Total concentrations of Cu and Zn in the grains of rice and wheat^a.

Treatment	Rice grain (mg kg−1)		Wheat grain (mg kg−1)
	Cu	Zn	Cu	Zn
CK	5.89 ± 0.10a	37.73 ± 1.73a	3.84 ± 0.25a	32.66 ± 2.67a
T1	5.76 ± 0.20a	37.58 ± 1.48a	4.01 ± 0.10a	32.72 ± 2.11a
T2	5.88 ± 0.16a	37.76 ± 0.99a	3.85 ± 0.08a	32.18 ± 4.10a
T3	5.75 ± 0.33a	37.45 ± 1.57a	3.79 ± 0.25a	31.75 ± 2.49a
T4	5.88 ± 0.37a	40.37 ± 0.95a	3.91 ± 0.28a	31.57 ± 0.95a

^aThe same letter next to the numbers indicated there were no significant differences among the CK and treatments (p > 0.05).