Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 1
Written by Alexandra GHEORGHIȚĂ, Larisa CORCOZ, Bianca POP, Anca PLEȘA, Vlad STOIAN, Roxana VIDICAN
The decomposition of organic matter plays an important role in the release and cycling of nutrients in agricultural soils. The use of 30-day decomposing straw technique, instead of the soil substrate itself, was chosen to highlight the microbial community involved in the decomposition of soil organic matter. EcoPlate (Biolog) readings were used to record daily changes in functional guilds. Dynamics of the Biolog EcoPlate showed the fluctuations within the functional microbial community active in the decomposition process. Both functional guilds presented a differentiated pattern over time. This functional analysis allows a better understanding microbial ability to break down and utilize the available compounds, underline their adaptability and metabolic diversity. The sum of activities recorded was more than 350% increase in NPK-amended variants. AWCD revealed a daily change in the performance of decomposing microbiomes with more than 525% increase in the same variants. Polymers, CH and AM guilds presented increases of over 400%. The interaction of microorganisms with organic matter is visible in the specific dynamics of functional microbiomes.
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