The article considers the existing approaches to the management of environmental risks in agricultural production. It is noted that in order to minimize environmental risks in agrocenoses and improve environmental safety in agroecosystems, it is necessary to assess the consequences of the impact of agricultural activities on agrocenoses. Therefore, the purpose of the study is to summarize the main environmental risks in agrocenoses and determine levers of environmental risks managent to minimize their negative impact in agricultural production and improve the safety of agroecosystems. It is shown that in order to control the consequences of environmental risks, it is important to develop an algorithm for the process of managing environmental risks in agrocenoses throughout the crop cycle. The fundamental principles of this process include studying the main factors of environmental risks for growing crops and developing a list of environmental risks in agrocenoses; identification of the main levers of environmental risk management in agrocenoses, which include recommendations for the use of optimal measures in agricultural production to prevent or minimize environmental risks. The list of main environmental risks in agrocenoses is proposed, which summarizes the sources of their occurrence and the consequences for agrocenosis. The main environmental risks in agrocenoses include climate change, soil degradation, anthropogenic soil pollution, changing of the optimal ratio of land used in agriculture, unsatisfactory phytosanitary condition of crops. The main levers of environmental risk management in agrocenoses are identified and priority measures are given to prevent the negative consequences of the effects of biotic and abiotic factors on agrocenoses. It is noted that the development of new methodological approaches to the management of environmental risks will minimize their impact on agrocenoses and improve the safety of agroecosystems.
The article is devoted to the development of methodical approaches to the management of environmental risks due to pesticide contamination of agrocenoses. An assessment of ecological risks due to the use of pesticides was carried out at the scientific research field of the Skvirskaya research station of organic production of the IAP of the National Academy of Sciences during the growing seasons of 2019-2021. The methods of assessing the ecological risks of potential pesticide contamination of agrocenoses based on the indicators of the agroecotoxicological index (AETI) and the ecotoxic impact of harmful substances (E) were used on the natural environment. It was shown that the level of environmental risk due to the use of pesticides in the research field of the station according to the weighted average indices (AETI) is characterized as low -risk, and the environmental risk due to the pesticides using is minimal. According to indicators of ecotoxicity (E), the pesticides that were used are characterized as having a low potential ecotoxic risk of impact on agrocenoses of cultivated plants. However, the total pesticide ecotoxicological load (Σ Е = 0.425 compared to the standard E DDT = 1) indicates the possibility of disruption of ecological connectivities in the agroecosystem. One of the elements of environmental risk management can be the assessment of the pesticide load on agroecosystems and considering of the territory ability to self-clean. In order to minimize the environmental risks of pesticide contamination of agrocenoses, measures should be taken to regulate the use of chemical plant protection agents. This can be done by banning or limiting the use of pesticides that have a high level of ecotoxicity and are persistent in the soil. This will contribute to increasing the ecological safety of agro-ecosystems and the natural environment.
The study of environmental risks in the agricultural industry in the conditions of global climate change remains relevant. The role of abiotic factors (air temperature and precipitation) in the formation of environmental risks in agrocenoses of agricultural crops is covered in the article. The influence of uncontrolled fluctuations of agroclimatic factors on agrocenoses, which cause environmental risks, is particularly hazardous. They are the main prerequisite for reducing the efficiency of agriculture. The aim of the work was to develop and substantiate the criteria for evaluating ecological risks in agrocenoses under the influence of abiotic agroclimatic factors in the conditions of climate change. The defined criteria provide an assessment of the ecological risks of loss of fertility and reduction of soil quality, deterioration of the phytosanitary condition of agrocenoses, and reduction of their productivity. Such criteria include indicators of the content of organic matter and the coefficient of soil dehumification, which indicate a decrease in the share of organic matter in the soil; agrochemical indicators that confirm the risks of loss of macro- and microelements, changes in soil pH; normative indicators of the content of pollutants, which determine the level of ecological risks of soil contamination with dangerous compounds of heavy metals, pesticides and radionuclides. The criteria that determine the phytosanitary state of agrocenoses, determine the indicators of weediness, plant diseases that lead to death or thinning, an increase in the number of species of harmful organisms, and an approximate economic threshold of the harmfulness of pests. It characterizes the degree of damage to crops and possible crop losses. Ecological risks of agrocenoses productivity loss are determined by criteria for assessing crop loss from major diseases and indicators of quality and safety of agricultural products. The use of the specified criteria will ensure the timely elimination of the environmental risks outlined in the article thanks to the implementation of appropriate agrotechnical preventive and protective measures, will guarantee the growth of the productivity of agrocenoses and the ecological safety of agroecosystems.
The relevance and scientific and methodological approaches to the use of the bioindication method for assessing environmental risks in agrocenoses contaminated with toxic substances (in particular, heavy metals) were substantiated in the article. The study is based on the use of bee honey and heavy metal transfer coefficients in the sequential chain "soil -honey plant -bee honey". This ensures control over the content of toxicants in the soil and inflorescences of honey plants. Toxicant transfer coefficients can be used in the soil-plant-beekeeping products chain as indicators for developing environmental risk management tools. Bioindication is important for contaminated agricultural landscapes that are used as raw materials and forage lands for beekeeping and other environmental objects. The use of the bioindication method makes it possible to assess the environmental risks of toxic substance pollution of agroecosystems and natural biocenoses and to outline the boundaries of toxicant pollution of a certain area for the safe placement of apiaries and obtaining high-quality bee honey.
The Concept of Rehabilitation of Contaminated Soils has been developed, which substantiates the ways to restore areas contaminated with persistent organic pesticides. The practical implementation of the Concept will contribute to the transfer of existing land use systems to the principles of sustainable agricultural development, as well as the preservation, reproduction and expansion of biodiversity, as well as improving the environmental safety of agro-ecosystems for sustainable development of the Agrosphere. The Concept combines ways of practical implementation of environmentally friendly methods of cleaning pesticide-contaminated areas and further use of rehabilitated land in the process of agricultural activity in Ukraine. The problem of pesticide pollution of agroecosystems is proposed to be solved by using scientifically sound ecologically safe methods of soil remediation with multicomponent pesticide pollution developed at the Institute of Agroecology and Environmental Management of NAAS, in particular using bioremediation methods. The following are proposed for use: methods of agroecological monitoring of areas contaminated with persistent organic pollutants, methods of phytotesting and phytoremediation of soils contaminated with resistant pesticides. For phytoremediation of contaminated soils, it is proposed to use annual cultivated (barley, wheat, beans, soybeans, zucchini, pumpkin) and wild (dandelion, bitter wormwood, common wormwood, wheatgrass) species of plant-mediators, which are suitable for phytostabilation and in the conditions of multicomponent soil pollution. The main stages of the Concept implementation are: complex agroecological monitoring of soils contaminated with residues of persistent organic pollutants (POPs); comprehensive ecotoxicological assessment of soil condition; determining the degree of chemical degradation of soils; adaptation of remediation technologies to the specifics of the area in need of cleaning; introduction of ecologically safe remediation methods into practical use; realization of prospects of further use of rehabilitated soils in various branches of agriculture; taking into account the ecological and economic efficiency of the use of remediation methods. Possibility and ways of using restored areas in the process of agricultural activity, taking into account the main stages of implementation of the Concept are set out in the developed in the Institute of Agroecology and Environmental Management of NAAS «Scientific and methodological recommendations for restoration of soil contaminated with organochlorine pesticides depending on their toxicity» and «Scientific and methodological recommendations for the use of restored areas in the process of agricultural activity».
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