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The Impact of Overstory Species and Soil Properties on the Growth of Planted Silver Fir Abies alba in the Karkonosze Mountains, Poland

Dobrowolska Dorota, Pawlak Bogdan, Olszowska Grażyna

Polish Journal of Ecology

2021

Vol. 69, nr 1

14--24

Silver fir Abies alba was once an abundant tree species in the Karkonosze Mts. in Poland but its population has decreased. The aim of our study was to assess 1) the impact of canopy trees on the growth dynamics of silver fir saplings and 2) the relationship between the growth rate of silver fir saplings and the soil properties, with special regard to the soil enzyme activity. The study was conducted in the Karkonoski National Park on five experimental plots. Silver fir seedlings were planted in Scots pine, European larch, Norway spruce, silver birch and European beech stands in 1999. In 2016, we measured the diameter at breast height (DBH) and height of the canopy trees and the height, DBH, height increments, needle width and length of 100 silver fir saplings. The dehydrogenase, urease, phosphatase and asparaginase activity was analysed in organic and humus soil horizons. The height, diameter and needle dimensions of young silver fir trees were significantly different under different canopies. The urease and asparaginase activity was the highest under the larch and spruce canopy in both soil horizons. Phosphatase activity was also the highest under larch canopy but only in organic soil horizon. Young silver fir (thicket) has grown under the canopy of all tested tree species but found best growth conditions under larch and pine canopies. The relative growth of silver fir is therefore a function of both stand canopy and soil properties.

Wpływ niekontrolowanych wysypisk odpadów na aktywność enzymatyczną gleby

Bielińska E. J., Futa B., Wiśniewski J.

Prace Instytutu Nafty i Gazu

2007

nr 145

171-176

W pracy podjęto próbę oceny oddziaływania niekontrolowanych wysypisk odpadów na aktywność enzymatyczną gleby. Badaniami objęto pięć niekontrolowanych wysypisk odpadów zlokalizowanych na południowo-wschodnim obrzeżu Lublina. Odniesieniem były próbki glebowe pobrane z pól uprawnych znajdujących się w sąsiedztwie badanych wysypisk. W glebach na czterech wysypiskach, powstałych stosunkowo niedawno (przed czterema-pięcioma laty), stwierdzono kilkakrotnie większą aktywność badanych enzymów (dehydrogenaz, fosfatazy kwaśnej, fosfatazy zasadowej, ureazy i proteazy) niż w glebie z pól uprawnych. Przeciwne tendencje zanotowano w przypadku składowiska odpadów powstałego przed 20 laty.

The dissertation attempts to assess the impact of uncontrolled waste dumps on the enzymatic activity of the soil. Five uncontrolled waste dumps situated on the south-eastern outskirts of Lublin were examined as part of the study. The reference materials were soil samples collected from crop fields located in the vicinity of the studied dumps. In the soils of four of the most recent dumps (four or five years old) the activity of the studied enzymes (dehydrogenases, acid phosphatase, alkaline phosphatase, urease and protease) was observed to be several times higher than in the soil from crop fields. The opposite tendencies were observed in the case of the waste dump that was established 20 years ago.