尿素是生产上常用含氮量最高的一种固体化肥。目前，生产上施用尿素存在的最大问题是地面撤施．有些农民认为尿素是颗粒肥，就能撒施、实际上是一种极大的浪费。为什么这样说呢？这是因为：尿素是一种不是“气肥”的气肥。也就是说，尿素在溶解后，开始呈分子状态，这时不是气肥 Urea is the most commonly used nitrogen fertilizer in production of a solid fertilizer. At present, the biggest problem with urea in production is ground withdrawal. Some farmers think urea is a granular fertilizer that can be sprinkled, in fact, a tremendous waste. Why do you say this way? This is because: urea is not a “gas fertilizer” gas fertilizer. In other words, urea dissolved in the beginning of the molecular state, then not gas fertilizer