大豆生态研究──ⅩⅣ．复式光温综合作用与野生大豆栽培大豆开花期生育指标的研究

STUDIES ON SOYBEAN ECOLOGY ⅩⅣ.DOUBLE COMPRCHCNSIVC EFFCCT OF LIGHT AND TEMPERATURE AND THE INDEX OF GROWTH AND DEVELOPMENT OF WILD AND CULTIVATED SOYBEAN DURING FLOWERING PERIOD

根据复式光温综合作用基本原理和野生大豆、栽培大豆叶片感光效应规律，研究代表性纬度大豆在不同光周期、开花期生育指标变化规律。８小时光周期纬度间开花期生育指标差最小、栽培大豆均比同纬度野生大豆晚开花，确定为典型短光。１６．５小时光周期纬度间开花期生育指标差最大，栽培大豆均比同纬度野生大豆早开花，确定为典型长光。讨论确定４０°Ｎ至３５°Ｎ地带自然光温综合作用是栽培大豆起源的主要依据［６］，讨论确定野生大豆感光效应敏感，栽培大豆对温度适应性强的依据。

According to the basic principle of double comprehensive effect of light and temperature and the rule of the sensitive effect of wild and cultivated soybean,we studied the changes of the index of growth and development of soybean from representative latitude during flowering period under different photperiod.The minimum difference of index of growth and development was found under 8-hour-photoperiod,the cultivated soybean flowered later than the wild soybean of same latitude.The maximum difference of index of growth and development was found under 16.5-hour-photoperiod,the cultivated soybean flowered carlier than the wild soybean of same latitude.We discussed and defined that the natural comprchensive effect of light and temperature of the region from 40°N to 35°N is the main support of evolution of cultivated soybean;that wild soybean is sensitive to photoperiod,cultivated soybean is of strong adaptability to temperature.