Table 3 Correlation analysis of endogenous protective enzymes, dry matter accumulation and yield of maize.
From: Comprehensive application of bio-char and nitrogen fertilizer in dry-land maize cultivation
Year | Index | SOD activity (U mg−1) | POD activity (μ g−1 min−1) | MDA Content (μmol g−1) | Dry matter in R1 (g plant−1) | Dry matter in R6 (g plant−1) | Yield (kg h−1 m−2) |
|---|---|---|---|---|---|---|---|
2019 | SOD activity (U mg−1) | 1 | |||||
POD activity (μ g−1 min−1) | 0.968** | 1 | |||||
MDA Content (μmol g−1) | 0.633** | 0.534** | 1 | ||||
Dry matter in R1 (g plant−1) | − 0.489* | − 0.379 ns | − 0.813** | 1 | |||
Dry matter in R6 (g plant−1) | − 0.613** | − 0.493* | − 0.919** | 0.953** | 1 | ||
Yield (kg h−1 m−2) | − 0.633** | − 0.535** | − 0.903** | 0.957** | 0.979** | 1 | |
2020 | SOD activity (U mg−1) | 1 | |||||
POD activity (μ g−1 min−1) | 0.987** | 1 | |||||
MDA Content (μmol g−1) | 0.568** | 0.513* | 1 | ||||
Dry matterin R1 (g plant−1) | − 0.461* | − 0.384 ns | − 0.853** | 1 | |||
Dry matter in R6 (g plant−1) | − 0.591** | − 0.519** | − 0.914** | 0.974** | 1 | ||
Yield (kg h−1 m−2) | − 0.654** | − 0.597** | − 0.888** | 0.950** | 0.979** | 1 |
