食用美人蕉品種間農藝特性及澱粉含量之研究
Other Title
Studies on the Agronomic Characteristics and the Starch Contents of Two Edible Canna Varieties (Canna edulis Ker.)
Journal
中華農業研究
Journal Volume
32
Journal Issue
4
Pages
336-340
Date Issued
1983-12-04
Date
1983-12-04
Author(s)
胡敏夫
M.F. Hu
Abstract
本文目的在探究食用美人蕉品種之農藝特性及澱粉性質，發現紫紅色種之生長勢較綠色種為強，公頃塊莖產量亦較高，但差異不大。不同生長序之塊莖產量與全部塊莖產量之比，兩品種均以第3 及第4 分蘗所佔之百分率較高分別為27.5%與28.7%（紫紅色種），及23.8%與23.5%（綠色種）。塊莖澱粉含量亦以第2 至第4 分蘗之塊莖較高，各為65.3%、61%、64%（紫紅色種）及59.2%，64%、65%（綠色種），顯示促進該等分蘗塊莖數量及發育為提高食用美人蕉產量之重要關鍵。不同生育日數對塊莖澱粉含量經測定結果，得知塊莖澱粉蓄積量隨著生育日數而增加，但最適當之收獲時期，應在植株開始枯萎且新芽未萌發前為宜。自澱粉粒觀測發現，該兩品種之澱粉粒均比其他澱粉作物之澱粉粒為大，澱粉純度高，尤以綠色種為最，此或可解釋綠色種廣被農民栽培之理由。
A comparative study on yield and starch content of two edible canna varieties, namely, the green and the purple canna, was carried out in 1982. The results showed that the growth of the purple variety was more vigorous than that of the green one. The tuber hectare yield of th purple variety was also higher than that of the green one, but without significant difference.
Each canna plant usually produces five tuber-tillers. The ontogeny and weight of each tuber tiller were individually investigated. The third and the fourth tuber tillers were found to have the highest yield weight and averaged 27.5% and 28.7% of the total yield in the purple variety and 23.8% and 23.5% in the green variety, respectively. The starch content of each tuber tiller was also analysed, the second, third and fourth tuber tillers had higher starch content than the first or the fifth one. Therefore, the yields of the third and the fourth tuber tillers greatly influence the total production of edible canna.
Starch content at different growing stages in canna was also analysed. There was a positive correlation between the tuber starch content and the growth period. The highest starch content is obatined just before the plant is about to wilt. The observation of various starch granular indicated that the green canna had the largest granular size, and followed by the order of purple canna, potato, arrow root, sweet potato and cassava.
Publisher
農業試驗所
Type
journal article
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