Open Access
Table 2
Mid-morning microclimate of typical summer days, in ‘late covered’ vineyard cv. Italia, according to the type of plastic cover.
| Parameter | Mid-August | Mid-Se | ptember | |
|---|---|---|---|---|
| NEW | REF | NEW | REF | |
| PPF over | ||||
| Canopy (pmol/m2/s) | 877a±13 | 876a±11 | 783a±24 | 799a±13 |
| PPF at ground (pmol/m2/s) | 99a±6 | 91a±6 | 128a±14 | 115a±3 |
| PPF reflected from ground to bunch (pmol/m2/s) | 39.3a±4 | 36.0a±3 | 44.6a±5 | 36.5a±4 |
| Tair over canopy (°C) | 44.4a±0.9 | 45.4a±0.8 | 33.2a±0.7 | 34.2a±0.8 |
| UR over canopy (%) | 51.0a±3.5 | 48.8b±2.7 | 88.6±2.5 | 84.8±2.4 |
| VPDair over canopy (kPa) | 4.5±0.3 | 5.0±0.5 | 0.6b±0.1 | 0.9a±0.1 |
| Tail bunch level (°C) | 30.3b±0.1 | 31.0a±0.2 | 22.6a±0.3 | 23.2a±0.2 |
| UR bunch level (%) | 43.5a±0.4 | 40.1b0.4 | 74.7a±0.5 | 69.7b±1.5 |
| VPDair bunch level (kPa) | 2.4a±0.1 | 2.7b ±0.2 | 0.7b±0.1 | 0.9a±0.1 |
| Ψ stem (MPa) | -0.72 a±0.3 | -0.77b±0.3 | -0.59a±0.3 | -0.64b±0.3 |
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