Abstract
A nitrification inhibitor and dolomite were applied to two kinds of soils to clarify their effects on growth of tea plant and content of cellular constituents in the new shoots. The total leaf yield in 6 years was greater in sandy loam than that in loam. It decreased by application of dolomite at more than 200kg per 10a. The effect of nitrification inhibitor on leaf yield was not recognized. Amount of total nitrogen and amino acid contents in new shoots were higher in the new shoots grown in sandy loam compared to those grown in loam. And, they trended to be higher by application of nitrification inhibitor into the soil .They, however, became lower when dolomite was not applied. Total amount of amino acids in new shoots yielded from the field supplied with 100kg per 10a was highest in this experiment. Rate of nitrification in sandy loam was lower than that in loam. The application of dolomite accelerated the nitrification. From these results, it was concluded that amino acid content in the tea leaves, which affects the tea quality, was significantly increased by application of nitrification inhibitor and dolomite (100kg per 10a in a year).
