Oat grass is a one-year old plant in the family Poaceae, belonging to the oat grass genus. It has high feeding value in livestock and poultry farming, and has strong adaptability to the environment, making it a high-quality forage resource. Oat grass, as one of the commonly used roughage rich in crude fiber for ruminants such as cattle and sheep, has rich nutritional value. Proper feeding can increase the number of ruminations in ruminants, increase saliva secretion, effectively prevent rumen acidosis, improve livestock and poultry production performance, and increase milk production of cows. Therefore, it is widely used in animal husbandry....