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Acta Agriculturae Slovenica
Article . 2011 . Peer-reviewed
License: CC BY
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Acta Agriculturae Slovenica
Article . 2011
Data sources: DOAJ
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Analiza fenofaz paš, pri čebelah v Novem mestu

Authors: Jelen, Lucija - Glorija;

Analiza fenofaz paš, pri čebelah v Novem mestu

Abstract

Preučevali smo vpliv temperature zraka na izbrane fenološke faze čebel (Apis mellifera carnica Pollman) za obdobje 1971-2007 v Novem mestu. Medletna variabilnost nastopa fenofaz (prva paša čebel, paša na robiniji, paša na lipi) je velika, variacijski razmik znaša od 44 do 86 dni. S časovno analizo smo ugotovili, da se kot posledica višjih temperatur zraka ter zgodnejših rastlinskih fenofaz, tudi fenofaze pri čebelah pojavljajo v zadnjem obdobju zgodnejše. Statistično značilen linearen trend za prvo pašo čebel znaša -19 dni/dekado, za pašo na robiniji pa -10 dni/dekado. Fenofaza paša na lipi nima statistično značilnega trenda. Povezanost med fenološkim razvojem in temperaturo zraka smo preučevali s korelacijsko analizo. Vrednosti koeficientov korelacije so med -0,45 in -0,70. Vse tri fenofaze so najbolj korelirane s povprečnimi dvomesečnimi temperaturami marca in aprila. Izdelali smo enostavne regresijske modele za napoved časa nastopa fenofaz na osnovi temperature zraka. Kot pojasnjevalne spremenljivke modela smo vključili povprečne mesečne temperature zraka in termalni čas, potreben za nastop izbrane fenofaze. Akumuliran termalni čas smo izračunali kot vsoto aktivnih temperatur (vsota pozitivnih temperatur od 1.1. dalje) in efektivnih temperatur (temperaturna vsota nad temperaturnim pragom 10 °C od 28.2. dalje). Koeficienti variabilnosti (KV) za izračunan termalni čas znašajo od 15 % do 43 %. Z metodo regresije po korakih smo oblikovali linearne regresijske modele za napoved časa prve paše čebel in paše na robiniji. Z modeli smo lahko pojasnili od 53 % do 91 % variabilnosti v času nastopa fenofaz.

Country
Slovenia
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Keywords

ekologija, fenofaze, čebele, temperatura zraka, S, regresijski modeli, Agriculture, trendi, paša, info:eu-repo/classification/udc/638, fenologija, termalni čas

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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