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Dejavnost opraševalcev na črnem ribezu, jagodnjaku in ameriški borovnici
ID Pibernik, Mojca (Author), ID Virant Doberlet, Meta (Mentor) More about this mentor... This link opens in a new window, ID Bevk, Danilo (Co-mentor)

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Abstract
Namen naloge je bil raziskati pomen medonosne čebele in divjih opraševalcev za črni ribez (Ribes nigrum), jagodnjak (Fragaria x ananassa) in ameriško borovnico (Vaccinium corymbosum). Zanimali so nas njihova pestrost, dnevna in sezonska dejavnost, vpliv vremena ter primerjava frekvence obiska cvetov medonosne čebele in čmrljev. Opazovanje je potekalo v letih 2017 in 2018 v Poskusnem nasadu Kmetijskega inštituta Slovenije na Brdu pri Lukovici. Na vseh treh rastlinah je prevladovala medonosna čebela, na črnem ribezu in ameriški borovnici so velik delež predstavljali čmrlji, jagodnjak pa je bil priljubljena paša za čebele samotarke in muhe trepetavke. Ostali opraševalci so se pojavljali redkeje. Medonosna čebela in muhe trepetavke so bile najaktivnejše v osrednjem delu dneva, medtem ko so bili čmrlji najdejavnejši v jutranjih in večernih urah, z izjemo hladnejših dni. Takrat so tudi čmrlji višek svoje dejavnosti dosegli v osrednjem delu dneva. Opraševalci so se razlikovali tudi v frekvenci obiskovanja cvetov. Največjo frekvenco obiska cvetov so imeli čmrlji, ki so v enakem času obiskali tudi do trikrat več cvetov kot medonosna čebela. Najdlje časa so se na cvetovih zadrževale čebele samotarke. Pri oceni pomena opraševalcev je tako potrebno upoštevati tudi njihovo učinkovitost. Razlike med opraševalci kažejo na velik pomen pestrosti opraševalcev za zagotovitev zanesljivega opraševanja v kmetijstvu.

Language:Slovenian
Keywords:opraševanje, opraševalci, divji opraševalci, medonosna čebela, čmrlji, čebele samotarke, črni ribez, jagodnjak, ameriška borovnica
Work type:Master's thesis/paper
Organization:BF - Biotechnical Faculty
Year:2020
PID:20.500.12556/RUL-120298 This link opens in a new window
COBISS.SI-ID:33883907 This link opens in a new window
Publication date in RUL:18.09.2020
Views:1000
Downloads:122
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Secondary language

Language:English
Title:Pollinators’ activity on blackcurrants Ribes nigrum, strawberries Fragaria x ananassa and blueberries Vaccinium corymbosum
Abstract:
The focus of this thesis was to investigate the importance of honeybees and wild pollinators on blackcurrants (Ribes nigrum), strawberries (Fragaria x ananassa) and blueberries (Vaccinium corymbosum). Furthermore, we were interested in pollinator diversity, daily and seasonal activity in various weather conditions and the frequency of flower visits for different pollinator groups. Observations were conducted in the years 2017 and 2018 in the research orchard of the Agricultural institute of Slovenia located at Brdo pri Lukovici. The most frequently observed pollinator was the honeybee. Bumblebees were frequent on blackcurrants and blueberries, whereas solitary bees and hoverflies were often seen on strawberries. Other pollinator groups appeared less often. Honeybees and hoverflies were most active in the middle of the day, whereas bumblebees were mostly active in the morning or in the evening. Colder days were an exception, when their daily activity pattern resembled that of the honeybee. Bumblebees had the highest frequency of flower visits, even up to three times higher than that of honeybee. Solitary bees had the lowest frequency of flower visits. In evaluating pollinator importance, it is crucial that we take into consideration their effectiveness and individual features of specific pollinator groups, because only wide variety of pollinators can ensure effective pollination.

Keywords:pollination, pollinators, wild pollinators, honeybee, bumblebees, solitary bees, blackcurrant, strawberry, blueberry

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