| Abstract: In order to reduce the amount of fertilizer and increase the fertilizer utilization rate, tomato was used as the test material to study the effect of different fertilization measures on the yield and quality of continuous planting tomato. The results showed that under the condition of no yield reduction, the optimized fertilization treatment had a significant effect on saving fertilizer. Compared with T1 treatment, T2, T3, T4 and T5 reduced 44.8, 44.8, 65.6, 3.2 kg of total nutrient per 667 m2, saving 47.0%, 47.0%, 68.8% and 3.4%, respectively, and T4 had the best effect on saving fertilizer. At the high soil fertility level, the reduction of topdressing amount by half could completely guarantee the nutrients needed by crops, among which T3 had the highest yield, which showed that on the basis of optimized fertilization, increasing topdressing times and a small amount but high frequency topdressing was more conducive to crop growth. T3 increased vitamin C content and decreased nitrate content of tomato. To sum up, the reduction of chemical fertilizer had no significant effect on the continuous tomato yield, but significantly improved the quality of tomato. The best treatment was to reduce the amount of chemical fertilizer by 50% combined with 40% organic fertilizer and properly increase the times of topdressing at fruiting stage (T3). |