Cikk (Article)
Effect of NPK fertilization and manure load on the grazed natural permanent grassland
Published:
2021-11-24
https://doi.org/10.55725/gygk/2007/5/1-2/10355
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Kadar, I., Ragalyi, P., Szeman, L., Marton, L., & Nagy, S. (2021). Effect of NPK fertilization and manure load on the grazed natural permanent grassland. Grassland Studies, 5(1-2), 16-25. https://doi.org/10.55725/gygk/2007/5/1-2/10355
Abstract
- The 2nd year effects of fertilization at Cserkeszőlő site were not proven statistically in hay yield. However, the NP-fertilization and the sheep manure gave 1-1.5 t/ha hay surpluses at Bakonszeg farm. The mineral composition of the hay did not change significantly as a function of treatment neither at Cserkeszőlő, nor at Bakonszeg site.
- Elevated, in some cases extreme high K, N, Ca, P, Mg, S and partly Sr, Cd, B concentrations were found in the above ground plant tissue on the resting hump; as well as Fe, Na, Al, Cr and Co concentrations on the driveway. Plant samples were not cleaned or washed so surface pollution could also contribute to the abnormal composition.
- According to soil analyses the organic matter content increased in the 0-40 cm layer at watering-place and screen wall. The NO3-N content can reach 250-300 kg/ha level in the 0-1 m soil layer under the watering-place. The potassium rose more fold in the 0-40 cm layer at passageway, watering-place and near to screen wall. The NH4-acetate+EDTA-soluble P content of the whole 0-1 m layer showed 2-fold excess at driveway, 4-fold at resting hump, watering-place and screen wall, as well as 23-fold at passageway.
- The resting hump and passageway showed Zn pollution/accumulation. This phenomenon needs to be cleared by more examination. The soluble Fe increased in the topsoil near to screen wall, while soluble S in the topsoil of the watering place and around screen wall. The 0-20 cm soil layer had 72 mg/kg NH4-N and 25 mg/kg NO3-N, so N load can reach 300 kg/ha. The rear, suffering grass stand on this place can not use this N-pool, so here point pollution can be significant.