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master's thesis
Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji
2016. urn:nbn:hr:151:833404
Ravnjak, Boris
Josip Juraj Strossmayer University of Osijek
Faculty of Agrobiotechnical Sciences Osijek
Department of Plant Production and Biotechnology

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Ravnjak, B. (2016). Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek. Retrieved from https://urn.nsk.hr/urn:nbn:hr:151:833404

Ravnjak, Boris. "Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, 2016. https://urn.nsk.hr/urn:nbn:hr:151:833404

Ravnjak, Boris. "Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji." Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, 2016. https://urn.nsk.hr/urn:nbn:hr:151:833404

Ravnjak, B. (2016). 'Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji', Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, accessed 16 December 2024, https://urn.nsk.hr/urn:nbn:hr:151:833404

Ravnjak B. Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek; 2016 [cited 2024 December 16] Available at: https://urn.nsk.hr/urn:nbn:hr:151:833404

B. Ravnjak, "Uloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji", Master's thesis, Josip Juraj Strossmayer University of Osijek, Faculty of Agrobiotechnical Sciences Osijek, Osijek, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:151:833404

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Metadata
TitleUloga nitrofiksirajućih bakterija Azotobacter spp. i Azospirillum spp. u biljnoj proizvodnji
Title (english)The role of nitrofixing bakterija Azotobacter spp. i Azospirillium spp. in plant production
AuthorBoris Ravnjak
MentorSuzana Kristek (mentor)
Committee memberSanda Rašić (predsjednik povjerenstva)
Committee memberDrago Bešlo (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Faculty of Agrobiotechnical Sciences Osijek
(Department of Plant Production and Biotechnology)
Osijek
Defense date and country2016-07-21, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Agronomy
Crop Production
Abstract
U prirodi postoji kružni tok dušika. Iz atmosfera ga usvajaju mikroorganizmi tijekom procesa koji se naziva fiksacija dušika. Biološka fiksacija dušika je proces u kojem posebne skupine mikroorganizama usvajaju plinoviti dušik iz atmosfere i preko enzima nitrogenaze ga reduciaraju do amonijaka. Nesimbiotski fiksatori dušika pripadnici su roda Azotobacter, Azospirillum, Bacillus, Klebsiella. Bakterije roda Azotobacter i Azospirillum imaju važnu ulogu kao nitrofiksatori opskrbljujući biljke dušikom, poboljšavaju rast i razvoj korijena, svojom aktivnošću potiču rast biljaka, povećavaju prinos, proizvode vitamine i enzime, povećavaju usvajanje vode i mineralnih hraniva, utječu na brojnost populacije korisnih mikroba, a i negativno djeluju na fitopatogene gljive. Sadržaj bakterija rodova Azotobacter i Azospirillum, uz celulolitičke mikroorganizme u tlu, predstavlja indikator plodnosti tla. Dobar mikrobiološki sastav tla ne samo da je preduvjet za visoke prinose, nego i za reduciranje mineralne gnojidbe i kemijskih pesticida, a što je s ekonomskog i ekološkog gledišta od iznimnog značaja.
Abstract (english)
There is a circular flow of nitrogen in nature. During a process called nitrogen fixation micro-organisms digest it from the atmosphere. Biological nitrogen fixation is a process in which specific groups of microorganisms adopt gaseous nitrogen from the atmosphere and through the enzyme nitrogenase reduce it to ammonia. Non-symbiotic nitrogen fixation are members of the Azotobacter, Azospirillum, Bacillus, Klebsiella genus. Bacterias of the genusAzotobacter and Azospirillum play an important role as nitrofiksators supplying the plants with nitrogen, improving growth and development of the root and with its activities stimulating plant growth, increasing yield, producing vitamins and enzymes, increasing the adoption of water and mineral nutrients, affecting the population count of beneficial microbes and the negative affect on phytopathogenic fungi. The content of bacterial genus Azotobacter andAzospirillum, with cellulolytic microorganisms in the soil, represents an indicator of soil fertility. Good microbiological composition of the soil is not only a prerequisite for high yields, but also for the reduction of mineral fertilizers and chemical pesticides, what is of the great importance from the economic and environmental point of view.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:151:833404
Study programmeTitle: Plant Production; specializations in: Plant Production, Plant Nutrition and Soil Science, Plant Selection and Seed Production, Plant Protection
Course: Plant Production
Study programme type: university
Study level: graduate
Academic / professional title: magistar/ magistra inženjer/inženjerka bilinogojstva (magistar/ magistra inženjer/inženjerka bilinogojstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2016-09-27 09:25:44