Examinated results for bring light on the kinds of slow-release fertilizers are summarized as follows. Among slow-release fertilizers, the yields of the 1st harvested tea leaves in the T₂ treatment was higher 9±4% with values of 366mg/100g than in other slow-release fertilizers treatment(325~352mg/100g), and was higher 14% than in traditional manuring (321mg/100g). The contents of chemical components such as total nitrogen, total amino acid, chlorophyll, vitamin C and free sugar were somewhat higher in T₂ treatment than those of other tratments. However, the content of tannin and caffeine were slightly lower than in the other treatment. The contents of theanine, glutanic acid and arginine as a good teaste component of green tea were higher in the T₂ treatment than in the other slow-release fertilizers and traditional manuring. In scoring test, the slow-release fertilizers treatment was not different the traditional manuring significantly. The yield and quality of T₂ treatment were more excellent than in other slow-release fertilizers and in traditional mauring.
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