Caracterización dasométrica de familias de Juglans neotropica diels recolectadas en la provincia de Tungurahua

Abstract

This research, a genetic test of Juglans neotropica Diels installed in the Tunshi Experimental Station of the ESPOCH was carried out in order to characterize dasometrically families of Juglans neotropica Diels collected in the Tungurahua Province in April 2018. 160 seedlings of 21 genetic families from the mentioned province were planted. The families were obtained from open- pollinated sedes. An incomplete block design was carried out at a spacing of 4 m x 4 m random. The variables survival, DAP, clean stem height, total height plantation health, IMA, Average Annual increase in diameter at the base/neck of the tree, basal area per tree, and basal area of the plantation were evaluated. Data were analyzed in INFOSTAT. The families were studied at 4.7 years of age. A survival of 97% was obtained, an average DAP of 5.94 cm, an average DAC IMA of 20.76 mm, an average total height of 327.94 cm, an average annual increase in average. Height of 64 cm, an average clean stem height of 249.58 cm, an average, Basal Area of 0.0031 (m2 tree- 1), an average Basal Area (m2 ha-1) of 1.84 m2 ha-1an average, Quadratic Diameter of 0.51. In the health variablethe presence of holes in the stem was identified, a symptom that the individuals presented both from the basal part and in the terminal part; only in the terminal part 27.74 % (43 of 155 trees) and there were 69 trees (44.52%) who did not present symptoms of the health problem. From the observed trends of the dasometric characteristics it was possible to glimpse that the evaluated families showed similar growths. However, the families J20, J18, TOAFP1, J13 and J14 stood out mathematically in the variables