Site requirements of lenga, Nothofagus pumilio

Abstract

The natural geographical range for lenga, or Nothofagus pumilio (Poepp. et Endl.) Krasser, extends in South America from 36°50' to 56° south latitude. North of 43° S, lenga occurs discontinuously and always at treeline, while to the south, lenga is more continuous. Among other factors that determine the geographical range of lenga, water availability is the most important overall factor, although temperature is the most important factor determining its altitudinal range. The climatic influence of precipitation and evaporation, together with the soil's waterholding capacity, are fundamental to ensure the supply of water that lenga needs. However, lenga does not grow in poorlydrained soils and its growth is limited by low fertility.
The most propitious area for lenga is in the neighborhood of Coyhaique, Chile, were climate and soils arc the most favorable. Precise determination of site requirements for lenga will only be achieved by compiling sufficient data on physiographical position and soil characteristics for each stand in future studies and inventories.