عنوان مقاله [English]
Background and objective: Nowadays up to 60 percent of the animal breeding cost is related to the animal feed, the importance of livestock feed production due to the lack of agricultural resources, including land and water resources, will double. One of the new management methods to reduce the cost of animal breeding and also reduce the environmental pollution is the use of agricultural waste in feeding ruminants. Maize bran is one of the corn substitutes, which, due to its low cost and high nutritional value, increases animal productivity. The present study was conducted to investigate the effect of using different levels of maize bran on performance, nutrient digestibility and ruminal behavior of Dalagh ewes.
Materials and methods: In order to investigate the effect of using different levels of maize bran on performance, nutrient digestibility and ruminal behavior of dalagh ewes, 20 Dalagh ewes with average body weight of 36.3 ± 3.7 was used. This experiment was conducted in a completely randomized design with four treatments and five replications. The treatments consisted of 1- control treatment (without maize bran), 2- treatment containing 7 percent of maize bran, 3- treatment containing 14 percent of maize bran and 4- treatment containing 21 percent of maize bran. The whole period of the experiment was carried out in 35 days, consisting of 28 days of adaptation period and 7 days for sampling period. Fecal samples were collected on days 31 to 35 for 5 days and 4 animals from each treatment. On the day 29 and 30, activities on ruminal behavior of ewes were estimated for 24 hours.
Results: Based on the results of this experiment, using maize bran at 0, 7, 14 and 21 percent in ewe’s diet did not significantly increase daily weight gain, final weight and dry matter intake. Also, there was no significant difference in the digestibility of nutrients, dry matter, organic matter, crude protein, ADF and NDF and ether extract. The use of maize bran at different levels in relation to nutritional behavior and ruminal activity does not have a significant effect.
Conclusions: This study showed that there is no significant difference between treatments receiving maize bran with different levels and control treatment in terms of performance parameters, feed intake, digestibility and behavior of ruminal feed intake. According to the results, maize bran up to 21 percent can be used in Dalagh ewes.
Keywords: maize bran, digestibility of nutrients, feed intake, ruminal behavior, Dalagh ewes