Nutrition of Ruminants (Dairy Cow)

With the aim to review the nutrition of ruminants, this paper studies and reviews the types of nutrition method for dairy cows by the case study of dairy cow. This research is applied based on the objective, has the library type in terms of data collection, and is among the survey research based on the research methodology. The method of library documental studies was used in order to collect data and information needed for the research and the information related to the variables of research has been extracted from the relevant organizations by referring to the latest scientific resources and accessible documents of scientific studies in the field of livestock and animal husbandry in Iran. First, the anatomy of cow gastrointestinal tract is studied in the theoretical principles and then the section of Materials and Methods provides the non-nutritional factors, nutritional factors, effect of photoperiod on the performance of dairy cows and the role of feed in the ration of dairy cows by introducing Aspergillus, blocks of nutritious, buffers and the importance of using them in the ration of ruminants including the feed changes, which lead to the increased need for buffers and buffering capacity of nutrition ingredients used in livestock feed and finally the antioxidants and their methods including the role of Antioxidants in milk supply, the role of Antioxidants in preventing from the milk spoilage, and the importance of antioxidant vitamins in the livestock health. Finally, the suggestions have been provided for scientific and accurate nutrition of dairy cows according to the nutrition principles of dairy cows.