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

Table 2

Grain macronutrient concentration in ten corn cultivars representing five different technological levels in 2006 and 2007, at Rolandia County, Parana State, Brazil.

		P	K	Ca	Mg	P	K	Ca	Mg
Treatment		2006				2007
					g kg^−1
Single	AG9010	3.0^a*	3.7^a	0.30^b	1.37^cd	4.1^b	7.7^b	0.12^ab	0.92^ab
Hybrids	DKB950	2.9^a	4.0^a	0.32^b	1.32^d	5.1^a	10.3^a	0.13^ab	1.12^a
Triple	DKB566	2.8^a	3.6^a	0.31^b	1.59^abc	3.8^b	7.4^b	0.10^b	0.90^ab
Hybrids	AG5020	3.0^a	3.4^b	0.38^b	1.45^bcd	3.5^b	6.6^b	0.15^ab	0.94^ab
Double	AG2040	3.4^a	3.7^a	0.49^ab	1.71^a	4.0^b	7.7^b	0.14^ab	1.00^ab
Hybrids	DKB979	2.9^a	3.5^ab	0.66^a	1.39^cd	4.1^b	7.3^b	0.13^ab	0.77^b
Commercial	BRS4157	3.4^a	3.9^a	0.46^ab	1.64^ab	4.0^b	7.5^b	0.13^ab	0.91^ab
Varieties	BR106	3.5^a	3.9^a	0.39^b	1.56^abcd	4.1^b	8.1^b	0.18^a	1.09^ab
Landrace	GI045	3.3^a	3.8^ab	0.29^b	1.55^abcd	3.4^b	6.8^b	0.10^b	0.89^ab
Cultivars	Palotina	3.1^a	3.9^ab	0.36^b	1.32^d	3.8^b	7.7^b	0.13^ab	0.84^ab
Coefficient of variation		14	11	46	11	18	18	33	24

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