Tomato taste quality is largely determined by the contents
of soluble sugar and organic acid and their ratio (Dorais et al.,
2001). Compared to CI, APRI increased the soluble sugar content
of tomato fruits by 4.5%, but FPRI decreased it by 4.4%, but
no significant difference in soluble sugar content among three
irrigation treatments was observed under the same Ca level. Ca
spraying increased the soluble sugar content slightly and Ca3
level had the highest soluble sugar content under the same irrigation
method. Among 15 treatments, APRI and CI with Ca3
treatments had the highest soluble sugar content, with the value of
4.8%.