1. Demand for roughage in ruminant livestock. The content of cellulose in the roughage is more than 30%, and it plays a filling role in the digestive tract of ruminants and has the function of promoting gastrointestinal motility and improving digestibility. There must be sufficient amount of roughage in ruminant diets to fully utilize the effects of other feeds. Cows, sheep, and camels in ruminant livestock have higher digestive utilization of roughage. Under grazing conditions, natural grassland or artificial grassland can basically meet its nutritional needs. Under house-feeding conditions, ruminant livestock has a good use of straw feed. The roughage can account for 70% to 80% of the diet, the digestibility of corn straw is 40% to 45%, and the digestibility of ammoniated corn stover is 60. %about. 2. Demand for roughage for non-ruminant livestock. Non-ruminant animals refer to pigs in horses, baboons, donkeys, and omnivores in herbivores. Horses, baboons and donkeys have a more developed cecum and can use roughage in large quantities. However, roughage must be processed or mixed with appropriate amount of concentrate in order to achieve better feeding results. Pigs have poor digestion and absorption of roughage and need to process roughage into powder. The amount used is generally no more than 10% of the diet. High-quality grass flour can be slightly more, and straw powder generally accounts for 5% to 6% of the diet. There are many side effects. 3. Poultry demand for roughage. Poultry has lower digestibility and utilization of roughage, and requires roughage to be high-quality grass flour, such as grass powder such as alfalfa and clover. Roughage mainly plays a role in promoting gastrointestinal motility in poultry breeding, while nutrients are supplied by concentrate feed. Gooses and ducks in poultry prefer to eat fresh grasses and wild vegetables. The proportion of roughage in the diet may account for about 5%.
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