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Table 4.

Juice composition at harvest recorded on Viognier B and Carignan N grapevines irrigated with treated wastewater and drinking water, and compared to a bloc not-irrigated in growing season 2017.

  Treatment TSS pH Titratable Tartaric Malic YAN Na K Mg Ca
  (Brix)   acidity acid acid (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
  (g/L)   (g H2SO4/L) (g/L) (g/L)
Viognier B
DW-1 25.6 ab 3.36 b 3.88 ab 7.58 bc 2.48 b 71 ab 38 ab 1 932 88 b 130
DW-2 26.3 b 3.36 b 3.68 a 7.00 a 2.50 b 56 a 17 a 1 825 84 ab 113
TWW-C1 23.4 a 3.31 b 3.98 b 7.30 ab 2.51 b 109 bc 28 ab 1 734 70 ab 105
TWW-C2 25.7 ab 3.38 b 3.84 ab 7.59 bc 2.39 b 115 c 31 ab 1 960 83 ab 109
NI 25.2 ab 3.20 a 4.01 b 7.99 c 1.81 a 40 a 49 b 1 746 66 a 107
Sig. * * * * * * * ns * ns

Carignan N
DW-1 24.1 3.36 ab 3.70 ab 7.02 ab 2.35 a 48 a 38 a 1 845 a 63 65
DW-2 23.7 3.36 ab 3.55 a 6.78 a 2.38 a 59 a 44 ab 1 914 a 53 58
TWW-C1 24.3 3.43 b 3.62 a 7.36 ab 2.46 a 52 a 51 abc 2 148 b 66 88
TWW-C2 23.9 3.38 ab 4.11 b 7.27 ab 3.03 b 79 b 60 c 2 017 ab 53 60
NI 24.4 3.31 a 3.96 ab 7.67 b 2.33 a 67 ab 54 bc 1 982 ab 55 52
Sig. ns * * * * * * * ns ns

Data are means of each treatment. Each value represents n = 3 for treatment. Different letters within columns for each grapevine indicate a significant difference at p > 0.05 (LSD test). *Denote a significant difference between treatments. TSS, total soluble solids; YAN, yeast assimilable nitrogen; ns, not significant; DW, drinking water; TWW-C treated wastewater quality C; NI, non-irrigated; 1, standard irrigation; 2, reinforced irrigation.

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