Third, as the demand for feed grains in various countries continues to grow, leading to a shortage of feed grains. This forces people to try to use coarse fodder and straw to develop animal husbandry, and give priority to the development of herbivorous livestock. my country’s straw resources are very rich. According to statistics, the country’s annual output of various crop straws amounts to 600 million tons, accounting for 20 to 30% of the world’s total straw production, and its amount is equivalent to more than 50 times the amount of grass culled in the northern grasslands.