作者：邱禮弘　陳榮五

　　 蜜紅葡萄為一色澤鮮紅、果粒大、風味佳之鮮食用葡萄品種；其缺點是果實硬度不夠，不耐貯運。因此，如能提高其果實硬度，就能增加其產業競爭力。本研究利用不織布排水涵管來增進栽培床之排水及通氣性，並配合不同葉面鈣肥施用；期望果實發育階段，若遭逢雨期，可改善果實硬度之軟化程度。經試驗資料顯示，排水設施埋置可顯著提高果實之硬度及果穗重量，而且能降低畦床土壤中 Zn 含量及 EC 值；而葉面鈣肥以磷酸一鈣 0.5% 或有機鉗合鈣 0.5% ，皆可顯著性提高其硬度，又不會影響果穗重量。

關鍵字： 蜜紅葡萄、排水設施、鈣肥、硬度。

　　The Honey Red grape is one kind of table fruit. Its berry possesses redness pericarp, good flavor and bigger size characters, but the disadvantage is fruit softening easily which reduces the storage and shelf life. Therefore, improvement on fruit firmness can also enhance the competitiveness of Honey Red grape industry. In order to improve fruit firmness during berry development stage in rainy days the experiment used nonwoven drainer-establishment to improve the drainage and pneumatic function of culture bed. Effects of foliar fertilization in flowering stage by calcium phosphate or EDTA-Ca were also investigated. The major items analyzed were fruit cluster weight, firmness, total soluble solid and acidity. The results indicated that both fruit firmness and fruit cluster weight can be increased by nonwoven drainer-establishment treatment in culture bed, the treatment also decreases the zincic content (Zn) and electrical conductivity (EC) of vineyard. Both foliar fertilization treatments by calcium phosphate 0.5% and EDTA-Ca 0.5% can enhance fruit firmness, without adverse effects on fruit cluster weight.

Key words: Honey Red grape, drainer-establishment, calcium, firmness.