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尿素可以作肥料,为什么又可以作飼料呢?这是因为尿素在牛、羊等反芻动物的瘤胃中能为許許多多的微生物所分泌的脲酶分解为氨和二氧化碳,分解出来的氨再和碳、氧、硫等元素合成微生物自身的蛋白质,而后这些微生物随食物一起进入牛、羊的真胃,被胃液消化放出“制造好了的蛋白质’供畜体利用。据分析一分尿素相当于2.6分可消化蛋白质。在牛羊日粮里每合理地加入一公斤尿素可增产奶品8～10公斤、肉0.6～0.8公斤和毛0.2～0.3公斤。因此,使用尿素作为牛、羊蛋白质的补充来源已被苏联等国家所广泛应用,成为提高牛、羊生产力的重要途徑之一。但是尿素不能用于猪、馬等单胃动物,因为它們的胃中沒有适合微生物生活的条
Urea can be used as a fertilizer. Why can it be used as feed? This is because urea in the rumen of cattle, sheep and other ruminants can be decomposed into ammonia and carbon dioxide by urease enzymes secreted by many microorganisms. Elements such as oxygen, sulfur, etc. synthesize microorganisms’ own proteins, and then these microorganisms enter the true stomach of cattle and sheep along with food, and are digested by gastric juice to release “produced proteins” for use by the carcass. According to the analysis, one point of urea is equivalent to 2.6 Subdigestible protein.Adding one kilogram of urea in a cow and sheep diet can increase production of 8 to 10 kg of milk, 0.6 to 0.8 kg of meat, and 0.2 to 0.3 kg of hair. Therefore, urea is used as a supplement to the protein of cattle and sheep. The source has been widely used by countries such as the Soviet Union and has become one of the important ways to increase the productivity of cattle and sheep, but urea can not be used in monogastric animals such as pigs and horses, because there is no strip of stomach suitable for microbiological life.