Journal article
Early individual growth of Eucryphia cordifolia and Laurelia sempervirens planted under different competition conditions in south-central Chile



Publication Details
Authors:
Uteau Puschmann, D.; Donoso, P.
Publication year:
2009
Journal:
Ciencia e Investigación Agraria
Pages range:
85-95
Volume number:
36
ISSN:
0304-5609

Abstract
D. Uteau, and {P.J.} Donoso. 2009. Early individual growth of Eucryphia cordifolia and Laurelia sempervirens planted under different competition conditions in south-central Chile. Cien. Inv. Agr. 36(1):85-96. Few studies have focused on forest research in plantations with Chilean native species midtolerant to shade. Such species may use resources that intolerant species cannot, increasing the total site productivity. This study aimed to define the factors that explain the growth of Eucryphia cordifolia Cav. and Laurelia sempervirens (Ruiz el Pavon) Tul., two midtolerant species of southern Chile. We sought to determine the effect on these species of competition in mixed-species plantations. At the time of this study, the plantations were 4 to 22 years old. Two competition indices were used for each species: the Growing Space Polygon ({GSP)} and the Crown Competition ({CC).} The {GSP} proved to be very useful in predicting the growth in the older plantations where E. cordifolia and L. sempervirens had their crowns below the main canopy, suggesting strong competition for water and nutrients (also called symmetric competition). In contrast, in Young plantations (around 10 years old), growth was better explained by {CC}, suggesting that competition occurs mainly for light (also called asymmetric competition). Silvicultural techniques that could improve the growth of these species in mixed plantations were proposed, such as an earlier thinning entry to provide these species with more room for light, as dictated by their inter-mediate tolerance to shade.


Keywords
Competition, competition, , crown, forest, , growing, growth, , index, , midtolerant, polygon, , silviculture, space, species

Last updated on 2019-25-07 at 12:24