| Summary: | 碩士 === 國立臺灣大學 === 園藝暨景觀學系 === 107 === This study is maimly to investigate the effects of rootstock variety on the growth characteristics of Fortunella hindsii. Useing Fortunella hindsii to develop a fruit bonsai that can interact with people. At the same time, we study for the method of scion production and excellent rootstock reproduction, and also observe the precocious flowering of Fortunella hindsii seed seedlings and selecte outstanding new strains for bonsai produce. From multiple aspects to study the growth characteristics and uses of Fortunella hindsii.
This study used 12 varieties of stock, including sunki, citrange, citrumelo, trifoliate orange, lemon, sweet orange, grapefruit, pomelo, Hutou Gan, Honey Murcott, mandarin, and calamondin by grafting. For 9-cm bonsai prouce, we recommend firstly lemon, secondly double-plant grapefruit, thirdly grapefruit, and fourthly sweet orange. Lemon has few seeds, but can reproduce by cutting. For 15-cm bonsai prouce, we recommend firstly grapefruit, secondly sunki, thirdly citrange, and fourthly sweet orange. Sunki rootstocks are easily bought from market, but trees on them should be planted for 2 years. Pomelo and calamondin are suitable for large bonsais and garden trees produce. Hotou Gan can be applied to hedges, and being 22 cm stock is the best suited for Fortunella hindsii scion produce. Different rootstocks will effect the same strain of Fortunella hindsii on growth and shape. Just likes the Taiwanese proverb that “The right rootstock is more important than heavy fertilization.”(Taiwanese pronunciation is Hei Dang Bui Bu Zu Una Shin Tsang.)
Cutting rootstocks of lemon and citrange can make Fortunella hindsii flower and bear fruit, but they can not meet the product standards. Maybe the planting time of cutting stocks was not enough. It should be studied more deeply.
There are about 30% seed seedlings of Fotunella hindsii that showed precocious flowering in the first year. And there are about 60% seed seedlings of Fotunella hindsii that showed precocious flowering in the second year. They still bear fruit every years after the first flowering, and there are 41.7% precocious flowering seedlings can produce offsprings. At present we selected 7 outstanding new strains for bonsai improvement.
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