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Daily dynamics of cellulase activity in arable soils depending on management practices |
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| Authors: | E V Lavrent’eva A M Semenov V V Zelenev Yu Chzhun E V Semenova V M Semenov B B Namsaraev A H C Van Bruggen |
| Institution: | (1) Institute of General and Experimental Biology, Siberian Branch, Russian Academy of Sciences, ul. Sakhyanovoi 6, Ulan-Ude, 670047, Russia;(2) Biological Faculty, Moscow State University, Moscow, 119991, Russia;(3) Institute of Physicochemical and Biological Problems of Soil Science, Russian Academy of Sciences, ul. Institutskaya 2, Pushchino, Moscow oblast, 142290, Russia;(4) Group Biological Farming Systems, Wageningen University, Marijkeweg 22, Wageningen, 6709 PG, the Netherlands |
| Abstract: | 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 system. |
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