Dependence of soil fertility on organic and mineral fertilization in a 46-year long-term field experiment
| Autor: | K. Berecz, S. Hoffmann, S. Simon |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Acta Agronomica Hungarica. 58:35-40 |
| ISSN: | 1588-2527 0238-0161 |
| DOI: | 10.1556/aagr.58.2010.suppl.1.5 |
| Popis: | Increasing doses of farmyard manure (FYM) or equivalent mineral NPK fertilizers and their combinations were analysed in a crop rotation with potato, maize and winter wheat with special regard to their long-term influence on soil fertility. The yield-increasing capacity of FYM doses was only 82%, as compared to the equivalent amount of mineral NPK. Fairly high N release (50.9 kg ha −1 ) could be observed on the unfertilized plots. Great differences in N utilization were recorded, depending on the form and dose of fertilizers. The average N utilization from FYM was only 29.3%, while that of the equivalent fertilizer application was 49.8%. The lowest soil reactions were observed without fertilization and at the highest NPK doses. Negative N balances generally resulted in low soil organic matter content. FYM and equivalent NPK fertilizers had a similar influence on the ammonium lactate (AL)-extractable K 2 O content of the soil, while an increase in the AL-P 2 O 5 content could be observed in the case of mineral fertilization. |
| Databáze: | OpenAIRE |
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