Abstract:

The aim is to explore the effects of different formula fertilizations on the growth, quality and yield of tomato cultivated in facility substrate, aiming to screen out high-yield, high-quality and high-efficiency fertilization schemes. Taking large tomato ‘1437’ as the test variety, different concentrations of potassium fertilizer, sucrose and fish protein were added on the basis of the Dutch formula to fertilize tomatoes cultivated in facility substrate. The growth indexes and fruit quality indexes of tomato plants were measured, and the effects of different fertilization formulas on the quality and yield of tomatoes cultivated in facility substrate were comprehensively evaluated by membership function analysis. The results showed that after applying the formula (T9) with 50% increase in potassium fertilizer, sucrose and fish protein on the basis of the Dutch formula, the main root length of tomato plants increased by 75.84% compared with the application of the Dutch formula (CK treatment). The fresh weight and dry weight of the aboveground part of tomato plants treated with T₉ were significantly increased by 73% and 70.07% respectively compared with CK treatment. The fresh root weight and dry root weight of tomato treated with T₉ were significantly increased by 60.45% and 99.29% respectively compared with CK treatment. The soluble sugar content of tomato fruits treated with T9 was the highest, which was increased by 106.45% compared with CK treatment. The soluble solids of tomato treated with T9 were the highest, reaching 4.7%, which was significantly increased by 14.63% compared with CK treatment. The yield per plant of tomato treated with T9 was significantly increased by 38.96% compared with CK treatment. Thus, T9 treatment significantly promoted the growth and development of tomato plants, increased the material accumulation of tomato plants, improved the quality of tomato fruits and increased the yield of tomatoes.

Key words: potassium, sugar, fish protein, tomato, quality, yield