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

Table 3

Roots Ca, Mg, Na and Cl contents in the three treatments: rainfed (RF), well water (WW), and treated wastewater (TWW) in “on” and “off” year.

Parameter	Year	Off (2003)			On (2004)
		RF	WW	TWW	RF	WW	TWW
Ca (% d.m.)	Winter	1.88^cA	2.90^bC	3.12^aA	0.61^cD	1.70^aD	1.23^bD	***
	Spring	1.60^cB	3.51^aA	2.89^bB	1.45^cB	2.30^bB	3.10^aB	***
	Summer	1.50^cC	3.10^aB	2.84^bB	1.88^cA	2.51^bA	3.32^aA	**
	Autumn	1.09^bD	1.58^aD	1.58^aC	0.97^cC	2.40^aC	1.50^bC	**
Mg (% d.m.)	Winter	0.40^bA	0.45^bB	0.55^aA	0.27^bA	0.48^aA	0.43^aB	**
	Spring	0.28^cB	0.51^aA	0.45^bB	0.18^bB	0.42^aB	0.40^aB	**
	Summer	0.16^cC	0.46^aB	0.33^bC	0.32^cA	0.52^bA	0.70^aA	***
	Autumn	0.18^cC	0.50^aA	0.40^bB	0.30^cA	0.49^bA	0.66^aA	***
Na (% d.m.)	Winter	0.005^cB	0.02^bB	0.21^aB	0.005^cB	0.09^bB	0.31^aA	ns
	Spring	0.009^cA	0.12^bA	0.19^aB	0.007^cA	0.13^bA	0.23^aC	ns
	Summer	0.004^cB	0.03^bB	0.29^aA	0.009^cA	0.05^bC	0.27^aB	ns
	Autumn	0.004^cB	0.12^bA	0.31^aA	0.004^cB	0.09^bB	0.29^aB	ns
Cl (% d.m.)	Winter	0.02^cA	0.36^bA	0.54^aA	0.02^bA	0.45^aA	0.45^aB	ns
	Spring	0.02^cA	0.26^bB	0.55^aA	0.01^cA	0.27^bB	0.45^aB	ns
	Summer	0.03^cA	0.24^bB	0.45^aB	0.01^cA	0.23^bB	0.36^aC	ns
	Autumn	0.02^cA	0.27^bB	0.54^aA	0.01^cA	0.27^bB	0.54^aA	ns

Small letters indicate significant differences (𝑃≤0.05) among treatments within each season and for each year according to LSD test. Capital letters indicate significant differences (𝑃≤0.05) among seasons within each treatment and for each year according to LSD test. Asterisk indicates significant differences between years (mean values of RF, WW and TWW): nonsignificant (ns) and significant at 𝑃≤0.01 (**) and 𝑃≤0.001 (***) according to LSD test.