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• The Regeneration of Different Grape Cultivars after the Spring Frost in 2015

  235-240

  Ferenc Baglyas

  Views:

  85

  Spring frost often damages green shoots in vineyards. This was the case on 25 April 2015 in Kecskemét when -2.4 oC temperature was measured in the morning. The temperature largely varied among sites. The trees protected the grapes in the traditional intercultural cultivation. The high trellises also gave protection to vines. The time of budbreak was also a crucial point. Seven grape varieties were examined in the vineyard that is located in Kecskemét-Máriahegy: Kadarka, Pirosszlanka, Kövidinka, Rajnai rizling, Narancsízű, Pannon frankos and Merlan. The Pontica varieties regenerated best. Narancsízű variety is a table grape variety that has a lower bud fertility. Between the two resistant varieties, the numbers of clusters were different. Rhine Riesling which has a late bud burst was less damaged by the frost.

• The Examination of Sandy Grassland Plant Communities in Kunpeszér

  56-62

  Viktor József Vojnich

  Ferenc Baglyas

  Endre Pölös

  Views:

  80

  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).

• Ragweed, Blessing or Curse?

  51-55

  Endre Pölös

  Ferenc Baglyas

  Viktor József Vojnich

  Views:

  114

  Ragweed (Ambrosia artemisiifolia) has become our most widespread weed. It causes a significant economic damage, on the other hand it causes pollen allergy affecting 20% of the country's population. Therefore its reduction has become a major task. An environmentally friendly method has been developed for its destruction by bioherbicides. This bioherbicid contains allochemical retardants. Allelochemicals are active chemical inhibition ingredients between plants (allelopathy). This method has been applied in the Kiskunság National Park (KNP) and the urban areas in the city of Kecskemét. We also present the typical therapeutic effect of ragweed, widely used in North American Indian culture.

• The Effect of Must Clarification on the Quality of Wine

  7-11

  Ferenc Baglyas

  Views:

  117

  The main goal of must clarification is to optimize the physical-chemical and biological conditions of must in order to be able to better manage fermentation and improve wine quality. Must clarification has to be as effective as possible is on the basis of technological and quality aspects (slower fermentation, cleaner fragrance, better conservation of primary and fermentation aromas) in the preparation of quality white wine. Must usually contains 10-30% sediment and this ratio can be higher when rotten grapes are processed or when the pressure in the press is high. Different clarification treatments can lower this rate below 5-10%. By removing sediment the inner surface of must is reduced and further must/wine treatments become easier. It is important not to overclarify the must because sediment contains nutriment for yeasts. As must flotation, separation and hyper-oxidation can damage fragrances and aromas, these methods were not applied.