Table 1.
Estimated nutrients supply at an irrigation rate of 500–925 by Viognier B plot and 450–875 m3 ha−1 by Carignan N plot in treatments TWW-C1 and TWW-C2, respectively, in 2017 growing season, compared to annual fertilization needs of grapevine.
| Parameters | Viognier | Carignan | Annual fertilisation-needs* | Unit | ||
|---|---|---|---|---|---|---|
| TWW-C | TWW-C | |||||
| 1 | 2 | 1 | 2 | |||
| Total Nitrogen | 21 | 39 | 19 | 37 | 20 – 70 | kg N ha−1 |
| Phosphorus | 0.6 | 1.1 | 0.5 | 1.0 | 3 – 10 | kg P ha−1 |
| Potassium | 15 | 28 | 14 | 27 | 25 – 70 | kg K ha−1 |
| Calcium | 45 | 84 | 41 | 79 | 39 – 80 | kg Ca ha−1 |
| Magnesium | 11 | 19 | 9 | 18 | 6 – 15 | kg Mg ha−1 |
| Sulfate | 25 | 47 | 23 | 44 | 6 | kg S ha−1 |
TWW-C: treated wastewater quality C; 1: standard irrigation; 2: reinforced irrigation; *Galet P. (1993) [34].
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