Table 3.
Results of univariate tests performed to compare levels of chemical elements (n = 24) in two beehive products collected over two years from the same area: bee pollen and propolis. Bold text indicates a statistically significant difference with a p-value below 0.05.
| Element | Pollen 2018 vs. 2019 |
Propolis 2018 vs. 2019 |
Pollen vs. Propolis |
|---|---|---|---|
| p Value | |||
| Ag | 0.21856 | NA * | 0.00508 |
| Al | 0.72650 | 0.02142 | 0.00015 |
| As | 0.65361 | 0.10144 | 0.00169 |
| Ba | 0.97911 | 0.02194 | 0.00430 |
| C | 0.96446 | 0.14470 | 0.01307 |
| Cd | 0.93551 | 0.18140 | 0.81018 |
| Co | 0.34784 | 0.16963 | 0.00537 |
| Cr | 0.56601 | 0.01054 | 0.00508 |
| Cu | 0.46925 | 0.89808 | 0.00824 |
| Fe | 0.83994 | 0.01289 | 0.00423 |
| K | 0.72807 | 0.55699 | 0.00508 |
| Mg | 0.93016 | 0.49600 | 0.00508 |
| Mn | 0.31806 | 0.68966 | 0.00508 |
| Mo | 0.56704 | 0.38378 | 0.00144 |
| Na | 0.63668 | 0.15094 | 0.51126 |
| Ni | 0.58672 | 0.09351 | 0.13817 |
| P | 0.76675 | 0.24152 | 0.00508 |
| Pb | 0.81004 | 0.05422 | 0.00123 |
| S | 0.93433 | 0.36214 | 0.00508 |
| Sb | 0.82629 | 0.02728 | 0.00003 |
| Se | 1.00000 | 0.23406 | 0.92881 |
| Si | 0.63166 | 0.00493 | 0.00052 |
| V | 0.95890 | 0.06677 | 0.00133 |
| Zn | 0.62719 | 0.81490 | 0.00021 |
* NA—no statistical tests were performed because Ag concentration was determined only in one sample per year.