Effect of Nitrogen Application on Yield,Quality and Nitrogen Use Efficiency of Silage Maize in the Cool Zone of Xing'an League
[Objective]To investigate the response of yield,quality and nitrogen fertilizer utilization of silage maize to different nitrogen appli-cation rate in the cool zone of Xing'an League.[Method]Using silage maize"Jinling 17"as the test material,different amounts of nitrogen application(0,100,200 and 300 kg/hm2)were set.The silage maize was harvested during the period of milky maturity.The indicators of plant height,yield and quality were determined,and nitrogen fertilizer utilization rate were calculated.[Result]With increasing nitrogen ap-plication,the plant height,yield and crude protein content of silage maize increased and nitrogen partial factor productivity gradually de-creased.The above indexes were 334.40 cm,23 522.36 kg/hm2,6.51% and 117.61 when nitrogen rate was 200 kg/hm2,and the above in-dexes were 341.80 cm,24 908.68 kg/hm2,7.81% and 83.03 when nitrogen rate was 300 kg/hm2,respectively.[Conclusion]Considering the yield,quality and nitrogen use efficiency of silage maize,the recommended nitrogen application rate was 200 kg/hm2.
万方数据
维普
