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.
|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) .
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