THE CONTENT OF MICROELEMENTS IN CHERNOZEM OF A STEPPE ZONE OF UKRAINE AND THEIR CHANGE AT THE PROLONGED USE OF FERTILIZERS IN A CROP ROTATION

Abstract

Change of the content of microelements in chernozem of a steppe zone of Ukraine at the prolonged use of fertilizers in crop rotations is studied. It is established that the gross and acid forms of microelements are characterized by stability of indexes, although trend is marked of increasing Mn in gross plowing and subarable soil layers and gross Zn - in subarable at the typical chernozem. The content of the acid soluble forms Zn, Cu, Co, Ni, Pb in a subarable layer of soil was decreased against the background of elevated and high doses of mineral fertilizers. The reliable increase of Mn mobility in the plowing layer of the typical chernozem was established. Mobility of Zn, Mn and Cu was decreased on the ordinary chernozem at plowing straw. MAC excess of total and mobile forms of microelements in chernozem of the region wasn't established.