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• Investigation of carbon dioxide emissions from underutilized grassland

  15-25

  Krisztina Varga

  István Csizi

  Views:

  250

  Climate change-induced extreme changes are making phytomass yields of extensive grasslands in continental areas increasingly dependent on the season. This situation is exacerbated, inter alia, by the decline in grazing livestock production due to a lack of quality labour, and thus by an increase in the proportion of unused or under-utilised grassland. In our experiments, we have refined the effects of a decade of zero, mulch, mowing and meadow utilisation on carbon emissions, soil moisture and soil temperature during two different types of years. We found that zero tillage with accumulated duff in the absence of utilization had the highest carbon dioxide emission values in different years, even at lower soil moisture values. Our results confirm the fact that fallow grasslands can be considered a source of risk due to their increased greenhouse gas emissions.

• Spontaneous winter fire effects on semi-natural grassland

  9-14

  Gabriella Furo

  Krisztina Varga

  Istvan Csizi

  Andras Halasz

  Views:

  157

  The effect of uncontrolled turf fire was investigated on the meadow grassland of the Hungarian University of Agriculture and Life Sciences, Karcag Research Institute. The fire in January 2022, which was very dry, resulted in an increase in the proportion of bunchgrass and uncovered area in the burned area, based on our cenological recordings. We measured higher carbon dioxide emissions in the burned area at all measurement times using an infrared gas analyser. Soil moisture values recorded with soil probes were higher in the control grassland with intact grassland cover. Since we had the opportunity to carry out studies in a drought year, it is absolutely justified to investigate the effects of grass fires in other growing areas and under other precipitation conditions, because their more frequent occurrence in our country can be predicted.

• Effect of organic fertilisation on yield and soil factor values of extensive grassland

  23-28

  Istvan Csizi

  Andras Halasz

  Views:

  44

  The effect of different rates of organic fertilizer was investigated on a natural grassland with solonyec soil conditions at the Karcag Research Institute in the second year after application. Of the mature sheep manure treatments applied at 0-10-15-20 t/ha, the 20 t/ha dose was shown to result in higher dry matter yields. In addition, the 20 t/ha dose of organic manure was shown to stimulate soil life, as supported by measurements of carbon dioxide emissions, and to help better conserve soil moisture.

• 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.