Effect of different sowing date, planting density on yield and main agronomic traits in winter wheat variety Bainong 207

Abstract

Nowadays, the field is changed from «three parts planting, seven parts management» to «seven parts planting, three parts management», which requires good varieties with high adaptability and simplified and practical farming techniques to support modern agriculture.In our studies, we used the Bainong 207 winter wheat variety as the experimental material and had four sowing dates and four sowing density options for each sowing date. The influence of sowing dates and sowing density on yield, yield components and main agrotechnical features has been studied. According to the results of research, it was found that the influence of sowing dates and density on yield and the main components of yield differed significantly, with the influence of sowing time was greater than the influence of density. Yield, spike number and grain number per spike were highest in A2, and weight of thousands of grains - in A3; B2 and B3 had the highest yields, spike number and the grain number per spike increased and then decreased with increasing density, and the thousand grain weight gradually decreased. The setting percentage was higher at a certain date and density; there is no clear tendency of bulk weight with sowing date delay and increase density. The plant height gradually decreased with the sowing date delay , and increase with density. Spike length was a relatively stable feature with no significant changes with sowing dates and density. According to the results of research, the most appropriate terms of sowing of winter wheat of Bainong 207 variety have been established. Correlation analysis showed that high yields can be achieved by combining three yield factors with corresponding sowing dates and sowing densities.