Effects of Different Nitrogen Fertilizer Application Rate on Yield and Economic Benefits of Eggplant

The effects of different nitrogen application rate on eggplant yield and economic benefit were studied through field experiment.The result showed that nitrogen fertilizer application significantly affected the yield of eggplant,the yield and the economic benefit are supreme when 12kg/667m2nitrogen fertilzier application rate was applied,then the yield decreased with the increase of nitrogen fertilizer application,and the input-output ratio decreased gradually with the increase of nitrogen fertilizer application.Regression statistical analysis showed that,the yield of eggplant is accord with the theory with the 12kg/667m2nitrogen fertilizer application rate,which has the largest economic recovery under the condition of nitrogen fertilizer application rate.