Efeito da inclusão de semente de linhaça integral (Linum usitatissimum L.) na dieta de éguas através da taxa de crescimento folicular, concentração de metabólitos sanguíneos e da digestibilidade aparente

• Autor(a) principal: Soncin, Mara Regina Schimmack Pedro
• Data de Publicação: 2006
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/1726
• topic: Eqüino; Digestibilidade aparente; Nutrição; Linhaça integral; Folículo ovulatório; Estro; Colesterol; Brasil.; Equine; Apparent digestibility; Nutrition; Full flaxseed; Ovulatory follicle; Estrus; Cholesterol; Brazil.; Ciências Agrárias; Zootecnia

Two experiments were carried out to evaluate the effect of the whole flaxseed inclusion in mares diet through the growth follicle rate, blood metabolites (glucose, triglycerides, progesterone, total cholesterol, high density lipoprotein - HDL, low density lipoprotein - LDL and very low density lipoprotein - VLDL) concentrations and of the nutritional value determination through apparent digestibility test to obtain an alternative food source to use in the equine nutritional and reproductive formulation programs. The experiment was realized at the Eqüideocultura section in the Experimental Farm of Iguatemi (FEI) belonged to the State University of Maringá (UEM). Sixteen Mangalarga mares with an average of 8.8 years old and 374.60 kg of weight were used. The treatments consisted of two concentrated, being one the control (without whole flaxseed - TES) and the other one with inclusion of 10% of whole flaxseed (LIN). A completely randomized design was used. To determine the reproductive parameters and evaluation of the blood metabolites concentration the animals received 1 ml/animal (100 mcg) of an intramuscular injection of prostaglandin F2 alpha, the rut behavior was observed visually and confirmed through ruffin. The growth follicle was daily observed through ultrasound until the ovulation, in the 10th day after ovulation it was done a blood collection in the jugular vein and then the serum was analyzed, measuring the glucose levels, total cholesterol, cholesterol-HDL, cholesterol-LDL, cholesterol-VLDL, triglycerides and progesterone. The results obtained for estrous duration, time between PGF2alfa-estrous and ovulated follicle size were 7.75 and 7.42; 3.8 and 3.5; 38.75 and 39.25 respectively, to diet test and with 10% of linseed seed, and the results obtained for progesterone, total cholesterol, cholesterol-LDL, cholesterol-HDL, cholesterol-VLDL, glucose and triglycerides were 8.3 and 6.63 ng/ml; 86.8 and 85.5 mg/dl; 33.3 and 34 mg/dl; 48 and 45.6 mg/dl; 5.5 and 5.8 mg/dl; 100.167 and 88.83 mg/dl; 27.5 and 28.8 mg/dl respectively, to control diet and with 10% of linseed seed. The method of total collection of feces was used to determine the digestibility coefficients. After laboratories analyses it was evaluated the coefficients of apparent digestibility (CDa) to MS, MM, PB, FB, FDN, FDA and EE. The inclusion of the whole flaxseed significantly (P <0.05) increased the CDa of MS, MM, FB, FDN and FDA. On the other hand, a difference was not observed (P>0.05) for CDa of PB and EE, independent of the inclusion or not of the linseed seed in the experimental concentrate. The values found to the TES and LIN treatments were, respectively, of: CDaMS (67.44 and 76.11%), CDaMM (38.32 and 56.42%), CDaPB (79.82 and 81.15%), CDaFB (51.91 and 69.53%), CDaFDN (55.09 and 69.30%), CDaFDA (48.60 and 64.56%) and CDaEE (59.47 and 60.21%). The results observed in the present experiment indicated that the inclusion of the whole flaxseed (level of 10%) in equine diet did not change the reproductive profile and also did not alter the blood parameters in that work for Mangalarga mares, however, they significantly improved the nutrients apparent digestibility coefficient, especially of the diet fibrous fraction, contributing efficiently in the formulations of equine diets equine.