Influence of Corn (Zea mays L.) Cultivar Development on Grain Nutrient Concentration

Table 4

Macronutrients exportation of maize cultivars in 2006 and 2007, at Rolandia County, Parana State, Brazil.

		P	K	Ca	Mg	P	K	Ca	Mg
Treatment		2006				2007
					kg ha^−1
Single	AG9010	7.0^ab	8.6^abc	0.74^bc	3.2^bc	38.0^ab	70.8^b	1.09^abcd	8.6^ab
Hybrids	DKB950	7.0^ab	9.5^abc	0.76^bc	3.2^bc	45.8^a	91.8^a	1.16^abc	10.1^a
Triple	DKB566	9.1^a	11.6^a	0.98^b	5.1^a	32.8^b	63.0^b	0.85^bcd	7.5^abc
Hybrids	AG5020	8.5^ab	9.5^abc	1.06^b	4.1^ab	35.2^b	66.9^b	1.55^a	9.6^ab
Double	AG2040	7.4^ab	8.2^abc	1.09^b	3.7^bc	37.5^ab	72.1^b	1.26^ab	9.4^ab
Hybrids	DKB979	8.7^a	10.5^ab	1.83^a	4.2^ab	38.0^ab	68.0^b	1.28^ab	7.2^bc
Commercial	BRS4157	6.9^ab	7.9^bc	0.92^b	3.3^bc	22.6^cd	42.7^cd	0.75^bcd	5.1^cd
Varieties	BR106	5.7^b	6.5^c	0.60^bcd	2.6^c	29.7^bc	57.8^bc	1.28^ab	7.8^abc
Landrace	GI045	2.3^c	2.7^d	0.21^cd	1.1^d	16.6^d	32.9^d	0.51^d	4.3^d
Cultivars	Palotina	0.7^c	0.8^d	0.09^d	0.3^d	17.8^d	35.5^d	0.64^cd	3.9^d
Coefficient of variation		18	11	10	11	11	20	22	44

* Averages followed by the same letter in a column did not differ according to Duncan’s multiple range test (𝑃≤0.05).