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野生大豆是栽培大豆的近缘祖先种。中国野生大豆分布的广泛性,为了解和认识大豆在自然界中光温反应的规律提供了条件。利用29个纬度区自然生长的野生大豆主要生育阶段光温反应特点,明确了不同纬度区野生大豆在自然环境中出苗温度为13.1～14.7℃,开花期温度为20.5～26.5℃,成熟期温度为10～19℃;初花期临界光照时数为13.25～16.67h。出苗越早的低纬度区野生大豆开花和成熟期越晚,而出苗越晚的高纬度区野生大豆开花和成熟期越早。
Wild soybeans are the ancestral species of cultivated soybean. The wide distribution of wild soybean in China provides the conditions for understanding and understanding the laws of light and temperature response of soybean in nature. Based on the characteristics of light and temperature during the main growth stages of wild soybean grown in 29 latitudes, it was found that the emergence temperature of wild soybean in different latitudes was 13.1-14.7 ℃ in natural environment, 20.5-26.5 ℃ in flowering stage, 10 ~ 19 ℃; the initial bloom of the critical light hours is 13.25 ~ 16.67h. The earlier the late emergence, the later the flowering and maturity stages of wild soybean in low latitudes, the later the emergence and emergence of wild soybean in the high latitudes.