acid concentrations decreased with Zn application,
being the highest for the control, intermediate for the
Zn-EDTA application, and the lowest for the ZnSO4
application. The mean value of the phytic acid content
of the two genotypes decreased from 2.78 mg/g for
the control to 2.24 mg/g by ZnSO4 and to 2.34 mg/g
by Zn-EDTA, and decreased overall by 24.1% and
18.8%, respectively. Genotype Jiaxing27 had a higher
phytic acid content than that of Nipponbare (Table 5).
There was a significant interaction between AWD
and ZnSO4 on the phytic acid content in the polished
rice, which had the lowest phytic acid content in
Nipponbare or Jiaxing27.
Both water-saving management and Zn fertilization
significantly reduced the molar ratio of phytic
acid to Zn in the polished rice (Table 5). Compared to
CF, the molar ratio of phytic acid to Zn was significantly
decreased by 25.8% under AWD treatment.
The molar ratio of phytic acid to Zn ranged from 11.9
in no Zn treatment to 8.9 by ZnSO4 application and to
9.4 by Zn-EDTA application, and decreased overall
by 33.7% and 26.6%, respectively. However, no significant
difference was observed in the molar ratio of
phytic acid to Zn between the two genotypes (Table 5).