香蕉施肥與葉片營養診斷研究（一）不同品種、葉片內不同部位及不同生長期對葉片無機營養影響之研究

Fertilizer Management and Nutritional Diagnosis in Banana (Ⅰ) Effects on Leaf Mineral Content with Reference to Varieties, Different Parts of Laminae and Different Growth Seasons

為確立臺蕉之葉片分析制度，因些就臺灣外銷香蕉品種間，葉片內不同部位及不同季節生產蕉之抽穗時期之葉片養分濃度加以比較，發現品種間之葉片氮、磷及鉀素含量，北蕉及仙人蕉間並無差異；各品種葉片氮、磷素含量於各月份生長期中並無顯著差異。而葉片鉀素含量在各月份生長期中則呈極顯著差異。葉片之取樣部位以取自靠中筋之部位較能代表植株之營養狀況，鉀素含量則愈靠近中筋部位者含量愈高，且呈極顯著差異。就抽穗時蕉株之營養狀況言，各季節蕉間葉片鉀素含量呈極顯著差異；磷素、氮素含量則呈顯著差異。

In order to establish the analysis system of banana leaves in Taiwan, this experiment was conducted to compare the nutritional status of banana leaves between varieties, different portion within a laminae and the seasonal effect using two exporting varieties (Pei-Chiaio and Sheng-Zen-Chiao) as the materials. The results indicated that there was no difference in N, P, K content in the leaf blades between varieties On seasonal effect, no significant difference showed its N, P content between varieties in different months, while K content revealed a very significant difference in different months. About leaf sampling, the portion of representing specialty on nutritional status may be obtained near the midrib of the blade and it was shown that K content significantly increased along the midrib. In view of the nutritional status in different seasons the N, P, K content showed statistical difference in shooting plants.