Effect and residual effect of N fertilisation on the N uptake of winter wheat in a long-term field experiment
| Autor: | I. Németh, K. Berecz |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Acta Agronomica Hungarica. 50:425-431 |
| ISSN: | 1588-2527 0238-0161 |
| DOI: | 10.1556/aagr.50.2002.4.5 |
| Popis: | In wheat production, N fertilisation is one of the most effective agro-technical devices to increase yield and N concentration. In Hungary, fertiliser use, particularly that of N, has dropped dramatically in the last decade. The aim of this experiment was to study the direct and residual effect of N fertilisation on the grain yield and N uptake of winter wheat after 30 years of intensive N fertilisation. A long-term fertilisation experiment was set up on brown forest soil (Eutric Cambisol) with medium N status at Keszthely (Hungary) in 1965. In 1995, the plots were halved. From that year on, half of the plots no longer received N fertiliser, while the other half of the plots was fertilised with increasing N doses. Two years after the treatment modification, no residual effect of long-term intensive N fertilisation (10.44 t N/30 years) could be detected. Under the investigated site conditions, the omission of yearly N fertilisation led to low wheat yields and low N concentrations both in the grains and in the vegetative organs above the uppermost internode. |
| Databáze: | OpenAIRE |
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