COMPARATIVE ASSESSMENT OF VARIOUS INTENSITY AGROECOSYSTEM ENERGY CONSUMPTION DURING SODDY PODZOLIC SOIL USAGE

Abstract

The energy consumption of different intensities agroecosystems with prolonged usage (> 100 years) of soddy podzolic soil was studied. It was found that the minimum content of humus energy and biophile elements is characteristic for degraded agroecosystems (1094 thousand of MJ / ha), and the maximum – for super-intense (1849 thousand of MJ / ha). In intensive and super intensive agroecosystem manure and mineral fertilizers (24.17 thousand of MJ / ha) make a significant contribution to the energy potential of the soil, and crop and root residues (98.8 thousand of MJ / ha) make a compromise. It is proved that the annual energy loss due to the mineralization of organic matter increases with increasing anthropogenic impact on the soil and amounts to: in compromise agroecosystems - 9.7 thousand of MJ / ha; in super-intensive and intensive - 26.0 ... 31.3, and in degraded - 33.9 thousand of MJ / ha. The maximum total decrease in the energy potential of the soil over a 102-year observation period is characterized for degraded -42% and extensive -10% agroecosystems. The additional revenues of energy with organic and mineral fertilizers increases the energy intensity of the intensively used argolandscape to the level of a compromise, and super-intensive increases it by another 23%.