Soil degradation frocesses in Moldova and monitoring perspective
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631.458(478) (3)
Soil science. Pedology. Soil research (716)
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POPOV, Leonid. Soil degradation frocesses in Moldova and monitoring perspective. In: Cercetarea şi gestionarea resurselor de sol”, conferinţă ştiinţifică cu participare internaţională, Ed. Editia 1, 8-9 septembrie 2017, Chişinău. Chişinău: Centrul Editorial-Poligrafic al USM, 2017, pp. 384-393. ISBN 978-9975-71-931-5..
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Cercetarea şi gestionarea resurselor de sol”, conferinţă ştiinţifică cu participare internaţională 2017
Conferința "Cercetarea şi gestionarea resurselor de sol”, conferinţă ştiinţifică cu participare internaţională"
Editia 1, Chişinău, Moldova, 8-9 septembrie 2017

Soil degradation frocesses in Moldova and monitoring perspective

CZU: 631.458(478)

Pag. 384-393

Popov Leonid
 
Institute of Soil Science, Agrochemistry and Soil Protection” Nicolae Dimo”
 
 
Disponibil în IBN: 28 august 2023


Rezumat

The Republic of Moldova is endowed with fertile soils. Soil pollu- tion is a major concern since no effective treatment method exists to restore the natural qualities of the soils. Polluted soil can only be rehabilitated under the long-lasting influ- ence of natural factors. A major source of anthropic impact on soils is the application of fertilizers and pesticides in agriculture. At the same time, manure and livestock excreta often are transported to communal dump sites, where they are mixed with other wastes, or are left in ravines, along the local roads and in other unauthorized places. Instead of improv- ing the soil productivity the nutrients find their way to and pollute the surface and ground waters. At the same time, pollution of the soils in the vicinity of former pes- ticide storehouses remains a problem. More than 200 storehouses have been dismantled during the last years and some of the remain- ing are in a poor condition, unfenced, unguarded, without doors and Windows, thus being sources of Chemical pollution. Moldovan soils are prone to erosion and this is how agrochemicals can travel to the water enviroriment thus endangering water life and limiting water uses. Investigations found HCH and DDT residuals in bottom sediments from several reservoirs and lakes as well as the main rivers, Nistru and Prut (concentrations ranged between 0.2 and 15.8 ppb). The concentration of PCBs in the topsoil coilected beneath the ca- pacitors battery at the Vulcăneşti substation reached a level of 7100 ppm which is exceeding the MAC by five orders of magnitude (!). With no exception, allowable concentrations of PCBs in soil were exceeded also on the territory of other investigated substations, with peaks registered at the Briceni substation (2545 ppm) and the Orhei substation (1959 ppm). The degradation of soils implies the reduction or total loss of their biologic or economic productivity caused by anthropic or natural processes.

Cuvinte-cheie
soil degradation, erosion, contamination