Evaluation of remediation efficiency of manganese quarry lands after open-cut mining: ecosystem approach

Abstract

Purpose. To assess the quality of remediated lands of Ordzhonikidzevskyi manganese quarry (Oleksandrivskyi career) on the possibility of their economic use and suitability for soil biota existence, as well as providing recommendations for further rational economic use of them. Methodology. Assessment of quality of remediation lands was carried out by comparing remediated soil bonitet with bonitet of zonal (native) soil. Data collection and processing were carried out in terms of fill layer thickness, humus content in filling top layer, content of physical clay in topsoil and subsoil, granulometric composition of onemeter thick fill layer, topsoil and subsoil salinity (rate), composition and properties of underlying rocks. findings. The research revealed that as a result of implementation of technical remediation stage, a remediated soil was obtained with properties similar to zonal (native) soil previously located within this area prior to mining, and although it has less fertility and greater salinity of deeper layers, it can be used in agricultural purposes after implementation of a biological stage of remediation, which consists of salt-tolerant perennial grass cultivation for 3-5 years. The method of land remediation is currently generalized and well-studied; however, in most rehabilitation schemes on ecological recovery of industry-related areas, completeness of naturalization and functioning of remediated ecosystems is not taken into account, since most of the remediation measures are focused only on vegetation and ground macro-fauna well-being Originality. Novelty of the work is that when assessing the remediation quality, it is proposed to take into account environmental conditions for existence of soil invertebrates, which will play a crucial role in formation of agro-system stability mechanism. These animals make a significant environmental contribution to transformation of soil features, acting as a soil protecting biological factor in organic farming. Practical value. The performed scientific work is part of solution of modern integral ecological task on providing a human with a set of material and intangible services-natural resources and healthy environments.

The influence of Cameraria ohridella (Lepidoptera, Gracillariidae) on the activity of the enzymatic antioxidant system of protection of the assimilating organs of Aesculus hippocastanum in an urbogenic environment

“…Study area. The research was conducted in 2018 in the city of Dnipro, Northern Ukrainian steppe (Kulbachko et al, 2015;Baranovski et al, 2016;Didur et al, 2018;Loza et al, 2018;Lykholat et al, 2018). The city is located in a zone of temperate latitudes with a rather active atmospheric circulation (the air masses predominantly moving from east to west).…”

The effect of soil and climatic conditions on the distribution of nutrients in Actinidia arguta leaves

“…The study of the ecology of nutrients is now becoming increasingly important, since it is known that in different soils mineral compounds are almost never found in such quantities and in such balanced proportions that would be optimal for growth and development of plants (Zaimenko, 2008;Jankowski et al, 2018aJankowski et al, , 2018bLoza et al, 2018;Lykholat et al, 2018). The latter always compensate for the negative effects of the environmental stress factors by triggering adaptive changes in the plant nutrition and other physiological processes (Zaimenko, 2019).…”

Дослідження Фізико-Хімічних Та Агрохімічних Властивостей Ґрунту Рекультивованих Територій Порушених Видобутком Ільменіту

“…Це призводить до утворення ґрунтів з різним ступенем опідзолення, де елювіальні горизонти бідні на вміст колоїдів, обмінних основ, зокрема Са 2+ , в деякій мірі збагачені кремнеземом. Ці ґрунти характеризуються підвищеною кислотністю та несприятливими фізико-механічними властивостями [6,7].…”