Mycorrhizal Colonization in Festuca Rubra under the Influence of Climatic Factors and Differentiated Fertilization

Vlad Stoian, Roxana Vidican, Ioan Rotar, Florin Păcurar

Abstract


Intensification of natural ecosystems may be beneficial for a series of plants, which are favored to become the dominant at the level of grass cover. However, no matter how low would be the inputs applied, the first effects are observed in the symbiotic organisms of existing plants in the ecosystem. Adaptation of plants and soil microorganisms to environmental conditions have made the type and dosage of fertilizer applied to become factors with limiting effect on the balanced evolution of mycorrhizal fungi. Climatic factors have a significant influence on mycorrhizal colonization parameters at the level of the first sequence of vegetation; this influence becomes insignificant after installing mulch on experimental variants. Application of organic fertilizer influence in a positive way mycorrhizal colonization parameters, but only during the first sequence of vegetation. After installing mulch, the phenomenon is reversed, excelling fertilizers containing chemical nitrogen and manure fertilization becomes unfavorable for mycorrhizal colonization. Stability in time of colonization is influenced in the highest degree by the level of the chemical nitrogen and combination of this element with phosphorus and potassium prevails in establishing the evolutionary limits of colonization.


Keywords


mycorrhizal colonization, colonization degree, organic fertilization, mineral fertilization, fertilization dose, vegetation sequence

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