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• Keskenylevelű ezüstfa hatásai külterjes juhlegelőn

  39-44.

  Views:

  90

  A Debreceni Egyetem Agrár Kutatóintézetek és Tangazdaság, Karcagi Kutatóintézet extenzív juhlegelőjén végeztünk vizsgálatokat, melyek a keskenylevelű ezüstfa inváziós térhódítását érintették. A kutatásunk keretében Balázs-féle cönológiai felvételezést végeztünk, valamint megállapítottuk a Borhidi-féle degradációs fokot, mely azt mutatja, hogy az ezüstfával elfoglalt gyepek területei gyakorlatilag visszafordíthatatlanul degradálódtak. Talajvizsgálati eredményeink azt mutatják, hogy az ezüstfa csurgója által határolt területek talajmintái nitrogénban (pérték: 0,006), valamint foszforban (p-érték: 0,003) gazdagabbak, mint a vizsgált kontroll gyepterület. 

• Kaszálás felhagyásának kezdeti hatása nyugat-magyarországi üde gyepek fajkompozíciójáradhdhdh

  13-20

  Views:

  53

  In our survey we collected data about the behaviour of dominant species on three wet meadows in the West part of Hungary. We focused on species composition, the stability and economic values of the grasslands affected by abandonment and mowing. The meadows are mowed twice a year since 2006. We established abandoned plots (50×50 m) within each meadows in 2012 to investigate how can the species composition shifts by abandonment comparing with the mowed plot. In this study we investigated the abundances of species in 2×2 m quadrates (10 per plot) in three times per a year (April, June, August) in 2012 and 2013. Total species lists are similar (55 ± 6% common species in paired comparison) on the three grasslands, however the reaction of dominant species on mowing and unmowing were different, probably due to also the significant differences in the abundance of dominant species between meadows. The abundance of Festuca arundinacea decreased on every abandoned plot from 2012 to 2013, while the effects of abandonment were different on the abundance of Poa angustifolia. The abundance of Cirsium canum was higher in every mowed and also in every unmowed plot in 2013 than a year before. Comparing the three grasslands the abundance of primary grasses, stinger plants and legumes species were significant different in both investigated years. The significant differences in the abundance of dominant species among grasslands were presumably not only caused by the differences in the applied treatments but also the effects of environmental factors. 

• Impact of mole migration on soil factor indicators of extensive grassland

  25-29

  Krisztina Varga

  Istvan Csizi

  Andras Halasz

  Dominik Nagy

  Csilla Bojte

  Views:

  27

  We investigated the effects of mole walks in extensive grassland soil, focusing on changes in soil factor indicators, 3-3 times per year, in 2022-2023, in Karcag. Based on our results, we found that the drier year 2022 had verifiably higher carbon emission values, only on an annual average, than the wetter year 2023. We found no verifiable differences in soil temperature and soil moisture conditions. Based on our data, it can be concluded that the mammal of choice for the year 2023, the mole, does not have a significant impact on the carbon dioxide emissions of the grassland soil. Further studies in other habitat conditions are definitely warranted.

• Expectable changes in the utilization of pastures: Papers of the „Challenges and Aspects in Grassland Management” conference held on 22-23 May 2008.

  9-12

  Ferenc Der

  Jozsef Stefler

  Views:

  39

  Analysing the past and the future facts and figures of the Hungarian pasture management the authors has been found the following: − In the period between 1993 and 2003 it was generally believed, that the total area of pasture will be increasing in the future. This forecasting comes not be true. − In the period between 2004 and 2008 the Hungarian pasture area decreased with 13%. We can realise decreasing in the total yield and the yield to/ha too. At the same time in the National Parks and on other protected pastures the grassland management was improved. − Analysing the estimated stock of grazing animal and the necessary pasture area the authors give the main features of the Hungarian pasture utilization in the period after 2008. 

• Semi-intensification of an extensive grassland by plant and soil conditioning

  25-27

  Gyorgyi Kovacs

  Vivien Pal

  Geza Tuba

  Istvan Csizi

  Jozsef Zsembeli

  Views:

  96

  In the last century, the area of European grasslands was declining, as a significant part of them were turned to built-up areas, broken or afforested. In addition to the area reduction, in a significant part of Central, Northern and Western Europe, cultivation has been intensified in the cases of former natural and semi-natural, mostly extensively cultivated grasslands in order to produce higher biomass. Pesticides, organic and mineral fertilizers are also used on the lawns, the frequency of mowing increased and the lawns were reseeded. The structural of grasslands also changed significantly. 

• Tájhasználat és gyephasznosítás Natura 2000 területen: – esettanulmány a Balatonkeresztúri rétek példáján –

  31-38

  Views:

  71

  The aim of our study was to describe the actual land use of the Balatonkeresztúri rétek, a Natura 2000 site. We drew a map according to the land use categories. During field studies (in 2013) we recorded the actual land use activities and compared it with the officially registered land use categories. Our results showed that only 42.6% of the meadows and pastures are managed. All of the grasslands should be managed extensively to maintain the diversity of species. The area of grasslands could be extended with the increase of the number of livestock. We expect that the land use will change in a positive way as a result of agricultural supports. The ratio of managed (mowed and/or grazed) grasslands can increase in the future and as a consequence the diversity of grasslands can increase as well.