Wittmann Antal Növény-, Állat- és Élelmiszertudományi DI

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https://hdl.handle.net/2437/244229

Böngészés

Wittmann Antal Növény-, Állat- és Élelmiszertudományi DI Szerző szerinti böngészés "Ásványi, Balázs"

Megjelenítve 1 - 2 (Összesen 2)
  • Nincs kép
    TételKorlátozottan hozzáférhető
    Influencing the growth kinetics of yeast strains with vitamin supplementation
    Molnár, Judit; Lakatos, Erika; Ásványi, Balázs; PhD hallgató; egyetemi oktató, kutató
    The aim of the curent experiment was to optimize the creation process of single cell protein on plant-based substrate solution with the intention to improve end-product turn aut by means of adding vitamin solution. Based on the results of the fermentation processes of yeast strains, it was concluded that the vitamin-supplementation produced its greatest effect on the dry matter production, primarily on the K. marxianus DSM 4908 strain, while it was less beneficentwhen it comes to the figures of wet cell mass. In addition, it can be assumed that vitamin supplementation increased the maximum specific rate of growth (μmax) and decreased the generation time (tg) significantly. In the case of the K. marxianus yeast strain on corn steep liquor treated with vitamin-supplementation, the highest (μmax) and the lowest (tg) data were observed [(0.226h-1) and (4,4 h), respectively]. Based on the results it was found that K. marxianus DSM 4908 is expedient to be applied on corn steep liquor medium in order to determine its suitability to produce additive for feeding
  • Nincs kép
    TételKorlátozottan hozzáférhető
    Study of the antifungal effect of a copper-containing foliar fertilizer
    Giczi, Zsolt; Kalocsai, Renátó; Vona, Viktória; Szakál, Tamás; Lakatos, Erika; Ásványi, Balázs; PhD hallgató; egyetemi oktató, kutató
    Winter wheat (Triticum aestivum L.) is one of the most important arable crops. Copper-containing fertilizers are used in crop production to treat or reduce the negative effects of copper deficiency. Various copper compounds are also widely used as effective fungicide agents. The influence of a copper-containing foliar fertilizer prepared from a copper solution and sucrose had been tested on the yield and raw protein content of winter wheat in previous field experiments. In this work, we studied the antifungal effect of this particular foliar fertilizer in an in vitro trial, wherein the fungicide effect on growth and reproduction of specific plant pathogens, i.e., Fusarium graminearum and Drechslera sorokiniana, was evaluated with the agar well diffusion method. The results showed that doses of the foliar fertilizer corresponding to field applications of at least 1 kg ha−1 had antifungal effects, which were significant (P < 0.01) above the concentration level of 3337 mg L−1, corresponding to 2 kg ha−1 application, against both fungal pathogens. A linear correlation (r2 > 0.95) was found between copper concentration and fungicide efficiency in the concentration range studied. The fungicide efficiency of the foliar fertilizer was lower than that of the commercially available copper-oxychloride fungicide. The sole use of the foliar nutrient tested probably cannot replace fungicide treatments. However, in addition to its plant nutrition effect, its antifungal properties should also be taken into consideration.