In order to explore effects of supply amounts and frequencies of nutrient solution on growth and fruit quality of highly sugary tomato,two factors of supply amount and frequency were considered in the experiment.Supply amount was 150 mL per plant (W1),210 mL per plant (W2),270 mL per plant (W3) and supply frequency was 1 times everyday (T1),2 times everyday (T2),3 times everyday (T3) in the growth period.During the flowering period,the amount of nutrient solution was doubled.The results showed that the fruit quality of tomato decreased with the increase of the supply amount,the mass fraction of soluble sugar and organic acid in the treatment of W2 and W1 was significantly higher than W3.The mass fraction of vitamin C and soluble solid in T3 treatment was higher than that in T1 and T2.The mass fraction of soluble solid of W1T3 and W2T3 treatments were 8.37％ and 8.33％,respectively.Compared with W1T1,the value of plant height,stem diameter and photosynthetic rate in W2T3 was the best and increased by 30.6％,26％,68.9％ respectively;when the frequency of nutrition solution was T3,the yield,fruit mass,and per plant of W2T3 treatment was the largest,and compared with W3T3,yield increased by 11.3％.However,the water use efficiencies of W1 and W2 were significantly higher than W3;therefore,W2T3 was the best option for improving growth and fruit quality of highly sugary tomato,which the supply amount was 210 mL per plant in the vegetative growth period and 420 mL per plant in the flowering period,while the supply frequency was 3 times every day.%为探索营养液供液量及供液频率对高糖度番茄生长、产量及品质的影响,设计营养生长期每株每天供液量为150 mL(W1)、210 mL(W2)、270 mL(W3),开花结果期加倍,供液频率为1次(T1)、2次(T2)、3次(T3).结果表明:高糖度番茄果实品质随营养液供液量的增加而降低,供液量为W1、W2处理的可溶性总糖质量分数、有机酸质量摩尔浓度显著高于W3处理.维生素C、可溶性固形物质量分数表现为T3处理高于T1、T2,W1T3、W2T3处理的可溶性固形物质量分数分别达到8.37％、8.33％;W2T3处理的株高、茎粗和光合速率最大,与W1T1相比分别提高30.6％、26％、68.9％;供液频率为T3处理时,W2T3处理的产量、单果质量、单株结果数最大,与W3T3处理相比,产量提高11.3％,而W1、W2处理的水分利用效率显著高于W3.综合分析,W2T3处理最佳,即番茄在营养生长期每株每天营养液供液量为210 mL,在开花结果期供液量加倍,每天供液3次,有利于促进高糖度番茄的生长,提高果实品质.
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