|Title:||利用Weibull函數分析温度對大豆種子發芽之效應||Other Titles:||Use of Weibull function to quantify temperature effect on soybean germination||Authors:||黃昭興
|Keywords:||Weibull函數;溫度;大豆;發芽模式;發芽最低溫度;Weibull function;Temperature;Soybean;Germination model;The lowest germination temperature||Issue Date:||15-Sep-1994||Publisher:||中華農藝學會||Journal Volume:||5||Journal Issue:||1||Start page/Pages:||25-34||Source:||中華農藝||Abstract:||
本文試驗以大豆品種高雄選十號(Glycine max L. cv. Kaohsiung sel. 10)為試材，在控制環境下探討5〜30°C溫度範圍内之大豆種子發芽行為，並試以Weibull函數分析溫度對大豆種子發芽之效應及解釋熱位時間(thermal time)與累積發芽百分比之關係◦根據試驗結果，大豆種子在10~30℃之間均能正常發芽，累積發芽百分比都高達90%以上。升高溫度可以縮短大豆種子發芽之遲滯期，至30°C時遲滯期反而延長，惟此一溫度之發芽速率最大。结果亦顯示，Weibull函數可準確的描述大豆種子族群在不同溫度下隨著時間進展的發芽表現，所賴以建立之大豆種子族群累積發芽百分比模式可據以說明溫度變化對大豆發芽的影響。同時，利用此模式可以很方便的估算出大豆種子在不同溫度環境欲達某特定發芽百分比所需之時間，亦可藉以輔助Garcia-Huidobro (1982)之種子發芽所需最低溫估算式而提高其估算值之準確性，並簡化其計算流程。本試驗因此估算出大豆種子發芽所需之最低溫度介於5〜5.5°C，且熱位時間與累積發芽百分比之間亦呈現Weibull函數關係。
Experiments were conducted in the controlled environment to study the effect of temperature in the range of 5-30°C on the germination behavior of soybean (Glycine max L. cv. Kaohsiung sel. 10). Weibull function was used to analyze temperature effect on soybean germination and to modeling the relationship between thermal time and cumulative germination. Results indicated that seeds of soybean germinated in a normal way from 10 to 30°C with a cumulative germination percentage above 90%. The lag phase in soybean was shortened by elevating temperature up to 25°C, but was prolonged at 30°C. The germination rate was increased with increasing temperature and reached the peak at 30°C. It appeared that Weibull function can adequately depict the germination process with time at different incubation temperatures. The established model using Weibull function clearly delineated temperature effect on cumulative germination and can be used to calculate the time period required for a certain germination percentage at different temperatures. With this model, the threshold temperature for seed germination in soybean can also be estimated correctly and can be adopted in improving the model of Garcia-Huidobro et al. (1982). As estimated, the threshold temperature was between 5 and 5.5°C, which was closed to the measured value of 6°C. Results demonstrated that the relationship between thermal time and cumulative germination was also a Weibull function.
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