3.4. Nutrient uptake
Potassium is essential for plant water balance, plant growth and
synthesis processes (Amtmann and Rubio, 2012). Total nutrient
uptake of N, P, K, Ca and Mg is summarized in Table 8. Positive effect of RWW on the two crops nutrients uptake can be
observed, especially for K. Prazeres et al. (2013) indicated that
when pretreated cheese whey wastewater was used to irrigate two
tomato cultivars at increasing salinity levels, no significant effects
were observed on different plant attributes like dry matter of the
leaves, stems and roots. Moreover, the results showed that the pretreated wastewater can be a source of nutrients for cucumber and
tomato plants, with reduced effects on growth and development
(Table 7)