Document Type : Research Paper
Authors
1 Former M.Sc. Student of Animal Nutrition, Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran
2 Faculty member, Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University
3 Department of Animal Science, Faculty of Agriculture, Tarbiat Modares University, Tehran
Abstract
The present study was conducted to determine the chemical composition of Echinophora sibthorpiana and Pulicaria dysenterica and the effect of dietary inclusions of these plants on in vitro ruminal fermentation parameters and digestibility. Chemical composition of the experimental plants was determined using standard methods and different levels of each plant were included in the diet. In vitro gas production technique was performed with seven treatments (control diet, diets containing 15, 30 or 45 percentage of Echinophora and diets containing 15, 30 or 45 percentage of Pulicaria) and three replicates. Results indicated that crude protein and organic matter digestibility (OMD) of Echinophora (10.4 and 61.8 percentage, respectively) were higher than Pulicaria (7.85 and 52.5 percentage, respectively) (P<0.05). Inclusion of Echinophora in the diet increased OMD and metabolizable energy, while using Pulicaria reduced these parameters (P<0.05). Ruminal ammonia decreased with inclusion of Echinophora in the diet (P<0.05), but it was not affected by Pulicaria. Dietary inclusions of Echinophora and Pulicaria decreased protozoa population and methane production (P<0.05). The ruminal antioxidant capacity was improved by inclusions of Echinophora and Pulicaria in the diet (P<0.05). Based on the results, the
use of Echinophora up to 45 percentage and Pulicaria up to 30 percentage of diet dry matter is recommended in ruminants. However, the forage to concentrate ratio should be reduced when feeding Pulicaria in high-performance animals. On the other hand, using Echinophora and Pulicaria improves ruminal antioxidant capacity and reduces methane release to the environment.
Keywords
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