The balance of grassland ecosystems in Romania is constantly under strong pressure due to the socio-economic aspect that created the premise either of abandonment or intensification of these areas, leading to the increasing occurrence of nutritional perturbations and unidirectional allocation of resources to the dominant plants in the sward. Mycorrhizal fungi have the ability to adjust the transfer processes of nutrients between plants, maintaining the balance of the sward. This study aims to assess the reaction of mycorrhizas in the root system of Festuca rubra L. and Trifolium repens L. plants at fertilization and management. Mowing or mulching are traditional solutions to maintain the mycorrhizal nutrition area of dominant plants in the sward. The application of zinc sulphate or fungicide is a coherent alternative to preserve the stability of grassland ecosystems in the absence of these management types.

mycorrhizal colonization, fertilization, management, nutritional disturbances

Presentation: oral