| Name of article: | Hodnotenie vplyvu podzemnej vody na rast a objemovú produkciu topoľa ´Pannonia´v intenzívnych kultúrach na Východoslovenskej nížine |
|---|---|
| Number: | 1 |
| Year: | 2008 |
| Author: | Štefan Kohán |
This article presents results based on assessment of growth and volume production of poplar ´Pannonia´on 5-year series of research plots on mean heavy clay soil in intensive cultures lying in the non-flooded alluvia of the Latorice river. Series of research plots involves two partial plots, plot I and plot II. Due to level of groundwater in the depth of 3.0-3.5 m during spring plot I represents half-dry site for breeding water-demanding Euroamerican poplars, whilst plot II where level of groundwater is in depth of 1.5-1.8 m during spring is half-moisture and suitable for poplar breeding. Evaluation of results shows that favourable level of groundwater on plot II has positive effect both on height and diameter growth and volume production of observed poplar ´Pannonia´. On the plot II mean height reached 13.1 m, mean diameter 15.5 cm and Derbholz supply 36,250 m3 per ha; according to tree it is 50,270 m3 per ha, whilst on plot I values of mean height were 10.1 m, mean diameter 11.6 cm and Derbholz supply 13,125 m3. Proportional comparison of these data shows that on plot II mean height reached of 29.7%, mean diameter of 33.6% and Derbholz supply of 176.1% higher values than on plot I. The similar results were proved in comparison of average annual increments and volume of mean stem. These results must be taken only as preliminary due to low age of trees and will be needed to be completed and specified.
