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Fertilization, plant quality and field survival of Pinus spp. in Ixtlán de Juárez, state of Oaxaca

Revista Mexicana de Ciencias Forestales, ISSN: 2448-6671, Vol: 14, Issue: 76, Page: 71-92
2023
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Article Description

The Pinus patula and Pinus oaxacana seedling quality was evaluated under three fertilization treatments. The production cycle spanned along 9 months in the Ixtlán de Juárez forest nursery, state of Oaxaca, Mexico. The assessed variables were: caliper, height, tap root length, shoot, root and total dry weight, shoot/root ratio, slenderness coefficient, lignification index and Dickson index, as well as the root growth potential. Field survival 12 months after planting in localities of the same community was analyzed. The seedlings of both species reached a caliper ≥3.5 mm and heights from 28 to 42 cm. The mean values were: 3.5 g (total dry weight), 4.4 (shoot/root ratio), 8.1 (slenderness coefficient), 29.7 % (lignification index), 0.25 (Dickson index). After the application of fertilization treatments high and the traditional for the forest nursery, in both of the species were obtained mean and high quality seedlings. 12 months after planting, the mean survival was equal to 47 %. There were statistical significant differences for aspect (p=0.0266) and fertilization (p≤0.0001), but not for species (p=0.7604). The variables more closely related to the mortality risk in the plantation site were aspect, fertilization, caliper and root growth potential.

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