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• Analysis of mineral, phosphorus, potassium, magnesium, zinc and iron content of the sweet maize (Zea mays L. convar. saccharata Koern) hybrid Honey

  21-28

  Zsuzsanna Bakos

  Hajer Mohamed Ibrahim Sidahmed

  János Nagy

  Views:

  120

  The consumption of sweet maize is beneficial in the prevention of cardiovascular diseases, is effective in the prevention of lung diseases, stimulates brain function and its cellulose content helps the stomach and intestines. It is high in magnesium, phosphorus and iron and contains vitamins C, E and D in their natural form.
  The Hungarian-bred Honey normal sweet maize hybrid is excellent for fresh consumption at a tender stage of development. Laboratory tests have shown that Honey sweet maize can play an important role in a healthy diet. It has a favourable mineral content, with a potassium content of almost 10 000 mg/kg, a phosphorus content of 3217 mg/kg, a magnesium content of more than 1300 mg/kg and an important source of iron and zinc with values of 20.3 and 26.5 mg/kg.

• Evaluation of the efficiency of the Debrecen Wastewater Treatment Plant

  59-81

  Dávid Kaczur

  Brigitta Tóth

  Views:

  37

  Proper collection and treatment of wastewater is a priority today to protect environmental values and aquatic ecosystems. In the process of doing so, sewage sludge is produced, which is a by-product of the treatment process. Proper treatment, disposal and disposal of sludge must be ensured in all cases. Wastewater treatment is carried out in several stages, using several methods simultaneously.
  The data show that in both years under review, the treated effluent discharged complies with the limits for BOI5, COD, total nitrogen and total phosphorus set in Decree 28/2004 (25. 12. 2004) of the Ministry of Public Works and Water Management, and therefore does not cause any environmental damage at the receiving site.
  The sewage sludge produced by the treatment plant may be suitable as a substitute for macro- and micro-nutrient fertilisers on the basis of its content. Due to its favourable properties, it could allow a sustainable and economical agricultural use in the long term.
  The performance of the Debrecen Wastewater Treatment Plant meets the requirements in terms of the parameters examined. It can be concluded that, if the quality and quantity of raw sewage arriving at the plant are not changed, and no technological changes are made, the treatment efficiency will not change.

• Plant health studies based on multispectral images in autumn cereal crops

  95-108

  László Radócz

  András Tamás

  Views:

  52

  The development of precision agriculture and digitalisation has brought significant changes in agricultural technology and data-driven decision-making. Unmanned aerial vehicles (UAVs) and multispectral imaging technologies are effective tools for monitoring plant populations and detecting stress conditions (abiotic, biotic). Vegetation indices (NDVI, GNDVI, NDRE, LCI) provide detailed information about the physiological state of plants and the spatial distribution of stress factors. In the research conducted at the University of Debrecen, the ’MV Nádor’ winter wheat variety was examined in combinations of different tillage methods (autumn ploughing, strip tillage) and different nutrient supply treatments. During the multispectral data collection, high-resolution UAV images were used, which were analysed using the QGIS GIS software. The application of nutrients (nitrogen, phosphorus, potassium) and tillage methods had a significant impact on vegetation indices, which reflected the health status and homogeneity or heterogeneity of the plants. The results mean that higher nutrient levels showed more favorable growth and homogeneous plant stand. During the statistical analyses, we infer the spatial effects of stress factors based on the standard deviation and variance values. The values of NDVI and GNDVI indices showed an increasing trend with increasing nutrient levels, especially in the case of the 160 kg/ha nitrogen treatment, which ensures more uniform development. Based on the LCI and NDRE values, we obtained a much higher variance and SD value for the 160 kg N/ha treatment applied in autumn ploughing than for strip cultivation. Based on the data, precision technologies enable more sustainable and predictable crop production.