Daily dynamics of cellulase activity in arable soils depending on management practices

The daily dynamics of cellulase activity was studied during 27 days by the cellophane membrane method on soils managed using the conventional high-input farming system (application of mineral fertilizers and pesticides) and the biological conservation farming system (application of organic fertilizers alone) in a microfield experiment. The regular oscillatory dynamics of the cellulase activity were revealed and confirmed by the harmonic (Fourier) analysis. The oscillatory dynamics of the cellulase activity had a self-oscillatory nature and was not directly caused by the disturbing impacts of both the uncontrolled (natural) changes in the temperature and moisture (rainfall) and the controlled ones (the application of different fertilizers). The disturbing impacts affected the oscillation amplitude of the cellulase activity but not the frequency (periods) of the oscillations. The periodic oscillations of the cellulase activity were more significant in the soil under the high-input management compared to the soil under the biological farming syste

Structur e and Functioning of Micr obial Community of Mineral Springs in Central Asia

The microbial mats of dif ferent types of springs in Central Asia (Zabaikalye and Mongolia) are described. The species diversity of mat-formed phototrophic bacteria was determined. The rates of microbial destruction processes (sulfate reduction and methane formation) were measured. An important role of bacteria and algae in the formation of mineral water composition was shown

Hydr ochemical Characteristics of Selenge River and its Tributaries on the Territory of Mongolia

Hydrochemical research of the Selenge and its main tributary the Orkhon river on the territory of Mongolia has been conducted. Concentrations of the main water ions were measured. Distribution of heavy metals was determined. Dynamics of biogenic elements (NO 3 - , NH 4 + , phosphates) and degree of phenol pollution was determined

Daily dynamics of cellulase activity in arable soils depending on management practices

The daily dynamics of cellulase activity was studied during 27 days by the cellophane membrane method on soils managed using the conventional high-input farming system (application of mineral fertilizers and pesticides) and the biological conservation farming system (application of organic fertilizers alone) in a microfield experiment. The regular oscillatory dynamics of the cellulase activity were revealed and confirmed by the harmonic (Fourier) analysis. The oscillatory dynamics of the cellulase activity had a self-oscillatory nature and was not directly caused by the disturbing impacts of both the uncontrolled (natural) changes in the temperature and moisture (rainfall) and the controlled ones (the application of different fertilizers). The disturbing impacts affected the oscillation amplitude of the cellulase activity but not the frequency (periods) of the oscillations. The periodic oscillations of the cellulase activity were more significant in the soil under the high-input management compared to the soil under the biological farming syste