Indicator | Principal components | |||
---|---|---|---|---|
1 | 2 | 3 | 4 | |
Organic carbon | 0.060 | −0.388 | 0.903 | −0.033 |
Total nitrogen | −0.120 | 0.945 | −0.177 | −0.216 |
Total phosphorus | −0.902 | 0.339 | −0.169 | −0.139 |
Total potassium | 0.225 | 0.561 | 0.703 | 0.077 |
Soluble sugars | 0.523 | −0.460 | 0.354 | −0.560 |
Starch | 0.021 | −0.093 | 0.164 | 0.897 |
Lignin | −0.014 | 0.994 | 0.064 | 0.058 |
Cellulose | 0.823 | 0.263 | 0.014 | 0.443 |
Hemicellulose | 0.808 | 0.084 | 0.225 | −0.450 |
Total phenol | 0.488 | 0.174 | 0.636 | 0.381 |
Tannins | 0.308 | 0.666 | 0.436 | 0.402 |
Lignin/nitrogen ratio | 0.080 | 0.920 | 0.217 | 0.281 |
Lignin/phosphorus ratio | 0.869 | 0.448 | 0.156 | 0.065 |
Nitrogen/phosphorus ratio | 0.970 | 0.024 | 0.051 | −0.088 |
Carbon/nitrogen ratio | 0.106 | −0.906 | 0.363 | 0.160 |
Carbon/phosphorus ratio | 0.920 | −0.318 | 0.152 | −0.026 |
Eigenvalue | 6.132 | 5.276 | 2.168 | 1.421 |
Variance contribution (%) | 33.626 | 32.495 | 15.003 | 12.606 |
Total cumulative (%) | 33.626 | 66.121 | 81.125 | 93.731 |