ml/kg/PV), e o grupo-controle (GC; n=7), tratado com óleo de soja (0,5ml/kg/PV). Foram feitas três avaliações: antes do início e aos 20 e 40 dias após o início do tratamento, as quais consistiram de determinação do peso, exame clínico e coleta de amostras de sangue dos animais, antes e após o exercício, para hematócrito, hemograma, dosagem de glicose, lactato e proteína total. Não houve diferença entre grupos e nem entre avaliações quanto às variáveis peso e proteína total. A glicose aumentou significativamente após o exercício na segunda coleta no GC e na terceira no GT. No GC, o lactato aumentou nas coletas após o exercício, enquanto no GT, os valores foram semelhantes antes e após. A suplementação com óleo de arroz na dieta foi determinante para impedir o aumento de lactato em equinos submetidos a exercício, o que pode ser relevante para aumentar o seu desempenho atlético.<br>The effect of the supplementation with rice oil was evaluated on the weight and hematologic profile of equines submitted moderate physical exercise. Fourteen male equines, averaging 411kg, were distributed into treated group (GT; n=7), supplemented daily with rice oil added to the diet (0.5ml/kg/BW); and control group (GC; n=7), treated with soybean oil (0.5ml/kg/BW). Three evaluations were made before the treatment, and 20 and 40 days after the beginning of the treatment, consisting of the determination of the weight, the clinical examination, and the collection of blood samples before and after the exercise for hematocrit, hemogram, glucose, lactate, and total protein determinations. There was no difference between the groups, neither between evaluations for weight nor total protein. The glucose increased significantly after the exercise in the second collection in the GC and in the third in the GT. The GC lactate increased significantly in the collections after exercise; while in the GT, the results were similar before and after treatments. The supplementation of the diet with rice oil was determinant to hinder the lactate increase in the animals submitted to exercise, what could be relevant to increase their athletic performance