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“肥”是农业“八字宪法”一项重要内容。氮肥是农作物生长过程中需要量最大的一种肥料。氮素是各种作物生长发育所必需的营养元素,是无机氮肥的主要成分,并且广含于农家有机肥料之中。实践证明,科学地施用氮肥,有效地调节土壤中的氮素,对于提高土地肥力和促进农业增产具有显著效果。因此,了解氮素的化学特性,分析农作物的氮素营养和自然界氮素的动态,掌握各种氮肥的性能和施用技术等,对于发展农业生产具有一定的现实意义。
“Fat” is an important part of agriculture’s “Character Constitution.” Nitrogen fertilizer is one of the most needed fertilizers for crop growth. Nitrogen is a nutrient essential for the growth and development of various crops and is the main component of inorganic nitrogen fertilizers, and is widely contained in farm organic fertilizers. Practice has proved that the scientific application of nitrogen fertilizers to effectively regulate nitrogen in the soil, for improving land fertility and promote agricultural production has a significant effect. Therefore, understanding the chemical characteristics of nitrogen, analyzing the nitrogen nutrition of crops and the dynamics of nitrogen in nature, and mastering the performance and application technology of various nitrogen fertilizers have certain practical significance for the development of agricultural production.