Abstract In order to investigate the relationship between nutrient solution concentration and tomato fruit
comprehensive qualty under substrate cultivation condition in solar greenhouse，this paper took‘Fentailang’as test
material；set up 4 treatments including conventional nutrient solution concentration（CK），130% of the nutrient solution
concentration of the CK（T1），150% of the nutrient solution concentration of the CK（T2）and 200% nutrient solution
concentration of the CK（T3）；and studied the effects of different nutrient solution concentrations on 12 quality indexes
of tomato fruit．The results showed that along with the increase of nutrient solution concentration，the single tomato fresh
fruit weight and dry weight，fruit shape index，fruit hardness，sugar-acid ratio，soluble solids content，VC content and
soluble protein content of tomato fruits showed a changing tendency of first increasing then decreasing．The soluble sugar
content and nitrate content showed a linear increasing tendency．The paper carried out comprehensive evaluation using
principal component analysis and obtained the synthesis score as T2 ＞ T1 ＞ T3 ＞ CK．The comprehensive quality of
tomato fruit was the best when treated with 150% of the conventional nutrient solution concentration．
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Received: 29 June 2021
Published: 25 August 2021
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