中国是世界上最大的化肥生产国和消费国。随着化肥用量的增加,作物产量也得到明显的提高。在农业生产中,化肥功不可没。作物所必需的营养元素包括:碳、氢、氧、氮、磷、钾、钙、镁、硫、铁、锰、锌、铜、硼、钼、氯和钠等17种元素。碳、氢、氧主要靠空气和水供应,其余的元素大多来自于土 China is the largest fertilizer producer and consumer in the world. With the increase of the amount of fertilizer, crop yield has also been significantly improved. In agricultural production, fertilizers contributed. The necessary nutrients for crops include 17 elements including carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, boron, molybdenum, chlorine and sodium. Carbon, hydrogen, oxygen are mainly supplied by air and water, and most of the remaining elements come from soil