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Wyszukujesz frazę "Azotobacter spp." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Occurrence of Azotobacter spp. in cultivated soils in Poland
    Autorzy:
    Kozieł, Monika
    Martyniuk, Stefan
    Siebielec, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/2148493.pdf
    Data publikacji:
    2021-03-31
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    abundance of Azotobacter spp.
    soil
    soil properties
    Opis:
    Azotobacter spp. are soil bacteria capable of fixing atmospheric nitrogen and making it available to plants. This makes them microorganisms of hight importance to the agriculture. The distribution of these bacteria is a complicated subject and is correlated with diverse factors, witch determine the presence or absence of the bacteria in a specific soil. The soil properties as soil and fertility and climate conditions affect the abundance of diazotrophs. Research material consisted of 182 soil samples taken in 2015 from agricultural land in various voivodeships. The number of Azotobacter spp. was determined based on plate method. The presented study evaluated the abundance of Azotobacter spp. in various Polish soils and confirmed the relationship between soil properties and the presence of these bacteria. The studied bacteria were present in 37% of soil samples and numbers of these bacteria varied widely, from 3 to 10801 cfu g-1 of the soil. In the case of Azotobacter spp., soil acidity was also an important factor restricting the occurrence of these bacteria in soils.
    Źródło:
    Polish Journal of Agronomy; 2021, 44; 3-8
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Factors determining the occurrence and number of bacteria of the genus Azotobacter in the soil environment
    Autorzy:
    Kozieł, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/26917707.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    soil properties
    pH
    Azotobacter spp.
    atmospheric nitrogen fixation
    Opis:
    Bacteria belonging to the genus Azotobacter are microorganisms commonly found in various soils all over the world and capable of fixing atmospheric nitrogen. The biological nitrogen fixation (BNF) process annually supplies approximately140–170 million tons of this element to the nitrogen cycle, which is of great importance from an ecological and practical point of view. Although the efficiency of atmospheric nitrogen fixation by Azotobacter spp. is relatively high and amounts to 20 mg N per1 g of glucose used, these bacteria are sensitive to various environmental factors, including soil reaction, contents of organic matter, soil humidity or nutrient content, and their abundance in soils is small. These bacteria secrete numerous biologically active substances into the soil environment, which have a beneficial effect on the development of plants, which from the ecological point of view plays an important role in the functioning of agricultural ecosystems. An additional advantage of bacteria belonging to the genus Azotobacter, which speaks for their use in agriculture, is the ability to produce antifungal and solubilization of insoluble phosphates. Research on Azotobacter spp. proves that the concentration of hydrogen ions (pH) is a significant factor which determines the presence of this group of bacteria in the soil environment. Many other soil properties have a large impact on the presence and development of this important agricultural group of bacteria. The aim of the work was to systematize the knowledge on the known occurrence conditions and ecological relationships and interactions between environmental factors and the presence and abundance of Azotobacter bacteria in soils.
    Źródło:
    Polish Journal of Agronomy; 2023, 52; 14-21
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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