The Influence of Species and Stocktype Selection on Stand Establishment: an Ecophysiological Perspective

Abstract

The species and stocktypes planted can have a profound impact on stand establishment. Selection of a particular type of seedling able to meet minimum performance expectations under specific types of environmental stress is only possible after careful evaluation of site conditions likely to exist at planting. These decisions have become less intuitive with improved understanding of how seedlings respond physiologically to different operational environments. Our understanding, however, of the physiological bases for observed response differences between stocktypes to the same site conditions remains poor for many situations. Physiological and morphological characteristics important for adequate seedling performance under various types of environmental stress are discussed with emphasis on harsh-site reforestation. A conceptual model for the selection of species and stocktypes best adapted to specific site conditions is also presented.