Effects of Nitrogen Application on Grain Yield and Quality of Different Spike Types of Winter Wheat

To investigate the effects of different levels of nitrogen fertilizer on grain yield and quality of different spike types of winter wheat,large-spike wheat cultivar(shannong 9-1) and multi-spike cultivar(031085) were selected in this study.The results showed that(1) the relationship between grain yield and nitrogen fertilizer amount of winter wheat with different spike types was as follows:the wheat yield increased with the increase of N application under the lower level of nitrogen,while the wheat yield decreased with the increase of N application when the nitrogen amount reached to certain value;⑵ Quality characters of two different wheat cultivars had increased but Zeleny lowed under the higher level of nitrogen,and grain protein contention reduced under the retroposition nitrogen condition.⑶ To increase grain yield under different nitrogen applications,the main reason for large-spike wheat cultivar mainly was to raise grain heavy every spike,while for multi-spike wheat cultivar mainly was to raise the number of spikes.