Colony strength in the spring inspection and its impact on the amount of foraged pollen at the time of red clover pollination

Abstract

In this study, the impact of honey bee colony strength in the spring inspection on the colony strength at the time of pollination, the amount of foraged pollen and on the colony strength in autumn was observed. The honey bee colonies were, after the spring inspection, divided into two groups, based on the amount of bees. The weak colonies, in spring inspection, had an average up to 4 frames occupied by bees and the strong colonies, in the spring inspection, had more than 6 frames occupied by bees. In addition to the amount of bees, the amount of brood and food supplies were assessed in the inspections. It was determined that the stronger colonies had more pollen foragers in all three year of observation. The quantity of foraged pollen, in addition to strength in the spring inspection, was influenced by year. In two years (first and third) more pollen and larger quantity of red clover pollen was collected by the strong colonies, while in the second year, more pollen and a large quantity of red clover pollen was collected by weak colonies. In the fall inspections was found that the strong colonies still had more bees and brood, more pollen and, also, more honey in relation to the weak colonies.

U radu je praćeno kako, snaga društava utvrđena na prolećnom pregledu, utiče na snagu društava u vreme oprašivanja crvene deteline, na količinu sakupljenog polena, količinu polena crvene deteline i na snagu društva na jesenjem pregledu. Društva su nakon prolećnog pregleda, a na osnovu količine pčela, svrstana u dve grupe, od po 10 društava. Slaba društva su na prolećnom pregledu imala prosečno do 4 rama zaposednuta pčelama, a jaka društva su prosečno na prolećnom pregledu imala više od 6 ramova sa pčelama. Pored količine pčela na pregledima je praćena i količina legla, i zaliha hrane. Praćenje je trajalo tri godine, utvrđeno je da jaka društva imaju više izletnica i više polenarica u vreme oprašivanja crvene deteline u sve tri godine posmatranja. Na količinu sakupljenog polena pored snage društva na prolećnom pregledu uticaj ima i godina. U dve godine (prvoj i trećoj) više polena ukupno i veću količinu polena crvene deteline sakupila su jaka društva, dok su u drugoj godini nešto više polena ukupno i veću količinu polena crvene deteline sakupila slaba društva. Na jesenjem pregledu je ustanovljeno da su jaka društva i dalje imala veću snagu (više pčela i legla), više polena, ali i više meda u odnosu na slaba društva. PR Projekat Ministarstva nauke Republike Srbije, br. TR31057.