Abstract: The effects of drip irrigation with special fertilizers on maize plant height,stem diameter and yield were investigated.In the field experiment,Herve,AO Xiangxi,ammonium nitrate urea,liquid nitrogen fertilizer,no phosphate fertilizer treatment,and conventional fertilization as control,were studied for a total of 8 treatments.The results showed that the application of special fertilizers and compound enzymes in drip irrigation could increase the yield of maize,and the yield with ammonium nitrate urea was the highest,which was 770 kg/hm2 higher than that of the control.The plant height,stem diameter and 100-seed weight of maize were promoted by the special fertilizer and compound enzyme application.Among them,with ammonium nitrate urea,AO treatment maize plant growth is better,SPAD value is higher,100-grain weight,ear length,ear diameter and other economic characteristics of the survey values were higher,all of which were basically consistent with the yield results.With the exception of Herve,the other three kinds of special fertilizer and compound enzyme all increased the yield of maize.The net income increased from high to low for compound enzyme,ammonium nitrate urea,AO Xiangxi,and then liquid nitrogen fertilizer.It is concluded that ammonium nitrate urea and AO fertilizer can effectively promote maize growth,increase maize yield and increase the economic benefit of maize cultivation,and they are suitable for application as special fertilizers for drip irrigation under maize film in Hetao irrigation area.

Key words: Drip irrigation special fertilizers;Hetao irrigation area;Maize;Yield;Economic benefits