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HUMUS SUBSTANCES AND SOIL FERTILITY

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Author(s): Cecilia Violeta NEAGU | Georgeta OPREA

Journal: Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development
ISSN 2284-7995

Volume: 12;
Issue: 1;
Start page: 153;
Date: 2012;
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Keywords: alluvium soil | softness | humus substances | total carbon | humus carbon | extractable carbon

ABSTRACT
The humus substances play an important role in obtaining high yields and stable over time. He is permanently double process: the humus improvement of organic material reaching the soil and the mineralization of components at different stages of humus improving, The results of this process is influenced by soil type, climate, irrigation, fertilization. The beneficial effect of humus substances on plant growth may be related to indirect effects (fertilization efficiency or reduce soil compaction) or direct (overall improvement in plant biomass). Factors influencing the humus improving are: climate, biological, pedological, that cultural and technological factors: plant debris, C/N of debris, application of organic and mineral fertilizers and herbicides absorption on humus substrates.Mineralization of soil organic matter, humus substances is thus favourably influenced by mineral fertilization. In this paper we studied the effect of fertilizers on soil humus (Ct), organic matter humus improved (Ce), the carbon content of humus acids (HFA). The interpretation of results was observed that the intensity of nitrification is influenced by humus substances existing total.
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