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