Factores de manejo en vivero que influyen sobre crecimiento y supervivencia de Pinus douglasiana en México

Abstract

Pinus douglasiana is a fast-growing endemic species of Mexico, which is one of the most used in reforestation programs in western Mexico due to its importance in forest areas; however, it is one of the least documented. Therefore, the objective of this research was to evaluate the effect of container volume, supplemented fertilization and the irrigation regime in the nursery, on morphological and physiological variables and survival in the field. In the nursery, 750 12-month-old plants were selected, which were transplanted and subjected to three evaluation factors (container volume, fertilization and irrigation), having 8 treatments. In the field phase, 496 nursery-grown plants of the same treatments were established, following the completely randomized block model, with a 23 factorial arrangement. The main factor that significantly affected most of the variables evaluated was container volume. Most of the morphological and physiological variables decreased as container volume decreased. Factor interactions have more significant effects than those presented individually. Finally, it was found that P. douglasiana cultivated in five-liter containers, without additional fertilization and without continuous irrigation for six months in the nursery presented the highest percentage of survival one year after their establishment in the field (88 %).