Abstract:

Field experiment was carried out to study the effects of different 4 organic fertilization rate on yield, quality and nitrogen utilization of tomato in the Bejing suburb. The 4 treatments were JF0, JF1, JF2 and JF3 with the chicken manure application rate being 0, 52.5, 105, 210 kg/hm2 respectively. Results showed that there was no significant difference on plant height and chlorophyll contrast with 4 treatments. The yield of JF1 and JF2 treatments were significantly increased by 6.0%-6.9% compared with JF0 and JF4 treatments; The nitrogen use efficiency of JF1, JF2 and JF3 were 4.39%, 1.55% and 0.33% respectively, and the nitrogen agronomic efficiency were 9.52 kg/kg, 4.49 kg/kg and -0.19 kg/kg correspondingly. Nitrogen distribution proportion in fruit of JF1 was significantly higher than other fertilizer treatments. The content of Vc, soluble sugar and total acidity of early fruits were increased by 49.3%-70.8%, 36.5%-46.0% and 35.1%-68.3% compared with full fruits, while the content of nitrate was decreased by 64.3%-78.6% correspondingly. Therefore, low fertilization with 52.5 t/hm2 can not only get high yield, but also improve nitrogen use efficiency.