MICROELEMENTS (Cu, Mo, Zn, Mn, Fe) IN CORN GRAIN ACCORDING TO THEIR AVAILABILITY IN THE FALLOW SOD-PODZOLIC SOIL PROFILE

Aliya R. Bahitova, Vsevolod M. Lapushkin, Yuriy I. Enakiev

Abstract: It is necessary to use micro-fertilizers in growing crops due to several reasons: use of high-yielding hybrids, whose increased yield may decrease the content of microelements in the productive mass; improved grain quality; increased resistance to disease and adverse factors; balanced nutrition of plants and enrichment of crop production with microelements. When growing plants in sod-podzolic soils, it is necessary to take into account the specific chemical composition of these soils: increased acidity, lack of calcium, phosphorus, potassium, sodium, cobalt, copper, iodine, boron; sufficient amount and, sometimes, excess of manganese and zinc; relatively high content of strontium. In these soils, many cultivated plants lack calcium, potassium, phosphorus, copper, boron. In addition, sod-podzolic soils may differ in the content of certain trace elements and their combination. The number of nutrients also varies within the same soil profile. The standard method of agrochemical soil survey, based on averaged samples for large areas, does not take into account the differences in the number of microelements in different soil layers or their availability to plants. Taking into account the peculiarities of the distribution of microelement forms available to plants in the soil profi le, it is possible to adjust the combinations of macro and micronutrients in such a way so as to obtain crops rich in microelements contributing at the same time to soil fertility conservation.

Keywords: copper; enrichment; grain; iron; manganese; micro-fertilizers; microelements; molybdenum; sod-podzolic soil; zinc

Date published: 2018-05-04