CONTENT OF MICROELEMENTS AND LABILE ORGANIC MATTER IN STRUCTURAL AGGREGATES FOR DIFFERENT TYPE OF USE

Abstract

Established that the typical heavy loam chernozem of the state facility «Experimental farm Grakovskoe» has high structural parameters, which can be traced both in the content of the sum of agronomically valuable aggregates (0,25-10,0 mm) and in the sum of the most valuable structural particles (1,0-7,0 mm). The redistribution of fractions along the soil profile up to the layer of 20-40 cm has been established on the soils of the deposit and forest belts, and on the fertilized version and control - the redistribution of fine fractions (<1 mm) with an increase in their content in the soil layer of 10-20 cm. The largest content of labile organic matter characterized by fertilized soil, the least - the deposit. It was established that the distribution of the labile organic matter is the same on the deposit soil and at the control in all layers and in the fertilized soil, in the forest belt in the 0-10 cm layer its content is higher in the most valuable structural aggregates, and in the 10-20 cm layer and 20-40 cm - in the dusty fraction. It has been established that soil dispersion occurs on the fertilized chernozem. The patterns of distribution of microelements in individual structural fractions are revealed. It has been established that trace elements are mainly contained in the most valuable structural aggregates, but there are some exceptions: on the fertilized soil content of copper in all investigated soil layers is higher in the dusty fraction, like zinc, in the 20-40 cm layer. The largest manganese content on the soils of the deposit in the dusty fraction, and copper in the soils of the forest belts in the lumpy fraction - for all investigated soil layers.