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• Effect of NPK fertilization and manure load on the grazed natural permanent grassland

  16-25

  Imre Kadar

  Petr Ragalyi

  Laszlo Szeman

  Laszlo Marton

  Sandor Nagy

  Views:

  64

  1. The 2^nd 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.
  2. 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.
  3. 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.
  4. 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.

   

• Sandy grasslands regeneration results of the conservation management on the Homoktövis Conservation Area in Budapest (2009 2021)

  33-35

  Norbert Peter

  Zoltan Bajor

  Denes Salata

  Gergely Papay

  Zsuzsa Lisztes-Szabo

  Ferenc Tamas Stilling

  Zita Zimmermann

  Karoly Penksza

  Views:

  152

   In Budapest, despite the density of the population, precious plant communities still remain in a lot of, mostly isolated fragments of habitats which,are outstanding in the diversity of species and are rare inhabitants of endemic species. On the examined territory, since 2006 long term reconstructions of the habitats have been ongoing which strive for the decrease of the invasive woody species on the territory and the insurance of the habitat of the sandy lawn, as well as the long term conservation of the fragments of the lawn and the creation of the natural sandy lawn. This activity is conducted by the volunteers of the MME and with the help of the students of educational institutions in parallel requesting for the permits of the Municipality of the Capital. During these interventions, the shoots were mechanically beat down and they were wiped dried as well. Besides these interventions, it was fundamental to preserve the sensitive, rare or legally protected species and to increase their volume as much as possible.