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
analysed the influence of fertilization with mineral and organic fertilizers on
the species from the mixture and on the forage yield.
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.
At the mixture were Medicago sativa has participated with 60 % in the
sowing norm, the forage yield was about 4.37 t/ha d.m., at the mixture with
50 % Medicago sativa the yield was about 4.12 t/ha d.m. (94 %), and at the
mixture with 20 % Medicago sativa the yield has decreased to 3.19 t/ha d.m.
(73 %).
At the group of the mixtures were Medicago sativa was replaced with
Onobrychis viciifolia species and when Bromus inermis species was added to
the graminaceeae, the yields were smaller. So at the mixture in which
Onobrychis vicifolia has participated with 60 % in the mixture, the yield was
about 3.25 t/ha d.m., and at the mixture with 20 % Onobrychis viciifolia the
yield has decreased to 2.41 t/ha d.m. (74 %).
The fertilization had a positive effect on the forage yield at all the
mixtures under study, but the yields depended on the type of the mixture and
on the fertilizers which were applied. The mixtures with Medicago sativa
have reacted to fertilization more significantly than those with Onobrychis
viciifolia.
