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• Effects of organic fertilization on the structure and yield of extensive grassland plant populations

  3-8

  Istvan Csizi

  Krisztina Varga

  Andras Halasz

  Views:

  104

  The effects of different organic fertilizer inputs were investigated on natural grassland with solonyec soil conditions at the Karcag Research Institute. Mature sheep manure applied at 0-10-15-20 t/ha at single irrigation in early spring induced positive changes in stand structure and yield even in the semiarid spring of 2022. In the non-irrigated part of the experiment, the difference in the rates of organic manure was hardly affected.

• 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:

  56

  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.

   

• 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.