mohammad reza jamali; Mohammad Reza Ghorbani; ali aghaei; mohammad noshad
Volume 23, Issue 1 , March 2021, , Pages 131-142
Abstract
This experiment was conducted to study the effect of different dietary n-6: n-3 fatty acid (FA) ratio on performance, egg quality, some blood and reproductive parameters of Japanese quails breeder. A total of 720 Japanese quails (Coturnix coturnix japonica) were used in a completely randomized ...
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This experiment was conducted to study the effect of different dietary n-6: n-3 fatty acid (FA) ratio on performance, egg quality, some blood and reproductive parameters of Japanese quails breeder. A total of 720 Japanese quails (Coturnix coturnix japonica) were used in a completely randomized design with five treatments, six replicates and 24 birds (16 females and eight males) in each replicate. Dietary treatments were control (n- 6: n-3 FA ratio were 13:1) and different n-6: n-3 FA ratios (1:1, 3:1, 6:1 and 9:1). The results showed that, quails fed diet with n-6: n-3 FA ratio of 1:1 had the highest feed intake in comparison with the others (P <0.05). Egg mass of quail was increased significantly when their diets containing n-6: n-3 FA ratio of 6:1, in comparison with 9:1 and control (P <0.05). The birds fed diets containing n-6: n-3 FA ratio of 1:1 and 6:1 had higher eggs Haugh unit rather than control (P <0.05). Feeding quails with diets containing n-6: n-3 FA ratio of 1:1 to 9:1 reduced serum triglyceride concentration compared to the control group. Blood cholesterol concentration of birds that fed diets containing n-6: n-3 FA ratio of 1:1 and 6:1 was lower than control and blood glucose was the highest in the birds that fed diets containing n-6: n-3 FA ratio of 1:1 (P <0.05). The results of this experiment showed that the use of dietary n-6: n-3 FA ratio of 6:1 in breeder quail diets can improves production performance.
Amir Hossein Rezakhani; Younes Ali Alijoo; Kamran Rezayazdi
Volume 22, Issue 1 , March 2020, , Pages 55-65
Abstract
This study was carried out to assess the effects of two types of fatty acids-calcified salts on the performance of dairy cows in the transition period. In total, 32 multiparous Holstein cows with body weight mean of 723=39.9 kg in a 6-week time range (three weeks before until three weeks after ...
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This study was carried out to assess the effects of two types of fatty acids-calcified salts on the performance of dairy cows in the transition period. In total, 32 multiparous Holstein cows with body weight mean of 723=39.9 kg in a 6-week time range (three weeks before until three weeks after parturition) were assigned to treatments in a completely randomized design. There were four diets including control (without fat supplement), diet supplemented with unsaturated fat, diet supplemented with saturated fat and diet supplemented with both unsaturated and saturated fats. Fat supplements as calcium salts were applied at the level of 1.5% and 3% in the pre-partum and post-partum diets,respectively. Based on the results, it turned out that pre-partum DM feed intake, post-partum body weight and body condition score were not affected by the diets, whereas, post-partum DM feed intake appeared to be different (p < 0.05). In addition, the digestibility coefficient appeared to be different among pre- and post-partum trial diets (p < 0.05). However, no significant difference was observed for blood parameters as well as milk yield and its composition. In conclusion, the results revealed that fat sources as calcium salt supplements can improve the digestibility of nutrients in the digestive system, without any adverse-effects on performance in dairy cows.