Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Andrei MOŢ, Violeta Alexandra ION, Liliana BĂDULESCU, Roxana MADJAR, Roxana CICEOI
Carbon and nitrogen are two of the most important elements found in soil structure and the relationship between them has a special relevance on soil characterization. This relationship is known as carbon-nitrogen ratio (C/N ratio) and indicates the rate of decomposition of organic matter. Degradation of organic matter will certainly modify the C/N ratio, and this modification is related to the existing microorganisms in soil. The present study follows the evolution of the C:N ratio in a calcaric alluvial soil from Buzau county used for organic tomato cultivation and subjected to a microbial treatment based on Beauveria bassiana inoculants. The experimental scheme includes three variants: (1) untreated soil, uncultivated (control); (2) untreated soil, cultivated with Florina 44 tomato variety; (3) soil treated with microbial inoculants, cultivated with Florina 44 tomato variety. Each variant was observed on two different lots and in two moments (autumn 2019 and autumn 2020). The soil samples were taken from topsoil, dried at room temperature, and analysed using the CHNS elemental analyser for C and N determinations. Regarding the C:N ratio, the results pointed out that there are some differences that correlate with the use of microbial inoculants in tested variants.
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