Fig 1.
Record of temperature and relative humidity in the laboratory during the experimental period from November 2018 to November 2019.
Fig 2.
Rapid viscosity analyzer profile of milled rice flour.
Fig 3.
The changes in the content of chemical components in rice under storage, following the different nitrogen application rates.
CK, control group (0 kg N/ha); IN, insufficient nitrogen (160 kg N/ha); AN, adequate nitrogen (260 kg N/ha); EN, excessive nitrogen (420 kg N/ha). Data (mean ± standard deviation, n = 9) with different letters are significantly different (p < 0.05). For each parameter in the inset table, different lowercase letters in the same rows differ significantly as a function of storage time (Duncan’s test; p < 0.05). Different uppercase letters in the column denote significant differences as a function of nitrogen application rates (p < 0.05).
Fig 4.
The changes in the eating quality of rice during storage, following the different nitrogen application rates.
CK, control group (0 kg N/ha); IN, insufficient nitrogen (160 kg N/ha); AN, adequate nitrogen (260 kg N/ha); EN, excessive nitrogen (420 kg N/ha). For each parameter, the mean ± standard deviation (n = 3) followed by different lowercase letters in the same rows differ significantly as a function of storage time (Duncan’s test; p < 0.05). Different uppercase letters in the column denote significant differences as a function of different nitrogen application rates (p < 0.05).
Fig 5.
Changes in the cooking quality of rice during storage, after the different nitrogen application rates.
CK, control group (0 kg N/ha); IN, insufficient nitrogen (160 kg N/ha); AN, adequate nitrogen (260 kg N/ha); EN, excessive nitrogen (420 kg N/ha). For each parameter, the mean ± standard deviation (n = 3) followed by different lowercase letters in the same rows differ significantly as a function of storage time (Duncan’s test; p < 0.05). Different uppercase letters in the column denote significant differences as a function of different nitrogen application rates (p < 0.05).
Fig 6.
The changes in pasting characteristics of rice during storage, after different nitrogen application rates.
CK, control group (0 kg N/ha); IN, insufficient nitrogen (160 kg N/ha); AN, adequate nitrogen (260 kg N/ha); EN, excessive nitrogen (420 kg N/ha). Data (mean ± standard deviation, n = 9) with different letters are significantly different (p < 0.05). For each parameter, different lowercase letters in the same rows differ significantly as a function of storage time. Different uppercase letters in the column denote significant differences as a function of different nitrogen application rates.
Table 1.
Correlation analysis between taste quality indices and chemical composition changes of rice during storage, following different nitrogen application rates.