Effects of Nitrogen Fertilization on Yield and Quality of Wheat(Triticum aestivum Linn.) Cultivar Xikemai No.6

[Objective]The aim was to establish the cultivation technology of wheat cultivar Xikemai No. 6 playing excellent characteristics to achieve high yield and high efficiency. [Method]The phosphate and potash fertilization were fixed on the field level,then 10 kinds of nitrogen levels were designed to study the effects of nitrogen on yield and quality of Xikemai No. 6. [Result]Nitrogen had greater effects on leaf chlorophyll content,grain yield,grain crude protein content. Lower or higher nitrogen were not conducive to improve photosynthesis,dry matter accumulation and protein content. At various growth stages of wheat,the leaf chlorophyll content of every treatment were relatively high at the flowering stage and SPAD value were the biggest,210 kg/hm2-nitrogen treatment's SPAD value up to 60. 9 and the photosynthetic efficiency was strong. When the nitrogen fertilization was 210 kg/hm2,leaf SPAD value was bigger at heading stage,flowering stage and early grain filling stage,the grain yield was the highest by 8 237. 25 kg/hm2. When the nitrogen fertilization was 180 kg/hm2,the crude protein content of the grain was the highest by 1 271. 70 kg/hm2. So it was initially identified that the suitable nitrogen levels was 180-210 kg/hm2. By simulation analysis,the best relationship between nitrogen fertilization and grain yield was quadratic equation curve Y = 5 114. 487 + 21. 414X-0. 041X2,R2= 0. 880,and the theoretical yield was 9 721. 779 kg/hm2. The best fitting relationship between nitrogen fertilization and grain crude protein was also quadratic equation curve,Y = 12. 911 + 0. 021X-4. 578E-5X2,R2= 0. 906,the theoretical protein content was 16. 88%. [Conclusion]The study confirms on the best nitrogen fertilization of Xikemai No. 6,which is 180-210 kg/hm2,to obtain the goal of improving yield and protein content,then to provide a help for farmer promoting and utilizing Xikemai No. 6 better.