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題名 | 大豆光期試驗 (3)--短光期處理日數與誘致大豆開花之關係=Studies on Photoperiodism of Soybeans (3)--The Number of Photoperiodic Cycles Required for the Induction of Flowering of Soybeans |
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作者姓名(中文) | 施保華; | 書刊名 | 中華農學會報 |
卷期 | 53 民55.03 |
頁次 | 頁18-24 |
關鍵詞 | 大豆; 光期試驗; 短生期處理日數; 開花; |
語文 | 中文(Chinese) |
中文摘要 | 大豆品種百美豆及十石在分別接受1. 2. 4. 6. 8. 10. 12. 14. 16. 及20 個短日循環(美伊循環為 8 小時光期,16小時暗期)處理之後,對誘致開花、結莢及植株發育各方面所發生之主要影響,摘述如下: (一)百美豆最少需要6個短日方能誘致開花,十石在18小時之長光期下?使不接受任何短光期處理,仍可開花(表1、表2)。 (二)接受短日數目愈多,開花時期亦愈提早,百美豆如是,十石亦如是(表1、表2),足見對光期反應最遲鈍之品種如十石,其本質上仍屬於短日植物。 (三)百美豆及十石均有一共同趨向,?開花數量隨接受短日數目之增加而增加,且差異極為顯著(表1、表2)。 (四)百美豆最少須獲得12個連續短日,方能成功地結莢,而十石豆則僅需6個短日?可結莢。結莢數兩品種均隨短日數之增加而增加(表3)。 (五)百美豆具有明顯之開花臨界期(Critical flowering period)及結莢臨界期(Critical pod-setting period),前者在4至6個短日之間,後者在10至12個短日之間(圖1),十石在本試驗之處理範圍內,未表現開花臨界期,其結莢臨界期則在4至6個短日之間(圖2)。 (六)營養生長方面,百美豆受短光期處理後所發生之影響較大,莖高及節數等均隨短日數目之增加而遞減。十石所受影響則遠較百美豆者為小(表4)。 |
英文摘要 | Two soybean varieties were tested in this study. They were Palmetto(百美豆), a light-sensitive variety, and Shih-Ten (十石), a light-obtuse variety. Plants were grown under a long-day condition of 18 hrs. light: 6 hrs. dark cycle until the stage of 6 internodes, then treated with different number of short-day cycle (8 hrs. light: 16 hrs. dark) as follows; 1. 2. 4. 6. 8. 10. 12. 14. 16. and 20. After treatment, the plants were transferred back to long-day condition again. During the growing period of the plants, the vegetative growth, initial date of flowering, number of flowers and pods were recorded in order to determine the effect of number of short-day on photoperiodic induction. The results obtained may be summarized as follows: 1. The Palmetto, the light-sensitive variety, requires a minimum of 6 consecutive short-day cycles to induce flower formation. However, Shih-Tan, the light-insensitive variety , may form flowers even exposed in a continuous long-day condition.(Table 1 and 2). 2. It was observed that both Palmetto and Shih-Tan responded to the number of short-day treated: The more the number of short-day treated, the earlier the flower initiated. (Table 1 and 2). 3. Both of the two varieties tested have a similar tendency that the average number of flowers developed on each plant increases with the increase of the number of short-day cycles received. (Table 1 and 2). 4. Palmetto requires a minimum of 12 consecutive short-day cycles for pod formation; for Shih-Tan, however, only 6 short-day cycles required. The number of pods for both varieties increases with the increase of the number of short-day cycles treated (Table 3). 5. An apparent critical flowering period, between 4-6 short-day treatment, and a critical pod-setting period, between 10-12 short-day treatment were observed in Palmetto. However, the critical pod-setting period was between 4-6 short-day treatment, no critical flowering period was found in Chih-Tan. (Fig. 1 and 2). 6. The plant height, number of nodes and length of internodes decrease with the increase of number of short-day cycles. The effect of various number of short-day cycles on the vegetative growth of Palmetto was much more than that of Shih-Tan (Table 4). |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。