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Genotypic differences among maize inbred lines in Phosphorus fertilizer responsiveness on soils differing in acidity (CROSBI ID 147575)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Šimić, Domagoj ; Kovačević, Vlado ; Šimić, Branimir ; Rengel, Zed Genotypic differences among maize inbred lines in Phosphorus fertilizer responsiveness on soils differing in acidity // Communications in soil science and plant analysis, 40 (2009), 816-825. doi: 10.1080/00103620802697822

Podaci o odgovornosti

Šimić, Domagoj ; Kovačević, Vlado ; Šimić, Branimir ; Rengel, Zed

engleski

Genotypic differences among maize inbred lines in Phosphorus fertilizer responsiveness on soils differing in acidity

Maize inbred lines, essential for producing commercial hybrid seed, are vulnerable to nutrient deficiencies and imbalances, particularly on acid soils where insufficient levels of plant-available phosphorus (P) exist. There is a need therefore to identify and develop maize inbred genotypes with a high P- utilisation capacity. The objective of this study was to assess the genotypic variation among maize inbred lines for responsiveness to P fertilizers (grain yield and P accumulation) on soils differing in acidity. Seven maize genotypes (elite inbred lines) were tested covering a range of genetic diversity representative of the U.S. Corn-Belt dent germplasm. They were grown for three years at two locations in Eastern Croatia on soils differing in pH by 1.6 units (water or 1 M KCl pH). Phosphorus amendments were applied in the first year of investigation: (i) control (0 P) and (ii) 380 kg P ha-1. The year × P fertilization interaction was highly significant for grain yield on both locations as well as for ear-leaf P concentration on acid soil, whereas the year × genotype interaction was significant for grain yield on both soils. Genotypic responsiveness to high P fertilization rates was in general greater on non-acid than on acid soil due to limitations imposed by acid stress. However, the line A672 had the same yield responsiveness to high P fertilization rates irrespective of soil acidity. The inbred Os84-44 had consistently the highest grain yield regardless of P fertilization rate and soil pH. Therefore, there is variation among maize inbred lines for responsiveness to high P fertilization rates on soils of different acidity. This variation may be due to differential tolerance to soil acidity and/or the interaction between acid soil tolerance and a response to P fertilization.

genotypes ; maize ; P-fertilizer responsiveness ; soil acidity ; yield

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Podaci o izdanju

40

2009.

816-825

objavljeno

0010-3624

10.1080/00103620802697822

Povezanost rada

Poljoprivreda (agronomija)

Poveznice
Indeksiranost