scholarly journals Cavitated charcoal -- an innovative method for improving the biochemical properties of soil

Author(s):  
Krzysztof Gondek ◽  
Monika Mierzwa Hersztek ◽  
Wojciech Grzyma a ◽  
Tomasz G b
Author(s):  
Rafał STRACHEL ◽  
Jadwiga WYSZKOWSKA ◽  
Małgorzata BAĆMAGA

The aim of these studies was to determine the influence of excessive zinc doses on the microbiological and enzymatic properties of soil. Also, an evaluation of the possibility to stimulate remediation processes by nitrogen fertilisation of the soil was attempted. Zinc was applied to loamy sand in the amounts of 0, 250, 500, 750, 1000, 1250 mg Zn2+ kg–1 DM soil, while nitrogen in the form of urea in doses of 0, 250, 500 mg N kg–1 DM soil. Soil samples were incubated at a temperature of 25 °C, maintaining a constant humidity equal to 50% of the maximum water capacity. In the 2nd and 20th week of the experiment, the following factors were determined: activity of dehydrogenases and catalase, and number of organotrophic bacteria, copiotrophic bacteria, oligotrophic bacteria, actinomycetes, and fungi. Zinc inhibited the enzymatic activity of the soil, while causing a slight increase in populations of microorganisms. Only fungi reacted unequivocally positively to contamination of the soil with zinc, therefore demonstrating changes in the biodiversity of microorganisms. Nitrogen fertilisation of the soil resulted in stabilization of the environment contaminated with zinc by stimulation of growth of microorganisms resistant to the influence of this metal.


Author(s):  
Jadwiga Wyszkowska ◽  
Jan Kucharski ◽  
Monika Tomkiel ◽  
Jadwiga Wyszkowska ◽  
Małgorzata Baćmaga ◽  
...  

2018 ◽  
Vol 69 (3) ◽  
pp. 169-176
Author(s):  
Małgorzata Baćmaga ◽  
Jadwiga Wyszkowska ◽  
Jan Kucharski ◽  
Piotr Kaczyński

Abstract Laboratory tests were performed on sandy loamy soil to establish the relations between bacterial diversity, soil enzyme activity and degradation of Amistar 250 SC, Falcon 460 EC and Gwarant 500 SC fungicides. Apart from carrying out microbiological and biochemical analyses, the residues of active substances from the tested fungicides were determined. Structural diversity of was determined based on the next-generation sequencing (NGS) method, and fungicide residues the liquid chromatography tandem-mass spectrometry (LC-MS/MS). It was found that changes in bacterial diversity occurred in the soil subject to fungicide treatment, particularly at the family and genus level. Proteobacteria, Firmicutes and Actinobacteria were prevailing in all soil samples. Bacillus occurred both in the control soil and in the soil treated with fungicides, while Pseudonocardia occurred only in the fungicide-treated soil. Of all the fungicides tested, the biggest changes in bacterial diversity were caused by Gwarant 500 SC. The preparations tested not only affected the composition of soil microbiota, but also contributed to changes in the biochemical properties of soil by inhibiting the activity of almost all tested enzymes, with the exception of alkaline phosphatase and β-glucosidase. Chlorothalinil was the fastest degraded in the soil and spiroxamine at the slowest.


2017 ◽  
Vol 18 (8) ◽  
pp. 2727-2737 ◽  
Author(s):  
Ewa Błońska ◽  
Jarosław Lasota ◽  
Wojciech Piaszczyk ◽  
Małgorzata Wiecheć ◽  
Anna Klamerus-Iwan

2013 ◽  
Vol 59 (No. 11) ◽  
pp. 500-504 ◽  
Author(s):  
J. Wyszkowska ◽  
A. Borowik ◽  
J. Kucharski ◽  
M. Baćmaga ◽  
M. Tomkiel ◽  
...  

This study evaluates the effectiveness of organic fertilizers in restoring the homeostasis of soils contaminated with zinc. The activity of selected enzymes participating in the transformation of carbon, nitrogen, phosphorus and sulfur and the sensitivity of white mustard plants to zinc were analyzed. A greenhouse pot experiment was carried out. Uncontaminated soil served as control. Six organic substances which potentially neutralize the adverse effects of zinc were used: tree bark, finely ground barley straw, pine sawdust, cattle manure, compost and cellulose. It was found that in less contaminated soil (300 mg Zn<sup>2+</sup>/kg), all of the analyzed organic substances minimized zinc adverse effects on the biochemical properties of soil, including the activity of dehydrogenases, catalase, urease, acid phosphatase, alkaline phosphatase, &beta;-glucosidase and arylsulfatase. In more contaminated soil (600 mg Zn<sup>2+</sup>/kg), the negative consequences of zinc pollution were effectively mitigated only by cellulose, barley straw and manure. Cellulose had the highest soil restoration potential, as demonstrated by resistance indicator values for different enzymes. Cellulose, compost, manure and straw increased the resistance of white mustard plants to zinc, but only in treatments contaminated with 300 mg Zn<sup>2+</sup>/kg. Bark and sawdust potentiated zinc toxic effects on mustard plants.


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