Intake, nutrient apparent digestibility and ruminal constituents of sheep fed diets with canola, sunflower or castor oils

Abstract

The objective in this experiment was to determine the effects of feeding diets with canola, sunflower or castor oils on intake, nutrient apparent digestibility and ruminal constituents of crossbred Dorper × Santa Inês sheep. Four rumen-cannulated animals of 90.2±11.4 kg average body weight were assigned to a 4 × 4 latin square. Animals remained individually in cages for the metabolism assay and were fed diets containing roughage at 500 g/kg and concentrate based on ground corn and soybean meal also at 500 g/kg. No oil was added to the control diet, whereas the others had canola, sunflower or castor oils at 30 g/kg (DM basis). There was no difference for the intake of DM and nutrients, except for ether extract, which was greater when animals received oil. The digestibility coefficients of dry matter, organic matter, crude protein, non-fiber carbohydrates and neutral detergent fiber were not changed; however, the addition of oil increased the ether extract digestibility. The values of total digestible nutrients (TDN, g/kg of DM), digestible energy (DE, Mcal/kg of DM), TDN intake and DE intake also did not change with the addition of lipids. Concerning the ruminal constituents, the addition of vegetable oils reduced the concentrations of acetate, butyrate and total short-chain fatty acids. Adding canola, sunflower or castor oils at 30 g/kg in diets with 500 g roughage/kg and 500 g concentrate/kg does not impair the intake or digestibility of nutrients in sheep, although it reduces the concentration of short-chain fatty acids in the rumen

Influence of Different Vegetable Oils on In Vitro Ruminal Fermentability and Nutrient Digestibility in Ettawah Crossbred Goat

“…The highest concentration was obtained from the 5% kapok seed oil. The result of this study was higher (15.3 to 17.4 mg/dl) than that of addition of canola, sunflower and castor oil (Maia et al, 2012) and in addition of blended palm oil and canola oil on 0 -8% which ranged from 11.03 -12.5 mg/dl (Adeyemi et al, 2015). Leng (1990) reported that 10-20 mg/dl NH3 was optimum to digest fibrous feed by rumen microbes.…”

“…Khaing et al (2016) stated that propionate is the precursor of the gluconeogenesis process which could increase glucose synthesis as an energy source for ruminant. This result was lower than A/P ratio in supplementation of canola, sunflower and castor oil within 2.8 -3.2 (Maia et al, 2012) or mixed canola and palm oil in a range of 2.71 -3.61 (Adeyemi et al, 2015).…”

Feeding behavior, nutrient digestibility, feedlot performance, carcass traits, and meat characteristics of crossbred lambs fed high levels of yellow grease or soybean oil

“…Awawdeh et al (2009b), feeding Awassi finishing lambs 3.2% YG, also observed no difference in digestibility of DM, OM, ADF, NDF, or CP, but showed a higher ether extract digestibility in oil supplemented diets, similar to results of the current study. Yamamoto et al (2005); Maia et al (2012), and Morgado et al (2014), also observed an increased ether extract digestibility when oil was added in diets for lambs.…”

Consumo, digestibilidade e balanço de nitrogênio de cordeiros alimentados com alto teor de amido ou fibra solúvel em detergente neutro associados ao óleo de girassol

“…Eifert et al (2006) avaliaram a associação de 2,25% de óleo de soja a diferentes fontes de carboidratos, milho, farelo de trigo e polpa cítrica, na alimentação de vacas e também não observaram efeito das fontes de carboidratos e da inclusão de óleo sobre a digestibilidade da PB. Ausência de efeito da inclusão de óleo às dietas sobre a digestibilidade da PB, em ovinos foi verificado na literatura por Kucuk, Hess e Rule (2004) e por Maia et al (2012).…”