EJPAU 2006. Giefing D. , Złota M. , Stypik P. , Wykpisz P. BIOLOGICAL REACTIONS OF THICK-BRANCHED SCOTS PINES (<I>Pinus sylvestris</I> L) TO PRUNING IN RELATION TO THE SEASON OF THE YEAR OF THE OPERATION

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 4/volume9

Topic:

Forestry

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Giefing D. , Złota M. , Stypik P. , Wykpisz P. 2006. BIOLOGICAL REACTIONS OF THICK-BRANCHED SCOTS PINES (Pinus sylvestris L) TO PRUNING IN RELATION TO THE SEASON OF THE YEAR OF THE OPERATION, EJPAU 9(4/volume9), #05.
Available Online: http://www.ejpau.media.pl/volume9/issue4/volume9/abs-05.html

BIOLOGICAL REACTIONS OF THICK-BRANCHED SCOTS PINES (PINUS SYLVESTRIS L) TO PRUNING IN RELATION TO THE SEASON OF THE YEAR OF THE OPERATION

Dieter Franciszek Giefing¹, Marta Złota², Paweł Stypik², Paulina Wykpisz²
¹ Department of Forest Utilization, University of Life Sciences in Poznań, Poland
² Department of Forest Utilization, August Cieszkowski Agricultural University of Poznan, Poland

ABSTRACT

The aim of the study was to assess the impact of the season of the year in which the pruning of large-branched pine trees was carried out on their biological response to this operation. The experimental material derived from a plantation which was established in 1984 on which pine trees at 4 x 4 m spacings were planted. In 1994, during tending cutting, the spacing arrangement was loosened to 8 x 8 m. The trees were pruned during three different seasons of the year: in spring and summer of 1995 and in winter 1996. Investigations were conducted on the material collected 7-8 years after the pruning of pine trees. The total of 354 knots derived from 20 trees was examined.

The thickness of knots without bark in the pruned trees ranged from 3 to 70 millimetres. All the examined knots were healthy. Knots pruned in spring occluded the fastest (90% of all knots occluded within 7 years), while those pruned in winter – slowest (after 7 years only 53% of knots became occluded).

Key words: thick-branched pine trees, pruning, pine plantation cultivation, knots, season of the year when pruning was done.

Dieter Franciszek Giefing
Department of Forest Utilization,
University of Life Sciences in Poznań, Poland
Wojska Polskiego 71A, 60-625 Poznań, Poland
Phone: +48 61 848 77 54
email: giefing@au.poznan.pl

Marta Złota
Department of Forest Utilization,
August Cieszkowski Agricultural University of Poznan, Poland
Wojska Polskiego 71A, 60-625 Poznan, Poland

Paweł Stypik
Department of Forest Utilization,
August Cieszkowski Agricultural University of Poznan, Poland
Wojska Polskiego 71A, 60-625 Poznan, Poland

Paulina Wykpisz
Department of Forest Utilization,
August Cieszkowski Agricultural University of Poznan, Poland
Wojska Polskiego 71A, 60-625 Poznan, Poland

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.