Effects of irrigation and fertilization treatments on transfer and utilization of water and nitrogen in maize root zone

To study the effects of placement of water and nitrogen on transport and utilization of water and nitrogen in maize root zone. Experimental treatment have fertilizing in the irrigated furrow (FII) and unirrigated furrow (FIU). The results show that there have a higher residual NO3--N contents in treatments of low irrigation water of FII and high irrigation water of FIU. The treatments of high water of FII is more easily lead NO3--N leaching. The treatment of high nitrogen and low water of FIU has the maximum grain yield of 9953 kg/hm2 and the highest grain irrigation water use efficiency (IWUE) of 6.70 kg/m3. Compared with the IWUE of the treatment of high nitrogen and high water of FII, it raises by 72.68%. The IWUE of the treatment of high water is lower than that of low water. The nitrogen accumulation of the treatments of high nitrogen is more than that of low nitrogen, which is positively correlated with nitrogen applied. The nitrogen accumulation of the treatment of high nitrogen and low water of FIU is the largest, while the treatment of low nitrogen and high water of FII is the least. The best form of water and nitrogen treatment is the treatment of high nitrogen and low water of FIU.