Table 2.
Effect of planting density on PAR light intensity, leaf area index and leaf chlorophyll content (pooled data for 2015–16 to 2019–20).
| Treatments | PPDF reading in open sunlight and below the plant canopy in different directions (µ mole−1 m2 s−1) | Chlorophyll content fluorometer readings | Leaf area index | ||||
|---|---|---|---|---|---|---|---|
| East | West | North | South | Mean | |||
| Control | 160.2 (17.1a) | 173.6 (18.6a) | 174.5 (23.3a) | 136.9 (16.2a) | 161.29 (31.15a) | 0.70a,b | 1.28a,b |
| HDP-1 | 120.2 (13.8b) | 129.3 (14.7b) | 105.6 (13.6b) | 82.5 (10.2c) | 109.39 (21.65b) | 0.71a | 1.35a |
| HDP-2 | 101.4 (11.1c) | 110.4 (12.1c) | 108.5 (13.7b) | 107.6 (13.1b) | 106.97 (20.60b) | 0.70a,b | 1.11c |
| UHDP-1 | 101.1 (11.8c) | 96.3 (11.1c,d) | 78.2 (10.4c) | 77.3 (9.8c) | 88.20 (17.71c) | 0.71a | 1.16b,c |
| UHDP-2 | 97.0 (10.5c) | 97.8 (9.7d) | 96.3 (12.3b) | 99.3 (12.4b) | 97.58 (18.58c) | 0.70b | 1.09c |
Avg. PPDF reading in open sunlight was 1250 µ mole−1 m2 s−1.
Figures under parenthesis are transformed values.
Means with at least one letter common are not statistically significant using TUKEY's Honest Significant Difference at 5%
Control: Planting at 6 m (row to row) × 6 m (plant to plant) spacing (tree density—277 plants ha−1), HDP-1: Planting at 6 m (row to row) × 3 m (plant to plant) spacing (tree density—555 plants ha−1), HDP-2: Planting at 4 m (row to row) × 4 m (plant to plant) spacing (tree density—625 plants ha−1), UHDP-1: Planting at 4 m (row to row) × 2 m (plant to plant) spacing (tree density—1250 plants ha−1), UHDP-2: Planting at 2 m (row to row) × 2 m (plant to plant) spacing (tree density—2500 plants ha−1).