Journal of fundamental
applied researches

The dynamics of humic substances content in experiments

2017. 1, pp. 29-36

Pilipko Ye.N. - Ph.D. (Biology), Associate Professor, Vereshchagin Vologda State Dairy Farming Academy, 2 Shmidt Str., Molochnoye, Vologda, 160555, Russian Federation,

The dynamics of humus substances studied through 3 factorial experiments and the resulting mathematical regression equations has been considered in the article. The experiments were taken with microlysimeter on the substrate having different size of particles - loams and loamy sands. The excreta of the elk (Alces alces L. ) (Ex) which is the largest phytophagous animal of the north-west have been chosen as organic substances for the experiment. The other two factors are moisture (watering) (Pol) and decomposition time (Vr) . We used two kinds of excreta: summer and winter ones. Different properties of excreta are due to the seasonal nutrition of the animal. The object of the research was the dynamics in the content of some humus substances - carbon of humic and fulvic acids. As a result of the research a more intensive excreta decomposition on loamy sands has been revealed. Of the two kinds of excreta summer ones were decomposing faster and more effectively due to the fact that in summer the elk mostly consumes soft green feeds while hardly decomposing winter excreta appear as a result of metabolic changes in coarse woody feeds. Regression equations allowed us not only to find out which factor is the most influential but also to follow the impact of the factors in their interaction. We presented the interactions of the factors giving the most significant (maximum) increase or decrease in carbon of humic and fulvic acids as a result of excreta decomposition.

Key words: , , , , - , (Alces alces L.), , , , , humus substances, carbon of humic and fulvic acids, dynamics, excre