Sobrevivência e crescimento de pinheiros tropicais em Penhalonga - Manica

Abstract

The present study was carried out at the Penhalonga production unit, in the province of Manica, with the aim of analyzing the survival and growth of different species and origins of tropical pines. The experiment, set up in February 1986 second completely randomized block design (DBCC) with nine treatments and three repetitions. The species analyzed included Pinus patula, Pinus oocarpa, Pinus caribaea and Pinus kesiya, coming from various places, such as Belize, Zimbabwe, Honduras, Nicaragua and Brazil. The variables studied were survival, total height, diameter at breast height (DBH) and cylindrical volume. The results indicated that there was no statistically significant difference significant between species in relation to growth in height and diameter, but there was significance for survival and volumetric growth. The best survival rate was observed in Pinus patula subsp. tecunumannii from MT. Pine Ridge/Belize, with 66.67%, followed by Pinus caribaea var. hondurensis from Alamicamba/Nicaragua (66.67%) and Pinus caribaea var. hondurensis from Guanaja/Honduras (65.33%). In terms of cylindrical volume, Pinus patula subsp. tecunumannii also performed best, with 2.11 m³/tree. In contrast, Pinus elliottii var. elliottii from Zimbabwe recorded the worst performance in all variables, with only 10.67% survival and 0.77 m³/tree of cylindrical volume. Based on the results, it is recommended to plant Pinus patula subsp. tecunumannii due to its good performance in survival and growth. It is also important to protect the plantations against illegal felling and carry out future studies to better understand the behavior of species in different environmental conditions (TRADUÇÃO NOSSA)