Abstract
Studies have been carried out with the identification of criteria for the anthropogenic stability of agro-gray forest soils according to the main indicators of biological activity under conditions of intensive farming. Soils of this type are dominant in the soil cover of the Republic of Tatarstan, so the results of the experiment can be widely interpolated to similar conditions of soil formation and serve as quickly defined markers for diagnosing anthropogenic pressure. Studies have been carried out in field crop rotation since 1992, using various doses of potassium at three levels of soil nitrogen supply. As a result of long-term use of fertilizers, changes in microbiological activity have been revealed, in the variant with the use of environmentally balanced doses of mineral nutrition, an increase in microorganisms from 3,400 thousand (control) to 4,000 thousand per 1 g of soil is observed. A subsequent increase in the dose of fertilizers led to a decrease in the number of microorganisms relative to the control. Under the influence of the optimal combination of fertilizers (option 3), conditions for the development of actinomycetes, ammonifiers, nitrifiers, cellulose-decomposing bacteria are improved, while very high doses of mineral fertilizers (N180P60K200) worsen them, indicating a decrease in the activity of beneficial bacterial microflora. This leads to a slowdown in decomposition of fiber, nitrification and other biochemical processes. Indicators of the biological activity of the soil correlate among themselves, as well as with other indicators of its fertility, with the productivity of crop rotation and therefore can serve as an additional diagnostic sign when assessing the anthropogenic stability of the agricultural soil of the agricultural soil in intensive agriculture.
Highlights
The problem of soil and ecosystem resistance to various types of anthropogenic impacts is one of the fundamental problems of modern natural science, including soil science
In order to assess the anthropogenic soil stability in intensive agriculture, after completing the 4th rotation of the crop rotation, we studied the biological state of of agro-gray soil in some variants: control and experiment options with varying degrees of fertilizer saturation
Based on the research we can draw the following conclusions: 1. Prolonged use of mineral fertilizers in environmentally balanced doses increases the biological activity of the soil and ensures high productivity of crop rotation
Summary
The problem of soil and ecosystem resistance to various types of anthropogenic impacts is one of the fundamental problems of modern natural science, including soil science. According to a number of researchers, the intensive processing and use of agrochemicals, including mineral fertilizers, contributes to destabilization of the humus state of soils and reduce their environmental sustainability [3,4,5,6]. The assessment of anthropogenic stability of forest soil agro-grasses in intensive farming by changing the indicators of its biological activity with long-term intensive use of mineral fertilizers has been conducted for the first time in the stationary field experiment in Antilles, the Republic of Tatarstan. In order to assess the anthropogenic soil stability in intensive agriculture, after completing the 4th rotation of the crop rotation (after 20 years), we studied the biological state of of agro-gray soil in some variants: control (without fertilizers) and experiment options with varying degrees of fertilizer saturation. A further increase in the dose of fertilizers (N180P60K200) negatively affected the number of microorganisms and in the soil of this option, they became less prominent relative to the control (see table 1)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
