Effects of Irrigation with Treated Wastewater on Root and Fruit Mineral Elements of Chemlali Olive Cultivar

Table 1

Chemical properties of the well water (WW) and treated wastewater (TWW) used for irrigation in the experimental olive orchard.

Characteristics	WW	TWW	Tunisian limits
pH	7.95 ± 0.10	7.60 ± 0.11	6.50–8.50
EC (dS m^−1)	4.70 ± 0.02	6.30 ± 0.03	7.00
TDS (g L^−1)	1.51 ± 0.02	1.82 ± 0.01	2.00
HCO3^− (mg L^−1)	288.50 ± 0.3	370.00 ± 0.20	600.00
SO4^2− (mg L^−1)	87.50 ± 0.8	363.00 ± 1.50	1000
N total (mg L^−1)	—	58.80 ± 1.20	30.00
N–NO3^− (mg L^−1)	1.11 ± 0.01	15.90 ± 0.05
N–NH4^+ (mg L^−1)	2.24 ± 0.01	37.90 ± 0.01
N–NO2^− (mg L^−1)	0.08 ± 0.02	5.00 ± 0.01
P total (mg L^−1)	0.80 ± 0.11	10.30 ± 0.01	0.05
K^+ (mg L^−1)	30.00 ± 0.09	38.00 ± 0.02	50.00
Na^+ (mg L^−1)	355.00 ± 0.01	470.00 ± 0.02	300.00
Cl^− (mg L^−1)	1580 ± 0.04	1999.00 ± 0.04	600.00
Ca^2+ (mg L^−1)	184.50 ± 0.01	95.80 ± 0.03
Mg^2+ (mg L^−1)	126.20 ± 0.01	83.80 ± 0.02
Pb^2+ (mg L^−1)	0	<0.004	0.10
Cd^2+ (mg L^−1)	0	<0.004	0.005
Zn^2+ (mg L^−1)	0.10 ± 0.01	0.42 ± 0.01	5.00
Mn^2+ (mg L^−1)	0.19 ± 0.01	0.50 ± 0.01
SM (mg L^−1)	4.30 ± 0.02	13.40 ± 0.03
COD (mg L^−1)	0	73.00 ± 0.11	90.00
BOD (mg L^−1)	0	22.00 ± 0.04	30.00

Data represents mean values ± standard deviation.