Abstract:
The researches have focused on the behaviour of some species of
leguminous plants and perennial graminaceae and their influence plants on
the forage yield in complex mixtures.At the some time the authors have
analyzed the influence of the mixture and fertilization on the vegetal cover
structure.
From the mixtures under study, five were formed from six species, two
perennial leguminous plants and four perennial graminaceae, and the other
five mixtures were formed from seven species, from which two perennial
leguminous plants and five perennial graminaceae.
At the first five mixtures the perennial leguminous plants were
represented by Medicago sativa and Lotus corniculatus, and the other five
mixtures by Onobrychis viciifolia and Lotus corniculatus. The perennial
graminaceae used in the first five mixtures were Dactylis glomerata, Festuca
pratensis, Poa pratensis, Lolium perenne, and at the other five mixtures, the
same species of graminaceae were used to which Bromus inermis was added.
In the first year of vegetation the leguminous plant had the bigest
percentage in the vegetal cover structure for all the mixtures studied. At the
mixtures with Medicago sativa the leguminous plant has participated in the
vegetal cover between 85 % at the mixture were Medicago sativa has
participated with 60 % in the sowing norm and 73 % at the mixture with 20
% Medicago sativa.
At the mixtures with Onobrychis viciifolia the leguminous plant has
participated in the vegetal cover between 83 % at the mixture were
Onobrychis viciifolia has participated with 60 % in the sowing norm and 69
% at the mixture with 20 % Onobrychis viciifolia.
Within all mixtures, the changes in grass/legumes ratio have been
determined by each category percentage in the mixture, by temporary
meadow’s age species agresivity and less influenced by fertilization, either
vinassa, manure or mineral.
