Effect of Different Seeding Time and Seeding Quantity on Yield of Different Genotypes Super Wheats

The experiment was conducted with three types super wheats,such as the large ear cultivars(01-35,8355),the middle ear cultivars[6200(8),4133-2] and the many ear cultivars(988044,02-48).A study was made on the variation of ears,grains per ear,weight per thousand grains and grain yields.A conclution of the best seeding time and seeding quantity of different genotypes wheats was made.The results showed that the optimal seeding time of the large ear cultivars was on 15th October,the optimal seeding time of the middle ear cultivars and the many ears cultivars was on 5th October.The influence of seeding time on the ears was more than 15% at most,but the in fluence of that on the grains per ear,weight per thousand grains and output were under 13%.The influences of different seeding quantity on all kinds of indexs were under 5%.The output of three genotypes wheats was more through middle high density.Impact of the seeding time on the output facters of super wheat was greater than that of seeding quantity.