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• The Examination of Sandy Grassland Plant Communities in Kunpeszér

  56-62

  Viktor József Vojnich

  Ferenc Baglyas

  Endre Pölös

  Views:

  79

  Our tests were carried out in Kunpeszér, in the territory of the Kiskunság National Park. The coenological recordings were made in 2x2 meter quadrates. We found out the species’ composition and coverage. In the test area mostly Achilleo-Festucetum pseudovinae (grass saline desert) grassland was located. The grassland vegetation flora was degraded by anthropogenic effects (trampling, grazing). The following weeds spread: ragweed (Ambrosia artemisiifolia);
  canadian horseweed (Conyza canadensis); poppy (Papaver rhoeas); white goosefoot (Chenopodium album); hairy pigweed (Amaranthus retroflexus) and prickly plants: spiny restharrow (Ononis spinosa), and field thistle (Eryngium campestre).

• The Bioeconomic Study of Black Locust and Tree of Heaven

  21-28

  András Demeter

  Szilárd Czóbel

  Views:

  92

  In our research we studied the economic potential; curbing costs; and elements of these of two woody stemmed invasive species: black locust (Robinia pseudoacacia L.) and tree of heaven (Ailanthus altissima Mill.) in a period 5 years. Questionnaires were sent to the relevant state institutions (national park directorates and state forest companies), other publicly available background information was collected and telephone interviews were carried out to complete the data. During the evaluation of data we found that the costs of black locust reduction were so high in national park directorates that they could not be compensated by the revenue from the sale. However, in the case of state forest companies, incomes were several times higher than costs each year. The judgment of tree of heaven was negative in all areas, so it could not be sold.