Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(6), 15-20 | DOI: 10.11118/actaun201260060015

Monitoring the spring phenological stages in a spruce monoculture in the Drahanská vrchovina upland in 2005-2011

Emilie Bednářová1, Sabina Truparová1, Lucie Merklová2
1 Ústav ekologie lesa, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
2 Krajský úřad Středočeského kraje, odbor životního prostředí a zemědělství, Zborovská 11, Praha 5, Česká republika

The paper evaluates the onset and duration of spring vegetation phenological stages in a spruce monoculture of the third age class in relation to changing parameters of the environment in the region of the Drahanská vrchovina Upland. Temperature requirements of Norway spruce necessary for the onset particular phenological stages were evaluated on the basis of sums of effective temperatures > 5 °C. The period of 2005-2011 is processed in relation to long-term monitoring since 1991. Based on results obtained, there is considerable variability owing to changing climatic conditions in the onset of spring phenological stages in the course of monitored years. In recent years, the earlier onset of spring phenological stages occurs and their duration gets shorter. This phenomenon is caused by higher air temperatures in spring months. The statistical processing of results obtained demonstrated the high dependence of the onset of particular phenological stages on the temperature of air and soil. Particular factors affecting budbreak and foliation cannot be detached and thus, it is necessary to be evaluated as a complex of influences. Long-term phenological studies of forest trees can serve as the bioindicator of climatic changes.

Keywords: Norway spruce (Picea abies /L./ Karst.), monoculture, phenological stages, weather, effective temperature, soil temperature, environment
Grants and funding:

This paper was supported by the Ministry of Education, Youth and Sports of the Czech Republic, project No. MSM 6215648902 and IGA MENDELU 4100721.

Received: July 25, 2012; Prepublished online: July 19, 2013; Published: July 20, 2013  Show citation

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Bednářová, E., Truparová, S., & Merklová, L. (2012). Monitoring the spring phenological stages in a spruce monoculture in the Drahanská vrchovina upland in 2005-2011. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis60(6), 15-20. doi: 10.11118/actaun201260060015
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