Naslov
Influences of phosphorus fertilization on zinc status in maize

Autori
Kovačević, Vlado ; Komljenović, Ilija ; Marković, Mihajlo

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Zinc Crops 2007 - Crop Production and Human Health / - , 2007, -----

Skup
Zinc Crops 2007 - Crop Production and Human Health

Mjesto i datum
Istanbul, Turska, 24.05.2007. - 26.05.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
phosphorus fertilization ; maize ; zinc ; grain ; leaf

Sažetak
The field experiment was conducted on calcaric soil of Knespolje area (Republic of Srpska, Bosnia and Herzegovina). By preliminary soil test (autumn 2003) were found values as follows: pH in KCl = 6.84 ; humus = 4.24 % ; NH4-Acetate + EDTA (pH 4.65) extractable P and Ca = 10 and 22559 mg kg-1. Four rates of P fertilization were applied (May 7, 2004) as follows: a) ordinary fertilization (kg ha-1: 200 N + 80 P2O5 + 120 K2O) ; b) a + 500 kg P2O5 ; c) a + 1000 kg P2O5 ; and d) a + 1500 kg P2O5. The triplephoshate enriched with sulphur and zinc (45% P2O5 + 1, 2% S + 0, 06% Zn) was used for increased P fertilization. Maize hybrids Bc5984 and OsSK494 (2004 and 2005, respectively) were grown on the experimental plot. In the next year, residual effects of P fertilization were tested and the experiment fertilized uniformly (kg ha-1: 200 N + 80 P2O5 + 120 K2O). The ear-leaf of maize was taken at beginning of silking (25 leaves in the mean sample: total 16 samples). The total amount of the elements in the leaf samples was measured by the ICP-AES technique after their microwave digestion using concentrated HNO3+H2O2. Applied fertilization resulted by increases of grain yield up to up to 32% and 17% compared to the control, for 2004 and 2005, respectively. In our study, P fertilization significantly influenced on decreases of the leaf, Zn by 48% (45.2 and 23.7 Zn mg/kg, respectively), but only in the first year of testing. In the next year, residual influences of ameliorative P fertilization on Zn status in corn leaves were not found. However, Zn status in corn grain were independent on P fertilization for 2004, but in the next year Zn contents for ameliorative P treatments were reduced for near 40% (31.3 and 17.4 Zn mg/kg). compared to the control.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA