In case of significant technogenic geochemical loads on agricultural landscapes, the issue of ecological forecasting of environmental management is particularly important. Scientific studies of this issue are aimed at establishing the critical values for the components of the ecosystem, the classification of technogenic sources of hazardous substances, levels of soil contamination. This study presents a research to determine the content of heavy metals in the soils of the Ryazan region (Russia) and analyzed the level of their pollution. In the experiments organic, organomineral and mineral fertilizers systems were studied. From 2002 to 2008 were conducted lysimetric experiments on detoxification of elevated pollution of sod-podzol sandy loam soil, and from 2006 to 2008 of podzolized black soil. The participation of the non-ferrous metals plant emissions was detected in the pollution of sod-podzol light in granulometric composition soils with copper of up to 80 mg·kg-1, when the average concentration of Cu in the soil was 38.8 ±6 mg·kg-1. Humification plays a significant role in the formation of soil, its most important properties and characteristics. The saturation of 1 hectare of sown area with organic was slightly different in the experiments, but the intensity of accumulation of humus from the various agrochemical means did not almost differ. The problem of adaptation of plants in the conditions of technogenic environment is of primary importance. Plants have three biobarera against the admission of toxicants, these are the soil – the root – the stem – the reproductive organs. Grain in contaminated soil is environmentally hazardous as the content of Pb is indicated at the level of 0.68, 1.17 mg·kg-1 (MPC 0.5), Cd – 0.27, 0.11 mg·kg-1 (MPC 0.1), Zn – 76 mg·kg-1 (50 MPC). Use of fertilizing systems had a mostly positive effect, but products do not always become environmentally friendly.
The Oka basin is characterized by serious environmental problems associated with the depletion of water resources. Communities of aquatic organisms are the first to respond to negative changes in the aquatic environment, such communities are used as indicators in biological monitoring. The aim of the work was to assess the ecological state of the small river of the Oka basin by bioindication. The quality of the water in the reservoir was assessed by chemical indicators - biogenic and technogenic elements. The saprobity index of the reservoir was determined by the species diversity of periphyton. The results revealed technogenic and organic pollution of the small river. According to the results of biological monitoring, the value of the saprobity index is 2.85, which corresponds to class 4 of the reservoir quality, and the water is assessed as polluted. Monitoring the degree of pollution of the small river by the biodiversity of the periphyton community allows you to determine the degree of water pollution quickly.
Environmental problems have not lost their relevance for the Non-Chernozem zone of Russia, the southern part of which belong to the Ryazan region, where in a number of areas there is a critical situation of cultural landscapes contamination of with heavy metals. The aim of the research was to assess the influence of multi-level heavy metal contamination of Retisols for the parameters of its phytotoxicity and the activity of soil enzymes. In the model experiment on Retisols, it was shown that the complex effect of heavy metals that are priority for the Ryazan region such as copper, zinc, lead, cadmium, at doses of 1.5 and 3.5 UEC (approximate permissible concentration) reduces the activity of soil enzymes and has a toxic effect on the cereal-legume mixture. In the variant of the experiment with heavy metal content of 0.5 UEC in the soil, the studied elements, mainly zinc and copper, act as chemi cal meliorants for Retisols depleted with trace elements. The combined effect of heavy metals (Cu, Zn, Pb, Cd) in doses of 1.5 and 4.5 UEC is phytotoxic what negatively affects the biometric indicators of the cereal-bean mixture, and also leads to accumulation in the biomass in quantities exceeding the permissible standards.
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