The Influence Of Different Seeding Time And Planting Density On Corn Yield

Maize is a major crop in MiYun area. With a batch of new maize varieties were expanded gradually in miyun area, explore new potential yield, is urgent and necessary. This experiment choose above the varieties with larger area Beijing 101 families,968,96 and cluster technology limited agriculture China as the experimental material, using two-factor repeated trials, five seeding time and three planting density, repeat 3 times each processing. Seeding time respectively on April 20, on April 30, May 10, ay 20 and 30 May, planting density of 4000 plants/667 m2; plant density of 4000 plants/4000 m2 respectively, and 4500 seedlings/667/667 m2 and 5000 m2. Test process between the various different kinds of growth period, the determination of the change of main agronomic traits and yield factors, through the analysis of seeding time and planting density on yield factors and the influence of agronomic traits, explore the varieties tested in miyun area suitable seeding time and planting density, in order to rationally utilize the light of the existing conditions of temperature, in order to further raise the production potential of existing varieties. The results are as follows:1. Under different seeding time, testing varieties of plant height under five different seeding time have certain differences, on May 10, sowing empty stalk rate was 2.67%, the lowest empty stalk rate differences between varieties is not obvious. Under different planting density, density of plant height is highest under 5000 plants/mu, in three varieties under different sowing density difference is not obvious; Ear position height difference between different density and variety; Empty stalk rate at different density difference obvious, in 5000 plants/667 m2 empty stalk sowing rate was as high as 3.83%.2. Under different seeding time, ear ear length difference under five different seedtime, ear rows each seeding time and there is not much difference between varieties; Seed yield at different seeding time have certain differences, May 30, sow the seed rate was 75.3%, the lowest empty stalk rate differences between varieties is not obvious. Under the different density, grain ear length no obvious difference in different seedtime, ear rows and seed yield under different density difference.3. Significant differences of different seeding time in production, of which May 10 best sowing, yield of 727.51 kg, seed production on May 30 min.576.46 kg; No obvious differences in terms of variety yield, yield the highest for the cluster technology limited,96,652.678 kilograms per mu yield the lowest for jingke 968,642.9 kg per mu. Three different planting density on yield differences, of which 4000 plants per mu best, yield of 729.197 kilograms,5000 plants/area yield a minimum of 615.247 kg,No obvious differences in terms of the varieties of production.4. According to the test result analysis, Beijing 968, cluster technology limited in 96 and 101 farmers in China the best seeding time in late April to early may, planting density in 4000 plants per mu. Advocated in early sowing to guarantee the normal birth, when fully mature harvest to obtain high yield, ensure the quality.