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Poplar
2012, Issue 189-190, p. 1-9

Original scientific paper
UDC: 582.52:582.681.81(439.2)

Stand Structure and Yield of Mixed Black Locust (Robinia pseudoacacia L.) and White Poplar (Populus alba L.) Stands under Sandy Soil Conditions in Hungary: A Case Study


Károly Rédei 1*, Zsolt Keserű 1, János Rásó 1, Lajos Juhász 2, Borbála Antal 2, Saša Orlović 3


1 Hungarian Forest Research Institute, Sárvár, Hungary
2 University of Debrecen, Faculty of Agriculture, Debrecen, Hungary
3 University of Novi Sad, Institute of Lowland Forestry and Environment, Novi Sad, Serbia

Corresponding author:
Károly Rédei, E-mail: redei.karoly@t-online.hu


Abstract

The paper deals with the stand structure and yield of black locust (Robinia pseudoacacia L.) forests mixed with white (Populus alba L.) in various proportions, partly applying a new methodological approach. The main stand structure and yield factors were determined separately for each species, measured stem by stem, using the volume functions prepared for each species. The ratio of the volumes of the species (A and B) in mixed and in pure stands (based on volume tables) was determined. A close relationship has been found between the ratio by relative total volume and the proportion (by the number of stems) of the species. The relative surplus in the volume of the mixed stands varied between 1.32-1.80 at age 16 and 21 years compared to the control, i.e. the yield of pure stands of the species concerned. The trial has also proven that if two species have a fast initial growth rate and a similar rotation age, they can be planted in mixed stands resulting in mutual advantages.


Keywords: stand structure, yield, white poplar, black locust, sandy soil
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