Temat: BNF - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Znaczenie procesu biologicznego wiązania azotu atmosferycznego w rolnictwie ekologiczym
The importance of biological fixation of atmospheric nitrogen in ecological agriculture
Autorzy:: Martyniuk, S.
Powiązania:: https://bibliotekanauki.pl/articles/337002.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: azot atmosferyczny
rolnictwo ekologiczne
wiązanie biologiczne BWAA
bakterie
atmospheric nitrogen
ecological agriculture
biological fixation BNF
bacteria
Opis:: Zdolność do biologicznego wiązania azotu atmosferycznego (BWAA) jest do szeroko rozpowszechniona w przyrodzie, ale tylko wśród bakterii - mikroorganizmów prokariotycznych. Proces ten przeprowadzany jest przez różne grupy fizjologiczne bakterii. Pod względem ekologicznym wyróżniane są : wolno żyjące asymilatory N2 występujące w glebie i zbiornikach wodnych (Azotobacter, Clostridium, Nostoc), bakterie wiążące azot w asocjacjach z korzeniami roślin (Azospirillum) oraz bakterie wiążące N2 w ścisłych układach symbiotycznych z roślinami (Rhizobium - rośliny motylkowate, Frankia - olsza). W referacie omówiono ww. systemy BWAA oraz ich przyrodnicze i gospodarcze znaczenie.
It has been estimated that annually over 100x106 tons of atmospheric nitrogen is introduced into the global nitrogen cycle as a result of biological nitrogen fixation (BNF). Until 90s BNF was the largest source of biologically available nitrogen in the biosphere. The assessments performed in the last decade of the XX century indicate that the amounts of anthropogenically fixed nitrogen exceed those of fixed by the biological process. Ability to fix atmospheric nitrogen is quite common in nature but it occurs only within prokaryotic microorganisms. Different physiological groups of bacteria are engaged in this process. From ecological point of view there are: free-living N2 fixers (Azotobacter, Clostridium, Anabaena, Nostoc), bacteria (Azospirillum) that fix atmospheric N in close associations with roots of some plants and bacteria fixing N2 in symbiotic systems with plants (Rhizobium - legumes or Frankia - alder symbioses). In this review different symbiotic systems have been characterised as well as their ecological and agronomic importance, particularly in organic (ecological) agriculture.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2008, 53, 4; 9-14
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: The role and future potential of nitrogen fixing bacteria to boost productivity in organic and low-input sustainable farming systems
Autorzy:: Cummings, S. P.
Powiązania:: https://bibliotekanauki.pl/articles/363186.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: zrównoważony system rolniczy
biologiczne wiązanie azotu
produktywność
bakterie diazotroficzne
sustainable farming system
organic farming system
productivity
biological nitrogen fixation
BNF
diazotrophic bacteria
Opis:: Biological nitrogen fixation (BNF) results from the interaction between a plant and diazotrophic bacteria. The bacteria are either free living in the soil or live in symbiosis with the plant. Despite biological nitrogen fixation offering a sustainable solution to nitrogen limitation in agricultural soils its use is in decline. Problems with this technology can arise for two major reasons. Firstly, the inappropriate use of diazotrophs with the expectation of achieving N2 fixation. Free-living diazotrophs have been used as inoculants of non-legume crops for many years, however, their mechanism of action remains to be thoroughly characterised. While some may interact with crops to increase available N in soil, many achieve increases in crop yield through the production of plant hormones. This adds nothing to the soil N budget and increases in yields observed are often variable. The second problem occurs when legumes are used to increase soil N in combination with rhizobial symbionts. Frequently poor nodulation of the legumes is observed in the field even when inoculated with .elite. strains of rhizobia. These observations are a consequence of one or more factors, including the use of low quality inoculants, the inability of the rhizobial inoculant to tolerate soil conditions, or their lack of competitiveness for nodule occupancy with indigenous soil rhizobia. These issues can be overcome by the use of more rigorous criteria in inoculant selection and production. The use of inoculants developed from indigenous soil rhizobia offers a tailor made solution to obtaining inoculant strains that are competitive in a particular soil with a specific crop. Here, examples of where this approach has been successful and the potential of this technology to increase the use of BNF in more marginal soils are discussed.
Źródło:: Environmental Biotechnology; 2005, 1, 1; 1-10
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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