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

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. For mycorrhizal colonization of Festuca rubra plant, climatic factors play a small role, from this consideration is necessary to identify the dose and type of fertilizer to ensure the stability in time of colonization parameters. To study the effect of increasing soil nutrient resources on the mycorrhizal colonization parameters in Festuca rubra, we set up an experiment with six degrees of fertilization, in addition to unfertilized control were applied to two types of organic fertilization and three types of mineral fertilization. Balancing the colonization and reducing fluctuations in time of colonization parameters is influenced in a high degree by nitrogen, whether it comes from manure or synthetic fertilizers. At the end of growing season it is observed the superiority of combined fertilizers  ( manure + NPK or Eurofertil mezocalc supplemented with nitrogen) , which ensure the highest values of the colonization degree.