THE IMPACT OF PERENNIAL LOLIUM ON THE BIODIVERSITY AND THE STRUCTURE OF THE GRASSLANDS.

The aim of the paper is to highlight the role of natural germoplasm resource of the species Lolium perenne by adapting it to a wide variety of abiotic conditions. The impact of the presence of the species together with other legume species such as Trifolium repens in the construction of multifunctional temperate climate associations is also studied. The concept of meadow multifunctionality has developed with the reconsideration of their sustainability character in terms of an emphasis on the negative impact on the environment. Land use change in recent decades, the abandonment of grazing and the decline of traditional agricultural practices or afforestation are a major threat to biodiversity. Often the bispecific dominance between Lolium perenne and Trifolium repens is improve both feed quality and soil quality due to the added value of fixing atmospheric nitrogen. The species of Lolium perenne due to its high ecological plasticity is thus considered to be particularly important especially due to the fact that it covers a wide range of environmental conditions thus developing models of great genetic diversity which leads to a development of genomic resources. Lolium perenne is thus adapted to defoliation, fertilization and growth cycles, which is particularly important because defoliation through animal grazing can have major effects on the structure and functioning of grassland ecosystems affecting the production of shoots and root rotation of communities. of plants, but also photosynthetic rates and carbon allocation in plants: energy flow in the plant-soil system. Thus, the highlighting of the qualities of Lolium perenne species are important premises for the genetic progress of this species but especially for understanding the natural functioning of plant associations dominated by it, which leads to environmentally friendly management practices. [ABSTRACT FROM AUTHOR]