Gain of processed alfalfa seed at the Institute of Field and Vegetable Crops 1997-2000

Abstract

Natural alfalfa seed from contracted 1997-2000 production in the Vojvodina province was processed at the Forage Crops Department of the Institute of Field and Vegetable Crops in Novi Sad. The seed was processed on a Kamas Westrup, while the dodder was removed using a trifoline magnet. Twelve samples were taken from the seed producers in each of the four study years. Each sample was divided into three parts (one for the producer, one for laboratory analysis and one for the processor (The greatest purity was achieved in 2000 (53% on average), followed by 1998 (48%). The year 1997 had a considerably lower purity (42,8%), while 1999 had the lowest (only 34,8%). The smallest amount of processed seed was obtained in 1999 (28,8 t). In the year 2000, which was fairly favorable seed production-wise and had the largest utilization percentage *53,7% of pure seed), a total of 77,5 t was processed. In 1997, five alfalfa cultivars were used seed production, while in 1998, 1999 and 2000 there were three each.

U radu su iznete proizvedene i dorađene količine semena lucerke (1997-2000) godine i uticaj čistoće naturalnog semena lucerke na randman dorade u zavisnosti od sorti i godine proizvodnje. Randman dorađenog semena lucerke zavisi od prisustva raznih-primesa u naturalnom semenu. Najniži randman semena u četiri godine (%) bio je u 1999 god. 34,8 %. Najbolja čistoća semena i iskorišćenje (%) dobijena je doradom semena u 2000. godini od 53,7%. U toku navedene četiri godine ispitivanja vršene su laboratorijske analize na uzorcima: čistoća, učešće nečistoće, prisustvo inertnih materija i korova izraženo je u procentima (%). Najniža čistoća dorađenog semena (%) u odnosu na naturalno seme pojedinih uzoraka (uzorak 4) je iz 1999. god. od 14,7%, a najviša čistoća (uzorak 12) iz 2000. god. je 90,0 %). Učešće nečistoće u semenu kretalo se od 10,0% (u 2000. g.) do 85,3 % (u 1999. g) Prisustvo inertnih materija 9,0 % (u 2000) do 63,0 % (1997) god., a učešće korova u naturalnom semenu 1,0% (u 2000) do 28% (u 1999) god. Čistoća dorađenog semena, u odnosu na naturalno seme lucerke (%) uslovljena je od zakorovljenosti useva, uspeha primenjene desikacije, podešenosti kombajna pri radu u žetvi i dr.