Influences of fertilization by phosphorus on yield and nutritional status of maize in Potkozarje area

Komljenovic, Ilija and Markovic, Mihajlo and Todorovic, Jovan and Cvijovic, Milica (2006) Influences of fertilization by phosphorus on yield and nutritional status of maize in Potkozarje area. Cereal Research Communications, 34 (1). pp. 549-552. ISSN 0133-3720

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Abstract

The field experiment with four rates of phosphorus (P) fertilization was conducted in spring of 2004 with treatments as follows: a) ordinary fertilization (kg/ha: 200 N + 80 P ₂ O ₅ + 120 K ₂ O); b) a + 500 kg P ₂ O ₅ ; c) a + 1000 kg P ₂ O ₅ ; and d) a + 1500 kg P ₂ O ₅ . The triplephoshate enriched with sulphur and zinc (45% P ₂ O ₅ + 1,2% S + 0,06% Zn) was used as a source of P. Maize (Bc5984 and OsSK494 hybrids, for the growing season 2004 and 2005, respectively) was grown on the experimental plot. P fertilization significantly influenced on decreases of the leaf Mg by 38%, Mn by 30%, Zn by 48% and Mo by 53% compared to the control (mg kg ⁻¹ on the control: 1526 Mg, 44.3 Mn, 45.2 Zn, 2.62 Mo) and increases of the leaf Sr by 31% and Cd by 84% (mg kg ⁻¹ on the control: 62.3 Sr and 0.25 Cd), while differences of the remaining measurable elements (P, K, S, Fe, Cu, Ni, Cr, B, Ba, Na, and Al) were nonsignificant. Also, the leaf As, Hg and Se concentrations were under detectable levels of the method. In general, grain composition was less dependent on the fertilization in comparison with the leaf composition. For the 2005 growing season, only ordinary fertilization was applied. As affected by applied fertilization maize grain yields increased up to 32% and 17% compared to the control, for 2004 and 2005, respectively.

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