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上海郊区油菜单产高而不稳,年份之间波动很大。本文根据上海市农科院1959—1981年油菜产量资料,来剖析上海郊区油菜生产的环境条件,找出影响上海郊区油菜生产力的主要因子为:温度、光照、降水量、病害、倒伏。各因子在油菜不同生育阶段贡献效应不同,根据各因子的贡献量确定因子指数,建立油菜生产力模式:
Shanghai suburbs rapeseed production is high and unstable, fluctuating between years. Based on the data of rapeseed production of Shanghai Academy of Agricultural Sciences from 1959 to 1981, this paper analyzes the environmental conditions of rapeseed production in Shanghai suburbs and finds out the main factors that affect rape productivity in Shanghai suburbs are temperature, light, precipitation, disease and lodging. The contribution of each factor in rape at different stages of growth is different, according to the contribution of each factor to determine the factor index, the establishment of rape productivity model: