| By means of membrane double ditch technology pattern, an experiment of different densities in six dense resistance types of maize hybrids was carried out to study the relationship between production and its character and the plant density. Within the scope of density in this paper, the production of maize increased with the increase of density. When the density reaches to a certain extent, the production decreased with the increase of density instead, and both present a conic model Y=-6417.314+5501.842X-396.330X2. The result shows that the optimum density of the six dense resistant types of maize hybrids in membrane doubles ditch technology pattern is 6.941×104 strain·hm-2. Under this density, each plant trait indicators are: grain number per spike is 499.9 kernels, 100-grain weight is 38.63 g, the rate of seed is 83.71%, the length of ear is 17.5 cm, the height of plant is 194 cm, the diameter of stem is 2.14 cm and the length of bald head is 1cm. It presents a positive correlation between plant height and density, the function curve is power law model Y=140.607X0.16602. There is a negative correlation between density and the four traits of grain numbers per spike, the diameter of the grain, the diameter of stem and the rate of seed, its function model are all cubic curve in which the trait indicators decreased with the increase of density. It presents a conic model between density and the length of bald head, the length of ear and 100-grain weight. There is a positive correlation between density and bald head, and a negative correlation between the length of ear and 100-grain weight. The length of bald head increased with the increase of density. The length of ear and 100-grain weight presents a unilateral decline trend. The test also showed that there is no significant correlation between ear height and density. |