Volume 16, Issue 3 (9-2025)
Res Anim Prod 2025, 16(3): 54-69 |
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Gazani S, Rezaei M, Kazemifard M. (2025). The Effect of Adding Emulsifier and Multienzyme in Diets Containing Rapeseed Meal with Different Energy Levels on Performance, Carcass Characteristics, Nutrient Digestibility, and Blood Parameter Concentrations in Broiler Chickens. Res Anim Prod. 16(3), 54-69. doi:10.61882/rap.2025.1476
URL: http://rap.sanru.ac.ir/article-1-1476-en.html
URL: http://rap.sanru.ac.ir/article-1-1476-en.html
1- Department of Animal Science, College of Animal Sciences and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
Abstract: (1015 Views)
Extended Abstract
Background: Due to the high price of protein sources, breeders are looking for alternative sources that are available at a lower cost. The diet energy supply also has a high cost, most of which is provided by different sources of fat and oil. Some additives, such as Vemozyme enzyme and emulsifiers, increase the availability and digestibility of nutrients, especially protein and fats. Therefore, this research was conducted to investigate the effect of adding multi-enzyme and emulsifier in diets containing rapeseed meal with different energy levels on performance, carcass characteristics, nutrient digestibility, and blood parameter concentrations in broiler chickens.
Methods: 800 one-day-old male broiler chickens of Ross 308 strain were reared in a completely randomized design with 2×2×2 factorial arrangement, including two levels of energy (recommended and 100 kilocalories less than the recommended amount), two levels of Vemozyme enzyme (0 and 0.01% of the diet), and two levels of the Lysophospholipid emulsifier (0 and 0.05% of the diet) distributed in 40 experimental units with five replications and 20 birds per replication in three starter (1-10 days), growth (11-24 days), and final (25-42 days) periods for 42 days.
Results: Adding the enzyme and emulsifier to diets with high energy levels improved weight gain during the growth period compared to diets with low energy levels. In the final period, weight gain was different using diets with a low level of energy and using the enzyme and emulsifier compared to those with the recommended level of energy without adding the enzyme and emulsifier, or using the enzyme, emulsifier, or both. In the whole period, using diets with low energy levels with enzyme and emulsifier showed no differences in weight gain compared to diets with recommended energy levels without the enzyme and emulsifier. The three interaction effects of the energy level, enzyme, and emulsifier were not significant on feed consumption in all the rearing periods. In the starter period, using the enzyme and emulsifier in diets with recommended energy levels improved the feed conversion ratio (FCR) compared to diets with low energy levels, without using the enzyme and emulsifier. In the growth period, FCR was improved by using diets with recommended energy levels and using the enzyme and emulsifier compared to low-energy diets without additives or using the enzyme, emulsifier, or both additives. In the final period, there were no differences in the FCR using diets with a low level of energy, containing the enzyme and emulsifier, compared to those with the recommended level of energy without adding the enzyme and emulsifier, or using the enzyme, emulsifier, or both additives. In the whole period, the FCR in diets with low energy levels and using the enzyme and emulsifier showed no significant difference with the FCR of diets with recommended energy without additives or using the enzyme or emulsifier. The highest carcass percentage belonged to the use of diets with recommended levels of energy and containing the enzyme and emulsifier. The highest breast percentage was observed for diets with recommended energy levels and enzyme use. The highest percentage of fat in the abdominal area and the highest percentage of gizzard belonged to the control diets with the recommended energy level. Moreover, the highest percentages of liver and pancreas were recorded for diets with recommended energy levels and containing emulsifier. The highest blood triglyceride and VLDL concentrations were found using diets with the recommended level of energy without using the enzyme and emulsifier. The use of emulsifier in diets with recommended energy levels decreased triglyceride and VLDL concentrations compared to diets with recommended energy levels without using the enzyme and emulsifier or diets with recommended energy levels using the enzyme. There were no differences in blood triglyceride and VLDL concentrations when the enzyme and emulsifier were added to diets with low energy levels. Adding the emulsifier to diets with low energy levels led to lower blood triglyceride and VLDL concentrations than diets with recommended energy levels without using the enzyme and emulsifier or using the enzyme or both additives. Diets containing enzymes showed better digestibility of organic matter, crude protein, and crude fat. Using the emulsifier in the diet improved the digestibility of protein and fat.
Conclusion: The results of this experiment show that using the multienzyme Vemozyme and emulsifier in diets containing rapeseed meal with energy levels lower than the recommended amount in the final and the whole period can effectively improve the weight, FCR, and the digestibility of crude protein and crude fat. The amount of oil in the diet was reduced by reducing 100 kcal of energy from the recommended amount of energy in the final and growth periods by about 2%, which effectively reduced the cost of the diet.
Background: Due to the high price of protein sources, breeders are looking for alternative sources that are available at a lower cost. The diet energy supply also has a high cost, most of which is provided by different sources of fat and oil. Some additives, such as Vemozyme enzyme and emulsifiers, increase the availability and digestibility of nutrients, especially protein and fats. Therefore, this research was conducted to investigate the effect of adding multi-enzyme and emulsifier in diets containing rapeseed meal with different energy levels on performance, carcass characteristics, nutrient digestibility, and blood parameter concentrations in broiler chickens.
Methods: 800 one-day-old male broiler chickens of Ross 308 strain were reared in a completely randomized design with 2×2×2 factorial arrangement, including two levels of energy (recommended and 100 kilocalories less than the recommended amount), two levels of Vemozyme enzyme (0 and 0.01% of the diet), and two levels of the Lysophospholipid emulsifier (0 and 0.05% of the diet) distributed in 40 experimental units with five replications and 20 birds per replication in three starter (1-10 days), growth (11-24 days), and final (25-42 days) periods for 42 days.
Results: Adding the enzyme and emulsifier to diets with high energy levels improved weight gain during the growth period compared to diets with low energy levels. In the final period, weight gain was different using diets with a low level of energy and using the enzyme and emulsifier compared to those with the recommended level of energy without adding the enzyme and emulsifier, or using the enzyme, emulsifier, or both. In the whole period, using diets with low energy levels with enzyme and emulsifier showed no differences in weight gain compared to diets with recommended energy levels without the enzyme and emulsifier. The three interaction effects of the energy level, enzyme, and emulsifier were not significant on feed consumption in all the rearing periods. In the starter period, using the enzyme and emulsifier in diets with recommended energy levels improved the feed conversion ratio (FCR) compared to diets with low energy levels, without using the enzyme and emulsifier. In the growth period, FCR was improved by using diets with recommended energy levels and using the enzyme and emulsifier compared to low-energy diets without additives or using the enzyme, emulsifier, or both additives. In the final period, there were no differences in the FCR using diets with a low level of energy, containing the enzyme and emulsifier, compared to those with the recommended level of energy without adding the enzyme and emulsifier, or using the enzyme, emulsifier, or both additives. In the whole period, the FCR in diets with low energy levels and using the enzyme and emulsifier showed no significant difference with the FCR of diets with recommended energy without additives or using the enzyme or emulsifier. The highest carcass percentage belonged to the use of diets with recommended levels of energy and containing the enzyme and emulsifier. The highest breast percentage was observed for diets with recommended energy levels and enzyme use. The highest percentage of fat in the abdominal area and the highest percentage of gizzard belonged to the control diets with the recommended energy level. Moreover, the highest percentages of liver and pancreas were recorded for diets with recommended energy levels and containing emulsifier. The highest blood triglyceride and VLDL concentrations were found using diets with the recommended level of energy without using the enzyme and emulsifier. The use of emulsifier in diets with recommended energy levels decreased triglyceride and VLDL concentrations compared to diets with recommended energy levels without using the enzyme and emulsifier or diets with recommended energy levels using the enzyme. There were no differences in blood triglyceride and VLDL concentrations when the enzyme and emulsifier were added to diets with low energy levels. Adding the emulsifier to diets with low energy levels led to lower blood triglyceride and VLDL concentrations than diets with recommended energy levels without using the enzyme and emulsifier or using the enzyme or both additives. Diets containing enzymes showed better digestibility of organic matter, crude protein, and crude fat. Using the emulsifier in the diet improved the digestibility of protein and fat.
Conclusion: The results of this experiment show that using the multienzyme Vemozyme and emulsifier in diets containing rapeseed meal with energy levels lower than the recommended amount in the final and the whole period can effectively improve the weight, FCR, and the digestibility of crude protein and crude fat. The amount of oil in the diet was reduced by reducing 100 kcal of energy from the recommended amount of energy in the final and growth periods by about 2%, which effectively reduced the cost of the diet.
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