- 期刊
- OpenAccess
臺農2號番木瓜接穗用側梢生產之研究
Studies on the Axillary Shoot Production for Scion of 'Tainung No. 2' Papaya
摘要
本研究針對番木瓜嫁接產業之需求，進行接穗生產之試驗。以臺農2號實生株分別進行除葉、倒株、溫度處理及配合植物生長調節劑的系列試驗。結果顯示：除葉處理會影響萌芽率及每節位的萌芽數；倒株處理不影響萌芽率；溫度處理會影響側梢長度、萌芽率及每節位的萌芽數，其中32℃及27℃的促進效果並無差異，但都顯著優於22℃處理者。另由不同濃度BA及GA3混合液處理盆栽幼株之結果得知，施用BA不影響側梢長度，而GA3雖會影響側梢長度，但使用200ppm與100ppm之效果相近；以萌芽率而言，施用BA或GA3皆具明顯效果，且與其所施用濃度無關；BA會影響每節的萌芽數，亦與其施用濃度無關，而GA3的施用濃度則有影響，以200ppm優於100ppm；GA3濃度會影響多芽的產生，且以200ppm優於100ppm。顯示BA200ppm與GA3200ppm是促進盆栽側梢生產的有效濃度組合。另由田間成株試驗則顯示BA200ppm+GA3 100ppm處理具有最佳之取穗倍數，因此為大量生產接穗，應於植株除葉後，再噴施BA200ppm與GA3 100ppm的混合液，可在45日內獲得每節位3.7枝的接穗量。
並列摘要
The objective of this study was to evaluate the performance of axillary shoot production for grafted papaya industry.In order to stimulate the multiplication and growth of axillary shoots of papaya, experiments of defoliation, sloping plant treatment, temperature treatments and applying plant growth regulators of different concentrations were conducted. Results showed that defoliation enhanced axillary bud sprouting; sloping plant treatment had normal level of axillary bud sprouting; temperature treatments affected the axillary bud sprouting percentage, the number of sprouting buds per node, and the length of lateral shoot. The stimulation effects had no significant difference between treatments of 32℃ and 27℃, yet both were better than 22℃ treatment.In the plant growth regulator experiments, BA treatment did not increase the length of lateral shoots, but GA3 did at 100 ppm and 200 ppm and both concentrations produced the same effect. Both BA and GA3 exerted their influence on bud sprouting percentage regardless of concentration. Application of GA3 200 ppm increased the number of sprouting buds per node and produced more favorable results than the GA3 100 ppm treatment did. GA3 also promoted multiple bud proliferation. Results of potted experiment was indicated that the treatment of BA 200 ppm plus GA3 200 ppm was the most favorable combination to stimulate the growth of lateral shoots. Practical field experiment on fully developed plants showed that BA 200 ppm plus GA3 100 ppm had the best bud sprouting percentage per node. In terms of mass production, spraying plants with BA 200 ppm plus GA3 100 ppm could produce an average of 3.7 scions per node in 45 days.