茶树不同于其它农作物,在整个生长期中对氮素营养要求多。适当的营养水平,特别是供应足够的氮素营养元素,能够保证茶叶品质好和产量稳定增加。根据苏联的研究,氮肥用量不同,不仅影响土壤中各种形态氮的含量,而且也影响土壤的其它农业化学性状,如pH、代换性酸、水解性酸、代换铝和铁的含量,以及钙、镁、磷和钾的含量等。 Tea tree is different from other crops in the whole growing season of nitrogen nutrition requirements. Appropriate nutrition levels, especially the supply of adequate nitrogen nutrients, can ensure the good quality of tea and the steady increase of output. According to the Soviet Union, different amounts of nitrogen fertilizer not only affect the content of various forms of nitrogen in the soil, but also affect other agrochemical properties of the soil such as pH, substitutional acids, hydrolytic acids, aluminum substitution and iron content, As well as calcium, magnesium, phosphorus and potassium content.