茶树是采叶作物。在它的生长过程中对氮素的要求十分迫切,因此,在茶叶生产中人们都非常注意施用氮肥,并取得了很好的增产效果。但是,随着茶园氮肥用量的不断增加,其增产效果不断下降。因此,世界各主要产茶国家就茶树对氮素的吸收利用,氮 Tea tree is a leaf crop. In its growing process of nitrogen requirements are very urgent, therefore, people in the tea production are very attention to the application of nitrogen fertilizer, and achieved good yield. However, as the amount of nitrogen fertilizer in tea plantations continues to increase, its yield-increasing effect has been declining. Therefore, the world’s major tea producing countries on the nitrogen absorption and utilization of tea, nitrogen