Table 5 Pearson’s correlation coefficients of chemical composition with humates’ biological activity
Elemental analysis [at%] | FTIR relative peak intensity ratios | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
C | H | N | O | H/C | N/C | O/C | Aliph./Arom. | Arom./O– groups | Arom./Amid. | |
K[BW] Root division | -0.267 | -0.186 | 0.270 | 0.397 | 0.025 | 0.276 | 0.442 | 0.050 | -0.120 | 0.421 |
Growth increment | -0.114 | 0.381 | -0.285 | -0.282 | 0.310 | -0.281 | -0.212 | 0.527 | 0.240 | -0.197 |
Mass increment | 0.475 | 0.290 | -0.696 | -0.528 | -0.024 | -0.686 | -0.645 | 0.350 | 0.291 | -0.631 |
Sugar content | 0.391 | 0.044 | -0.399 | -0.247 | -0.150 | -0.389 | -0.359 | 0.364 | 0.064 | -0.323 |
Protein content | 0.181 | 0.214 | -0.183 | -0.398 | 0.040 | -0.180 | -0.398 | 0.168 | 0.248 | -0.377 |