Soil compaction in urban parks and green spaces of the Nitra city as a favourable growth criterion for woody plants
2009
Supuka, J., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Bajla, J., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Szombathová, N., Slovak Univ. of Agriculture in Nitra (Slovak Republic)
In the city of Nitra (Slovakia) soil compaction was measured using a conic resistance penetrometer P-BDA 3A. The observed sites were: the urban park Sihoť (P), housing estate Chrenová 1 (CH) and housing estate Klokočina (K). The soil compaction was measured under the tree crowns of four woody species: Acer saccharinum L., Negundo aceroides Nutt. Pinus nigra Arnold., Tilia cordata Mill. in a 3-4 m distance from the tree trunk. The localities most used by inhabitants - visitors are the green spaces of the housing estate Klokočina, less Chrenová 1 and least the urban park Sihoť. The highest penetration resistance was measured at Klokočina, the urban park Sihoť and the housing estate Chrenová 1 showed almost the same measurement results. Also a difference between the woody species was found, the highest penetration resistance was measured under Acer saccharinum and the lowest under Pinus nigra. As an example here are values of the penetration resistance under the tree crown of Tilia cordata at the depth of 10 cm given by the sites: P = 1.8 MPa, CH = 1.8 MPa, K = 2.8 MPa. The actual soil humidity was measured on the site P = 18.8%, K = 17.2%. The soil bulk density was measured on the site P = 1.69, K = 1.45 g per cubic cm. The withering point was measured on the site P = 17.47%, K = 14.52%. The data correspond to the soil compaction. On the Klokočina locality the lowest woody plant growths and early defoliation of Tilia cordata were observed.
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