RESEARCH ON BIOLOGICAL ASPECTS AND TECHNOLOGICAL FACTORS AFFECTING SEED PRODUCTION IN PERRENIAL LEGUMINOUS FOR GRASSLAND PUBLISHED

Marius Viorel Olar, M. Olar, N. Sima, Viorica Olar, G. Mihai, D.V. Ciornei
The purpose of the research was to improve the crops technology  of  perrenial  grassland leguminous  by optimizing technological elements in interdependence with specific biological aspects of the new varieties. Four species of perennial grassland  leguminous were taken in the study  namely Medicago sativa  Satelit variety  , Trifolium pratense Select 1 variety, Onobrychis vicifolia Splendid  variety  and Lotus corniculatus Alina  variety. Research directions discussed in the paper were: -the timing of optimal seeding for the  perennial leguminous species taken in the study  to obtain high seed production and reduce the period of entry into production of perennial leguminous seed lots from 2 years to 1 year;  -determinate the influence of fall-spring grazing by animals of seed lots of perennial leguminous grassland on their seed production;  -the study  of first cut  time on seed production and quality issues in interdependence with the  fructification biology of perennial grassland  leguminous; -study the influence of roller work in seeding  the seed production for the  perennial leguminous species of grassland; -determining the distance of seeding  between rows, the seed quantity  and optimum fertilization of perennial leguminous  species of grassland; -determining the optimal duration of exploitation for the  seed lots of perennial leguminous grassland; -the influence of technological elements applied to installed nodules in living bacteria of the genus Rhizobium on roots of perennial grassland leguminous. Research results can be applied in developing sectors of agricultural development and research stations and private farms producing seed having similar climatic conditions Transylvania area. Practical implementation of results reduces the costs of establishing  and operating of the perrenial  forage grassland crops  with 25-30 %  and can extend their economic exploitation by 1-2 years depending on the species.
seed; perennial leguminous; technology
Presentation: oral

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