氣象因子對大豆種子發芽效應之模式化

Abstract

本文試驗以大豆(Glycine wax. L)品種高雄二號、高雄三號和高雄選十號為試材，進行連績月份的週年栽培，探討不同繁殖期的氣象因子對大豆種子發芽行為之影響。試驗結果顯示，高雄二號和三號的發芽百分比與累積日射量、累積氣温及累積雨量皆呈負相關(P<0.01)，高雄選十號發芽百分比與氣象因子之相關顯著程度較前兩者差，僅累積日射量及累積氣溫與發芽百分比之相關程度達顯著水準(P<0.05)。Weibull函數可適用於解釋大豆種子在不同栽植月份的發芽行為，並可進一步説明不同栽植月份對大豆種子發芽百分比所產生的效應。另以Richards函數來解釋並描述大豆種子胚根伸長趨勢時，曲線所預測的结果與 試驗資料很接近，顯示Richards函數之適用性極佳。 Field experiments were conducted at the experimental farm of Taiwan Agricultural Research Institute to study the effects of climatic factors during the growing periods on seed germination of soybean (Glycine max L.)，Kaohsiung No.2, Kaohsiung No.3 and Kaohsiung Selected 10. Results indicated a reduced germination in seeds produced from growing seasons of higher cumulative irradiance, precipitation, or both. Kaohsiung No.2 and 3 were more sensitive to climatic variations than Kaohsiung Selected 10 in that germination percentage was also decreased by the increasing of cumulative air temperature. It showed that germination behavior of soybean seeds from different planting months can be well-fitted in Weibull function, with unique set of parameters for each growing seasons. Patterns of radicle growth，on the other hand, were properly modeled by Richards function.