尿素是由碳、氮、氧和氢组成的有机化合物,外观是白色晶体或粉末。它是动物蛋白质代谢后的产物,通常用作植物的氮肥。尿素除了作追外,还有其它多种用途。一、调节花量为了克服苹果树大小年,遇小年时,于花后 Urea is an organic compound of carbon, nitrogen, oxygen, and hydrogen that looks like white crystals or powder. It is a product of animal protein metabolism and is commonly used as a nitrogen fertilizer for plants. In addition to chasing urea, there are many other uses. First, adjust the amount of flowers In order to overcome the size of the apple tree in the case of a small year, after flowering