Abstract:

The suitable combination of sowing time and seedling density is favorable for the yield increase of wheat cultivar. A field experiment with split plot design was conducted to study the suitable sowing time and seedling density of a New Wheat Cultivar Yunong 202. The results showed that sowing time had a smaller effect on yield and yield components of Yunong 202, and that had a significant effect only on spike number. Seedling density had a greater effect on yield and yield components except for 1000-kernel weight, especially, had a higher significant effect on spike number and grain number per ear. In different sowing times, yield differed greatly and yield components differed little among the seedling densities. In different sowing times and seedling densities, spike number had the greatest direct effect on yield, the second was grain number per ear, and 1000-kernel weight had the smallest. The most suitable sowing period is from Oct. 8 to Oct. 25, and the suitable seedling density is 1200000 plants /hm2 in earlier sowing time and 2400000 plants/hm2 in middle or later sowing time.