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Sown pastures in general and those sown with complex mixtures particularly, well adapted to some ecological conditions, through their multifunctional character can represent real alternatives to annual fodder cultures. In this paper are presented the results of an experiment that followed the behavior of eight complex mixtures of perennial fodder plants and a pure alfalfa culture, fertilized with three doses of fertilizers (N0; N60P70; N120P70 kg·ha-1). Between the two studied factors (mixture and fertilization), fresh matter yield at first cycle of harvest was significantly influenced only by mixture. The highest fresh matter yield at the first mowing was recorded by mixture five consisted of red clover and four poaceous species (Trifolium pratense, Dactylis glomerata, Festulolium, Phleum pratense, Lolium perenne). [ABSTRACT FROM AUTHOR]

The research objective consists in establishing the optimal mixtures of perennial grasses and forage legumes for providing a grass carpet resistant to hydrothermal stress and a high nutritional value. It has made observations on the behaviour of the grass mixture plants composed in different proportions under the stationary conditions from the mountain area. The grass species studied are: Dactylis glomerata, Phalaris arundinacea and Bromus inermis, and the legume species is Medicago sativa. The research is carrying out in the experimental fields of the Research- Development Institute for Grasslands Brasov, under specific field conditions in the south-east of Transylvania, the experiences being placed in 2018 and being in progress. The mixtures used are simple, consisting of one grass and one forage legume, in which the participation percentage of the grasses increases from 25 % to 100 %, and the proportion of the perennial forage legume representing the difference. Based on the chemical analysis and the data obtained in the laboratory are established optimal mixtures to provide resistance to hydrothermal stress in the experimental area, as well as from the similar areas by climate point of view. The aim of using these simple mixtures is that to obtain fodder with high nutritional qualities and a high production, under conditions of climate change. [ABSTRACT FROM AUTHOR]