BIOTESTING OF AGRICULTURAL LANDSCAPE SOILS WITH INTENSIVE AEROTECHNOGENIC INFLUENCE

Abstract

On the basis of biotesting using test cultures of oats (Avena sativa L.) and peas (Pisum sativum L.), an integral assessment of the anthropogenic impact on the soil at different distances from the source of pollution was carried out. The aim is to characterize the phytotoxicity of soils of the agricultural landscape with an intensive level of aerotechnogenic load in Karelia. The object of the study was peat soils on fallow reclaimed agricultural lands in the zone of influence of industrial mining production of crushed stone from gabbro-diabases. In the course of research, it was found that at a very high level of average daily dust load (100 m – 2101.9 mg/(m2* day.); 200 – 1787,4; 300 – 1187,1 mg / (m2 * day)) there is a transformation of soil properties of the drained agricultural landscape near the mining quarry. The high content of nutrients, the slightly acidic reaction of the soil solution with a moderately dangerous total level of soil contamination caused the stimulation of the growth of test crops during biotesting (peas - by 58% and oats - by 41%). Inhibition of the development of seedlings for the studied samples is weakly expressed. As we move away from the quarry, despite a statistically significant decrease in the dust mass, the spatial gradient of changes in the analyzed indicators of peas and oats in the sample areas was not detected, which confirms the previously identified, the same level of aerotechnogenic impact on the soil cover.