ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agronomy, Vol. LX
Written by Ali COSKAN, Kemal DOGAN, Ahmet DEMIRBAS, Ibrahim ERDAL, Ismail HORZUN, Emin Cagdas OK

This study was carried out as a pot experiment to determine the effects of dolomite alone or together with leonardite on Ca and Mg uptake of pepper plants. The doses of 8 and 16 g.pot-1 of dolomite which were equivalent to 4000 and 8000 kg.ha-1 incorporated to soil as either alone or together with 8 and 16 g.pot-1 of leonardite. Each pot fertilized by 200 N, 150 P2O5 and 150 K2O. Results revealed that application of neither dolomite nor dolomite + leonardite applications were effective on root dry matter development; however, 4000 kg.ha-1 dolomite + 4000 kg.ha-1 leonardite incorporation yielded the highest shoot dry weight. Ca concentrations of plants were increased by increasing doses of dolomite and leonardite. Dolomite incorporation alone at the dose of 4000 kg.ha-1 improved plant Mg concentration, all other applications was reduced plant Mg contents compared to non-treated (NT) variant. Zn and Mn concentration were also measured in this study. Zn concentration was 96 at non-treated variant which was reached its highest value as 221 at 4000 kg.ha-1 dolomite dose. The lowest obtained value within the dolomite and dolomite + leonardite applied pots was 143 which was still 49% higher than NT. Mn concentration was gradually increased by increasing dose of both applications, starting from 80 in NT to 192 at the highest application doses of dolomite and dolomite + leonardite. Stimulating effect of leonardite was observed in shoot dry wegiht, Ca, Cu and Mn concentration whereas Mg and Zn concentration was diminished by leonardite addition to the dolomite.

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