PRACTICAL ASPECTS OF THE USE OF BIOFERTILIZER "VESNA" AS A FACTOR OF PROTECTION OF SOIL FERTILITY

The article is devoted to the study of the effect of biofertilizers on the number of different groups of soil microarthropods of chernozem of ordinary agrocenosis of perennial grasses in the condi-tions of the Lower Don. Most groups of mites and collembolus on the agrocenosis of perennial grasses, being saprophages by the nature of nutrition, undoubtedly play an important role in the circulation of substances, indirectly affecting the productivity of the agrocenosis. It was found that when applying the biofertilizer "Vesna", the number of all groups of microarthropods at the exper-imental site exceeded the control indicators by 1.5 times. All groups of ticks showed a large num-ber, gamase and shell ticks prevailed. The number of leg-tails was less than the number of ticks in the experimental area, but it turned out to be higher than the number of leg-tails in the control ar-ea. The vertical distribution of microarthropods in the horizon of 0-20 cm of the chernozem of the ordinary agrocenosis of perennial grasses was characterized by an uneven distribution: basically all groups of ticks and longtails are concentrated in the horizon of 0-10 cm, which is determined by the gradient of hydrothermal conditions and the distribution of root systems of plants of agro-cenosis.