Effect of intercropping of corn with chicory at different densities

By using quadratic saturation D optimum design, the test on the intercropping of corn with chicory at different densities was carried out. The regression models for predicting the corn grain yield and chicory fresh yield with corn and chicory densities were set up. Based on analyze of the models, the corn grain yield could reach 599 3.69 kg/hm2 when corn and chicory densities were 229 66 plants/hm2 and 111 851 plants/hm2 respectively. The chicory fresh yield could reach 106 014.51 kg/hm2 while chicory density was 258 834.3 plants/hm2 and the corn density negatively affected the chicory fresh yield. Take corn grain yield growing in step with chicory fresh production as target ，we optimality selected Regression models，we put forward 8 sets of corn, chicory coproduction technical proposal：corn grain yield is 5 475 kg/hm2,chicory fresh production is 82 500 kg/hm2,corn density is 43 446～50 499 stems/hm2,chicory 105 713～204 158 stems/hm2.