Availability and Plant Uptake of Biosolid-Borne Metals

Table 3

Metal concentrations (means where 𝑛=4) of three wheat cultivars grown on sand media amended, without biosolids (Standard) and with biosolids^†.

Plant tissue	Treatment	Duration (weeks)
		0–4			4–12
		Chinese Spring	Triticum aestivum	Yecora Rojo	Chinese Spring	Triticum aestivum	Yecora Rojo
		mg kg^−1
		Cd
Shoot	Standard	2.53^a	2.55^a	2.56^a	0.56^b	0.75^b	1.01^a
	Biosolids	24.6^a	29.8^a	24.4^a	6.06^b	8.75^a	8.47^a
Root	Standard	2.63^a	2.64^a	2.84^a	0.75^a	0.78^a	0.72^a
	Biosolids	41.8^a	39.3^a	26.1^b	18.0^a	12.9^c	15.8^b
		Cr
Shoot	Standard	1.75^a	1.73^a	1.75^a	1.54^a	1.15^b	1.52^a
	Biosolids	2.77^a	2.70^a	2.69^a	1.51^a	1.56^a	1.52^a
Root	Standard	1.77^a	1.76^a	1.81^a	1.45^a	1.44^a	1.44^a
	Biosolids	34.5^b	42.7^a	33.2^b	12.2^a	9.11^b	4.99^c
		Cu
Shoot	Standard	16.0^a	15.5^a	16.0^a	4.44^b	4.46^b	5.07^a
	Biosolids	27.7^a	27.4^a	20.0^b	9.50^a	7.73^b	6.41^c
Root	Standard	17.4^a	17.3^a	17.7^a	12.0^a	12.5^a	10.3^b
	Biosolids	79.9^a	77.1^a	77.5^a	64.8^a	59.9^b	60.9^b
		Ni
Shoot	Standard	21.1^a	21.4^a	21.2^a	9.82^a	9.72^a	9.20^a
	Biosolids	64.9^a	54.6^b	54.9^b	40.5^a	34.5^b	34.3^b
Root	Standard	52.5^a	52.6^a	53.7^a	34.4^a	34.6^a	35.1^a
	Biosolids	135^a	158^a	154^a	112^a	120^a	118^a
		Pb
Shoot	Standard	2.62^a	2.41^a	2.63^a	1.49^b	1.41^b	1.93^a
	Biosolids	12.6^a	10.2^b	10.8^b	7.49^a	7.13^a	6.57^b
Root	Standard	2.69^a	2.72^a	2.87^a	1.67^b	2.03^a	2.23^a
	Biosolids	14.2^a	16.2^a	16.6^a	9.24^a	10.9^a	10.0^a
		Zn
Shoot	Standard	45.7^a	43.4^a	42.9^a	31.5^a	28.7^a	31.3^a
	Biosolids	319^a	338^a	271^b	124^a	144^a	125^a
Root	Standard	68.5^a	60.3^b	51.0^c	28.5^a	28.5^a	32.7^a
	Biosolids	610^a	682^a	633^a	304^a	342^a	286^a

†The differences of metal concentrations among the growth period were tested by one-way ANOVA and Student-Newman-Keuls test. Within a row and between shoot and root of each growth periods, values followed by a different letter were significantly different at 𝑃<0.05.