Effects of different fertilization levels on yield and quality of greenhouse tomato.

【Objective】 Under different fertilizer levels,the yield and quality of tomato in solar greenhouse in spring were explored,which can provide a theoretical evidence for the reasonable fertilization index to ensure the high quality and high yield of tomato in greenhouse cultivation.【Method】 With tomato Jinpeng No.1 as experimental materials,taking local conventional fertilization as control treatment,setting 3 different fertilization levels(The fertilization amount T1 was carbamide 711.1 g,calcium superphosphate 1 511.1 g,potassium sulphate 462.2 g,cow dung 46.67 kg.The fertilization amount T2 was carbamide 1 066.7 g,calcium superphosphate 2 266.7 g,potassium sulphate 693.3 g,cow dung 70.00 kg.The fertilization amount T3 was carbamide 1 422.2 g,calcium superphosphate 3 022.2 g,potassium sulphate 924.3 g,cow dung 93.33 kg.The area was 4.68 m2 per plot.),the yield of tomato and the content of NO-3-N,soluble sugar,soluble solids,organic acids,lycopene and VC in the fruit of tomato were investigated.【Result】 The results showed that,compared with the control,the treatments of tomato yield were increased by 11.5%,43.4%,25.5%,where fruit weight,fruit number,area yield and yield per hm2 of T2 treatment were higher than those of T1 and T3 treatments.With the increase of fertilization,the content of NO-3-N,soluble sugar content,soluble solids content and the ratio of sugar to acid decreased,but lycopene and organic acid content showed an upward trend.【Conclusion】 Taking all the factors as a whole,T2 is the most suitable fertilizer.Therefore the recommended fertilization is N 1 182 kg,P2O5 655.5 kg,K2O 835.5 kg,cow dung 168.75 t per hm2.Under this condition,the highest yield and best quality of tomato can be obtained.