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- Title
STAN DOMIESZKI OLSZY SZAREJ (ALNUS INCANA (L.) MOENCH) I JEJ WPŁYW NA WZROST SOSNY ZWYCZAJNEJ (PINUS SYLVESTRIS L.) W WARUNKACH SUCHEGO OLIGOTROFICZNEGO SIEDLISKA NA POŻARZYSKU.
- Authors
Korzeniewicz, Robert; Szulist, Marta; Perz, Bartosz; Baranowska, Marlena
- Abstract
Background. The study presents an evaluation of the impact of grey alder (Alnus incana (L.) Moench) on Scots pine (Pinus sylvestris L.) in a dry oligotrophic habitat in a post-fire area. Material and methods. The study was carried out at the Department of Silviculture, the Poznań University of Life Sciences in permanent experimental plots in a post-fire area in the Potrzebowice Forest District (52°85'N 16°17'E). The experimental area was established in 1994 in a block of 6 replications. Five tree species mixing variants were used. The following variants of mixing Scots pine and grey alder were adopted in the experiment: variant 1 - 100% pine (So100); variant 2 - 75% pine (So75), 25% alder (Ol25); variant 3 - 50% pine (So50), 50% alder (Ol50); variant 4 - 25% pine (So25), 75% alder (Ol75); and variant 5 - 100% alder (Ol100). Observations and biometric measurements of Scots pine made 21 years after planting suggest beneficial effects of grey alder on Scots pine. Results. The average survival rate of grey alder was 15.6%, while that of Scots pine was 46.6%. The average height of grey alder in the whole experiment was close to 1.4 m and that of Scots pine more than 9 m. In terms of diameter at breast height (DBH), the highest values were obtained for Scots pines growing at a 75% admixture of grey alder, i.e. mean 11.13 cm. It was observed that a decreasing share of alder also caused a reduction in the average values for Scots pine DBH. One-way analysis of variance at the significance level of a = 0.05 showed statistically significant differences in the DBH of Scots pines growing at different admixture rates with grey alder (F = 9.779, p = 0.000352). The variant with a 75% admixture of grey alder forms an independent group with the thickest pines. In turn, the variant with no grey alder admixture (So100) comprised an independent group with the smallest DBH, while it simultaneously showed the highest productivity. Conclusion. Grey alder has a positive effect on the biometric features of Scots pine. A high proportion of grey alder (50% and more) reduces the possibility of producing wood from tending operations. A prolonged positive effect of grey alder on pine may be provided by selecting a row form of admixture planting and increasing its share to 50%.
- Subjects
SCOTS pine; ALNUS glutinosa; ONE-way analysis of variance; FORESTS &; forestry; ALDER; LIFE sciences; SMALL groups
- Publication
ACTA Scientiarum Polonorum Silvarum Colendarum Ratio et Industria Lignaria, 2019, Vol 18, Issue 1, p31
- ISSN
1644-0722
- Publication type
Article
- DOI
10.17306/J.AFW.2019.1.4