Effects of Slow-Release Urea Combined with Ordinary Urea on Yield and Nitrogen Use Efficiency of Processing Tomato

【Objective】 In order to solve the problem of low fertilizer utilization rate of processing tomatoes in China, the fertilizer proportion suitable for the improvement of yield, quality and nitrogen absorption and utilization of processing tomatoes in Xinjiang was screened out. 【Method】 The effects of different ratios of common urea and slow-release urea on dry matter accumulation, yield, nitrogen accumulation and nitrogen use efficiency of processed tomato were studied with 9 treatments and no nitrogen application as the control. 【Result】 The results showed that compared with non-N application, N application significantly increased dry matter accumulation, yield and nitrogen utilization rate of processing tomatoes. 70% slow-release urea + 30% common urea had the best effect at 100% equal nitrogen level, and 60% slow-release urea + 20% common urea had the best effect at 80% equal nitrogen level at flowering stage and 20% common urea had the best effect at fruit stage, and 80% equal nitrogen level was better than 100% equal nitrogen. 【Conclusion】 Under the experimental conditions, 60% slow-release urea + 20% ordinary urea topdressing at flowering stage + 20% ordinary urea topdressing at fruit stage with 80% equal nitrogen content had the best effect, which could not only increase the yield of processed tomato, but also realize the efficient utilization of nitrogen.