Nanomaterials have multiple potentials and applications,with special properties due to their size of less than 100 nm,and have a greater potential for agricultural applications in recent years.In this study,the effect of 1、10、20、30、40 mg·L-1 5 different concentrations of manganese ferrite nanomaterials(MnFe2O4 NMs)on the quality and yield of tomato fruits was investigated by foliar spraying using a small-fruited tomato inbred line'6648'as test material.MnFe2O4 NMs were sprayed for four consecutive days 30 days after tomato planting(one week before flowering),and an equal amount of deionized water was sprayed as a control.The results showed that foliar spraying of MnFe2O4 NMs had a significant effect on improving the growth potential of tomato plants,and also induced a significant effect on the accumulation of biomass;at the same time,it could increase the content of soluble sugar,lycopene,VC,and the sugar-acid ratio content of tomato fruits,which further improved the quality of tomato fruits;and it also had a significant effect on the increase of the yield of tomato fruits.The results of the study also showed that at low concentrations of MnFe2O4 NMs(1-10 mg·L-1),the growth of tomato plants was significantly promoted,and the effect was not significant or even negative at higher concentrations.The total tomato yield increased by 12.7％with the application of 1 mg·L-1 MnFe2O4 NMs.Also analyzed by polynomial fitting,the concentration of MnFe2O4 NMs in the range of 4.01-7.25 mg·L-1 was found to be more effective in improving the growth and quality of tomato.This study provides some reference for the application of nanomaterials on tomato.
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