STUDY ON THE VARIABILITY IN DRY MATTER CONTENT OF SEVERAL LOLIUM PERENNE L. LINES MAINTAINED AND PRESERVED AT ARDS LOVRIN PUBLISHEDDRAGOȘ Marcela, RECHIȚEAN D., SALA Anca None email@example.com
Preserving biodiversity in the agricultural landscape is a real challenge for this historical period of humanity, a challenge that arises from the need to understand the combined functions of agrobiodiversity - ecological and social - of its contributions to both the ecosystem and society. At present, about 90% of the food production is provided by approximately 120 species of crop plants. Besides the drastic reduction of specific diversity, with the advent of industrialized agriculture, an intensified process of genetic erosion has begun. Romania has the largest variety of regional and traditional plants in Europe: a "true treasure" (Friedrich Wilhem Graefe zu Baringdorf). There is a significant number of traditional varieties in Romania, as evidenced by the collection at the Gene Bank from Suceava - Romania. The traditional old seeds, the old germoplasm of the Romanian local populations, formed under the influence of natural selection, are a very precious heritage, an endangered wealth. In any research activity, the use of a properly and fully, correctly and fully biologically characterized, such as that existing germplasm collections, is a necessity. The germoplasm collection of the Lovrin Agricultural Research and Development Station, consisting of more than 2000 clones, was sampled from the plain permanent grasslands of the Banat Plain area and from the permanent grasslands of Caras-Severin, Arad and Hunedoara counties. After applying multiple selection cycles to the Lolium perenne ecotypes, 10 lines were selected, depending on the position of the shoots, the precocity and the width of the leaf. The 10 Lolium perenne lines were sown at the end of August 2017, and the first results on dry matter production were made in 2018. Three mowings were made, the share of which in the final production was the following: 48% at the first mowing; 34% at the second mowing; 18% at third mowing. By reference to the mean of all the results, the highest yield was obtained on the Lolium perenne 3 line (with a difference of 0.55 t/ha of dry matter), followed by the Lolium perenne 1 line (with a difference of 0.46 t/ha dry matter).
Lolium perenne, dry matter, maintenance, conservation
field crops and pastures