Abstract
The problem of maintaining the sanitary function of soils of agroecosystems is one of the main ones, since it determines the danger for reproduction of various types of microorganisms, including human and animal pathogens. Within the study, the authors assessed the number of bacteria (Salmonella enterica and Escherichia coli) in samples of chernozem with introduction of organic fertilizers. The dynamics of the number of Salmonella enterica shows that organic matter in soils contributes to a sharp decrease in their number at the initial stages of biological pollution, and in the long term it contributes to total loss. By the 60th day, Salmonella was found only in the control option of the experiment, but continuation of the experiment showed their total loss on the 80th day. Introduction of organic ameliorants into the chernozem samples led to a decrease in the number of E. coli by the 80th day, but their total loss was not noted.
Highlights
It is known that microorganisms in agricultural soils have a significant effect on the level of soil fertility, especially in terms of the availability of plant nutrients and suppression of pathogenic microflora carried by the soil [1]
The organic fertilizers taken for the experiments were characterized by a high content of organic matter, and the AgroVerm preparation was characterized by a sharply alkaline reaction of the medium
The results of the study led to several conclusions: 1. Introduction of organic fertilizers into the soil practically did not affect the pH of the soil solution, but led to an increase in the content of organic matter with addition of vermicompost to 7.5 %, and the soil conditioner to 8.2 %
Summary
It is known that microorganisms in agricultural soils have a significant effect on the level of soil fertility, especially in terms of the availability of plant nutrients and suppression of pathogenic microflora carried by the soil [1]. These key ecological soil functions will depend on critical constituents of the soil microbial community. The "health" of the soil can be defined in terms of its ability to counteract (suppress) pathogenic microflora – suppressiveness [2]. Marcos, who studied bacteria pathogenic for humans, transmitted through the soil are highlighted
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