Effect of Corn Straw Returned to Field with Different Maturing Agents on Nitrogen Utilization and Yield of Wheat
In order to investigate the effect of different composting agents on nitrogen utilization and yield of winter wheat under corn straw re-turning to the field,a field experiment was conducted in Nizhuang Village,Huangheya Town,Decheng District,Dezhou City. The experiment used corn straw returning to the field without composting agents as a control (CK) before sowing winter wheat,and corn straw returning to the field was treated with 6 different composting agents,the effects of different composting agents on the growth,nitrogen utilization,and yield of winter wheat after returning corn straw to the field were studied. The results indicated that the nitrogen accumulation and transport capacity of nutrient organs in the flowering and mature stages of T1,T4,and T7 treatments were superior to other treatments. In addition,the contribution rates of nitrogen to grain nitrogen after flowering in T1,T4,and T7 treatments were 19.45％,16.92％ and 17.32％ higher than those in CK treatment,respectively;the four indicators of grain yield,nitrogen absorption efficiency,nitrogen utilization efficiency,and nitrogen fertilizer partial productivity in T1,T4,and T7 treatments were all higher than those in other treatments. The differences between these four indicators and other treatments were significant,and the nitrogen harvest index was 17.39％,20.27％ and 15.94％ higher than CK,respectively. Finally,higher nitrogen absorption and utilization contributed to the improvement of wheat growth and grain yield. The grain yield of T1 (8215.91 kg/hm2),T7(8102.02 kg/hm2) and T4(8060.63 kg/hm2) treatments was 15.35％,13.17％ and 13.75％ higher than CK,re-spectively. It can be seen that returning corn straw to the field with the application of composting agents can significantly improve crop yield and benefits,with T1,T4,and T7 being the best treatments. This study provides a technical reference for promoting nitrogen utilization and sta-ble and high yield of wheat after the full return of corn straw to the field in the winter wheat corn rotation area of northern Shandong,and pro-vides fuel for the smooth completion of the"ton half grain"project in Dezhou City.
Returning straw to the fieldMaturing agentNitrogen utilizationYield
万方数据
维普
