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采用模型群的方法，对福建省龙海市种植结构的一些主要参数进行ＧＭ（１，１）模型预测，建立以时间为自变量的时变参数预测趋势方程，然后将参数趋势方程与多目标线性规划模型相联接，构造出预测型多目标线性规划模型群．结果表明：在当前增加蔬菜的种植面积能使综合效益提高；但到２０００年，由于人口增加、耕地面积减少，粮食和蔬菜需求压力加大．为保证粮菜供给，在种植结构上应增大粮食和蔬菜的种植面积，其他作物种植面积宜相应减少
The GM (1,1) model is used to predict some main parameters of planting structure in Longhai City, Fujian Province by using the method of model group. A time trend variable with time as an independent variable is used to predict the trend equation. Then, Linear programming model is connected to construct a predictive multi-objective linear programming model group. The results show that increasing the planting area of vegetables can increase the comprehensive benefits at present; but by 2000, as the population increases, the area of cultivated land decreases and the pressure on the demand for food and vegetables increases. In order to ensure the supply of foodstuffs, the planting area of grain and vegetables should be increased in the planting structure, and the planting area of other crops should be correspondingly reduced