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对三江平原地区影响大豆产量的主要气象因江气温、降雨量进行了分析。结果表明：该地区５～９月日平均气温低于历年平均值０．８℃时，即发生低温冷害，发生周期为３～５年，低温冷害年大豆减产率达２３．８％；自５０年代以来，该地区年降雨量逐渐减少，大豆需水关键期的７、８月份减少了近４０％，且分布不均，造成大豆力量的变幅增大。
The main meteorological factors influencing the soybean yield in the Sanjiang Plain were analyzed by the temperature and rainfall of the river. The results showed that when the average daily temperature from May to September was lower than the historical average of 0.8 ℃, the cold damage occurred in the period of 3-5 years and the yield reduction of soybean was 23.8% Since the beginning of the decade, annual rainfall in this area has gradually decreased. The key period of soybean water demand has decreased by nearly 40% in July and August, and the distribution is uneven. As a result, the variation of soybean power has increased.