Abstract
Soil microorganisms are one of the main indicators used for assessing the stability of the soil ecosystem, the metabolism in the soil, and its fertility. The most important are the active soil microorganisms and the influence of the fertilizer applied to the soil on the abundance of these microorganisms. We aimed to investigate how the applied organic fertilizers affect the most active soil microorganisms, which determine the soil fertility and stability. Fungi, yeast-like fungi abundance, and abundance of three physiological groups of bacteria were analyzed: non-symbiotic diazotrophic, organotrophic, and mineral nitrogen assimilating. This study is valuable because relatively few similar studies have been performed on infertile Lithuanian soils. The first results of a long-term study were obtained. The results show the effect of fertilizers on trends in the changes of microorganism community diversity; however, more analysis is needed to assess the impact of organic fertilizers on the most active soil microorganisms. Therefore, the investigation was continued. The results of the 2020 quantitative analysis of culturable soil microorganisms show that the highest abundance of organotrophic and non-symbiotic diazotrophic bacteria were recorded during the summer season. Meanwhile, the abundance of bacteria assimilating mineral nitrogen and fungi was higher in autumn. Agrochemical parameters were determined at the beginning of the experiment. The highest concentration of Nmin in the soil was determined after fertilizing the plants with the combination of granulated poultry manure (N170) + biological substance Azotobacter spp. The yield of barley was calculated. It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers.
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Claims 4
Claim · model-written summary
Organotrophic and non-symbiotic diazotrophic bacteria were most abundant in summer in the soil of spring barley fields.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaree1 - Outcome
- abundance of organotrophic and non-symbiotic diazotrophic bacteriae0
- Direction
- higheste0
- Setting
- summer seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the highest abundance of organotrophic and non-symbiotic diazotrophic bacteria were recorded during the summer season”
e1“It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers”
Claim · model-written summary
Bacteria assimilating mineral nitrogen and fungi were more abundant in autumn in the soil of spring barley fields.
- Taxon
- spring barleyHordeum vulgaree1
- Outcome
- abundance of bacteria assimilating mineral nitrogen and fungie0
- Direction
- highere0
- Setting
- autumne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the abundance of bacteria assimilating mineral nitrogen and fungi was higher in autumn”
e1“It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers”
Claim · model-written summary
Granulated poultry manure (N170) with Azotobacter spp. gave the highest soil Nmin concentration.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- granulated poultry manure (N170) + biological substance Azotobacter sppe0
- Interactor
- Azotobacter spp
Azotobactere0symbiont - Outcome
- concentration of Nmin in the soile0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest concentration of Nmin in the soil was determined after fertilizing the plants with the combination of granulated poultry manure (N170) + biological substance Azotobacter spp”
e1“It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers”
Claim · model-written summary
Organic fertilizers combined with mineral fertilizers gave the highest spring barley yield in 2020.
- Taxon
- spring barleyHordeum vulgaree0
- Treatment
- organic in combination with mineral fertilizerse0
- Outcome
- yielde0
- Direction
- higheste0
- Qualifier
- in 2020e0
- Setting
- experimental fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was found that the highest yield of spring barley in 2020 was obtained by fertilizing the experimental field with organic in combination with mineral fertilizers”
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