Studies concerning nectar secretion at rapeseed (Brassica napus L. ssp. Oleifera D.C.)
Published in Scientific Papers. Series A. Agronomy, Vol. LV-2012
Written by Nicoleta ION, Viorel ION, Răzvan COMAN, Adrian Gheorghe BĂŞA
Rapeseed (Brassica napus L. ssp. oleifera D.C.) is one of the main melliferous plants due to its nectar secretion and important number of flowers per plant, but especially due to its flowering in a critical period for honey bees, when important quantities of pollen and nectar are required. Although the nectar secretion of the rapeseed flowers is very important for the good development of the honey bees families in the spring and for obtaining some commercial honey yield by the beekeeper, and is playing an important role in the attractiveness of the honey bees as pollination agent for the rapeseed crops, there is still a lack of information concerning the nectar secretion by the rapeseed flowers. Under these circumstances, researches were carried out regarding the nectar secretion and honey production of different rapeseed crops located in different places from South Romania in the years 2009 and 2010. The nectar determination was completed by rapeseed plant characteristics such as plant high, average number of plants per square metre, average number of inflorescences per plant, average number of flowers per inflorescence, and average number of flowers per plant.