The Effect of New-Type Urea on Yield and Nitrogen Utilization of Processing Tomato

【Objective】 To select suitable new type urea for drip irrigated processing tomato in calcare- ous soil, the biomass, nitrogen (N)uptake and utilization, yield and economic benefit of processing tomato were compared. 【Methods】 Two-year field trials were conducted with seven treatments including no N fertilizer (CK), common urea (Urea), polyaspartic acid urea (P-Urea), Humic humic acid urea (H-Urea), Zinc urea (Zn-Urea), loss- controlled urea (LC-Urea), common urea add Zn (Urea+Zn). The amount of NPK in each treatment was the same. In addition to all basal application of loss- controlled urea (LC-Urea), 30% of other urea was used as base fertilizer and 70% was applied with drip irrigation at the later stage. All P, K, and Zn fertilizers were applied as base fertilizer before transplanting. The biomass, yield and nitrogen uptake efficiency of processing tomato were measured at the mature stage. 【Results】 Compared with the common urea, the yields of new-type urea increased by 5.26%-11.37%, and dry matter increased by 1.85%-19.26%. Compared with common urea, humic acid urea significantly increased the shoot dry matter and the yield of processing tomato by 17.95% and 10.31%. Application of the new type urea also increased N average utilization rates by more than 4 percent. Humic acid urea N utilization rates increased by 9.72 percent. At the same time, the benefit of processing tomato was increased by applying new type urea, among which humic acid urea had the highest yield, and compared with the common urea, the income increased 2 975 yuan/hm². 【Conclusions】 The humic acid urea in the new types urea is the most effective way to improve the nitrogen fertilizer utilization efficiency and increase the benefit of processing tomato in Xinjiang.