シャコウ ショリ ガ チャメ ノ セイイク ニ オヨボス エイキョウ

Abstract

遮光処理が新芽の生育および樹冠面の生育差改善に及ぼす影響を調査した。遮光処理により摘芽数が少なく減収したが,出開きの進み方が遅く,新芽の水分含量,葉緑素含有量および窒素含有率が高く,高品質が保持された。葉中の全窒素含有率が高くなるとエチレン生成量が減少する傾向がみられ,茶葉の老化抑制に結びついた。また,遮光栽培は,傾斜地茶園の樹冠面にみられる新芽の生育差を是正する効果が認められた。The shading culture decreased the number of new shoots and the yield. This is mainly due to slow elongation of new shoots. The result also indicated that the content of water, chlorophyll and nitrogen was high. Under shading condition,the content of total nitrogen in tea leaves was high, while the generation of ethylene decreased. Thus, tea leaves were retarded to deteriorate. It seems that shading cultivation was effective to correct the growth and development differences of new shoots observed in canopy surface of hillside tea field