Document Type

Article

Journal/Book Title/Conference

Acta Agronomica Academiae Scientiarum Hungaricae

Volume

19

Issue

4

Publication Date

1-1-1970

First Page

283

Last Page

292

Abstract

During the examinations we have succeeded in developing a survey method providing nearly static results. Effects by the intensive moving of pollinators were not eliminated by earlier investigations. In this country it is this why the results of the two methods differ, although they can be compared by means of a table. Small sized lucerne fields show but slightly higher abundance in wild bees than large fields. In large fields the amount of species with a short flight period is lower, while abundance of the other groups is slightly higher than -or the same as -in small lucerne fields. In lucerne fields of thick stand there are fewer pollinators than in thin stands. Abundance of the group with a short flight period hardly shows any difference while that of other groups is significantly lower in thick stands. The· number of pollinators is the highest at the time when lucerne fields are in full blossom; the abundance of the flight groups is in connection with the intensity of their flight.

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