Examinated results for bring light on the kinds of slow-release fertilizers are summarized as follows. The soils experiment yield were higher in contents of O.M and Av. P₂O5 than general upland soils, with valve of pH 4.4. Among slow-release fertilizers, the yields of the 2nd harvested tea leaves in the Ta treatment were 3~6% higher than other treatment, but were not different significantly compared with trational manuring. The contents of total nitrogen, total amino acid, chlorophyll and vit. C were higher in the T₂treatment than in the other slow-release fertilizers and the traditional manuring, while contents of tannin and caffeine appeared a contrary tendency. The contents of theanine and glutamic acid as a good taste component of green tea were higher in the T₂treatment than in the other treatments and the traditional manuring. In scoring test, the slow-release fertilizers treatment was not different the traditional manuring significantly. Among 5 kinds of slow-release fertilizers, the yield and quality of T₂treatment were more excellent than in any other slow-release fertilizers.
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