茶樹母樹處理對扦插苗生育之影響

Abstract

良好的母樹管理，可以生產健康無病蟲害的扦插枝條，是扦插成功的必要條件；本試驗探討母樹在扦插前適當的處理方法，俾強化其枝條，以提高扦插的成功率。茶母樹以噴20,000ppm尿素等六種處理，分別在六月及八月間進行，每二個星期處理一次，連續處理三次後杆插，生長175天後調查其生育，發現青心烏龍六月噴益收之穴植管苗成活率為72%，八月噴益收者為80％皆較對照之96％為低。臺茶十二號茶苗之成活率各處裡間差異不顯著。二供試品種母樹六月或八月噴益收後，枝條上的花及蕾數顯著減少，腋芽長度則較其它處理為長。青心烏龍各處理中以六月及八月噴益收之穴植管苗生長最差，而以六月噴糖及八月噴尿素二處理的穴植管苗生長最好。臺茶十二號各處理以噴益收六月及八月處理之穴植管苗生長最差，其它各處理差異不顯著。 The healthy cuttings from a well growth of stock plants of tea (Camellia sinensis (L.) Kuntze) was the best way to improving survival and subsquent growth of tea cuttings. Six treatments included removing shoot tip, thinning flower by hands and spraying urea (20000ppm), glucose (20000ppm)and ethylene (395ppm) from June to August 1995. All the treatments were applied 3 times at 14-day intervals on 8-year-old cultivars of ‘Chin-shin Oolong’ and TTES No.12. Single-leaf cuttings were made from stems and stuck in dibbling tube. Growth date were recored 175 days after planting. Less survival rate of the cuttings, and fewer f lowers and longer lateral buds of the stock plants were observed in the ethylene treatment. In cv. Chin-shin Oolong, spraying urea or glucose apparently had best effects on subsequent growth of tea cuttings. In ethylene spray on TTES No. 12 cultivar, the subsequent growth of tea cuttings was the worst in all treatments.