Production and profitability of low density Norway spruce (Picea abies (L.) Karst.) plantation at 50 years of age: case study from eastern Latvia
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Katrevičs, J.
Džeriņa, B.
Neimane, U.
Desaine, I.
Bigača, Z.
Jansons, Ā.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Norway spruce (Picea abies (L.) Karst.) is one of the most important commercial tree
species, for which wider spacing are being advocated to reduce management costs and improve
radial growth. Nevertheless, little is known about tree and stand parameters at the larger age in
stands of extremely low density. The aim of our study was to assess growth and economic
profitability of 50 years old low density Norway spruce plantation in Latvia. Allometric
parameters for all trees of Norway spruce clonal plantation planted in 1964 with two spacings
(1×3 m and 5×5 m) were measured and profitability were estimated. Norway spruce plantation
with wider (5×5 m) spacing ensured significantly larger tree diameter and height (35 cm and
25 m, respectively) than trees from higher density trial. However, mean net present value
(3% interest rates) was non–significantly (P = 0.12) different between 5×5 m and 1×3 m
spacings, 2,571.9 ± 355.6 and 3,085.8 ± 452.9 € ha-1
, respectively. Values observed in low
density (5×5 m) plantation fitted well in the observation of impact of density and stand parameters
drawn based on National inventory data, showing a considerable potential to use plantations with
low density in practice.
Kirjeldus
Article
Märksõnad
initial spacing, target diameter, clonal plantation, net present value, articles