为适应农村发展商品经济和调整种植业结构的需要,从黄县城关地处集镇、人多地少和肥水条件较好等特点出发,1984年在玉米制种地进行了间套复种蔬菜的试验。变传统的玉米制种地粮菜两作两收为三作三收、四作四收和五作五收,获得了玉米制种和蔬菜双丰收。其中三作三收,亩产玉米种355斤,父本玉米105斤,两茬蔬菜合计22,000 In order to meet the needs of developing rural economy and adjusting the structure of planting industry, from the point where the Huangxian Chengguan Town is located, the population is small and the conditions of fertilizer and water are good, the experiment on intercropping vegetables was carried out in 1984 . Change the traditional corn seedling food crops for two for two for three for three, four for four and five for five harvest, access to corn seed and vegetables double harvest. Of which three for three received three acres of corn yield per mu, 105 pounds of male parent corn, two stubble vegetables total 22,000