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

Within row, for each date, values followed by different letters were statistically different at ANOVA F test (p = 0.05).

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