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Secondary forests are ecosystems generated by natural or anthropic actions. In the Amazon it occurs basically due to the practice of the slash-and-burn system, for agricultural uses and illegal crops; however, the knowledge of the characteristics, their potentialities and the importance of these are limited. Therefore, the objective of this research was to determine the timber potential, the aerial biomass and the carbon capture of the tree component, in areas that were abandoned after the cultivation of Erythroxylum coca Lam. (coca), at the Macuya Research and Training Center of the National University of Ucayali. Vegetation was evaluated in four plots of 50 × 50 m and 25 sub-plots of 10 × 10 m. In each plot, all tree species, palms, and lianas were recorded and identified, the diameter at breast height from 10 cm, the total and commercial height, were also measured. In this study, 33...

To determine the in vitro allelopathic effect of the aqueous extract of Calathea lutea (Aubl.) E.Mey. ex Schult. (bijao) on the initial growth of Lactuca sativa L. (lettuce) variety White Boston. An extract at 15% w/v was prepared with each part of the bijao plant (stem, leaf, and root), it was left to stand for 48 hours, then extracts at 2, 4, 6% concentrations were obtained by dilution. 10 lettuce seeds/petri dishes were sown, irrigating daily with 5 ml of each concentration of the extract. The control treatment received distilled water. The research was adjusted to a Complete Random Design (DCA), with a 3A x 4B factorial arrangement (A = parts of the plant and B = concentration of the extract), with four repetitions. At 10 days after germination, it was statistically evaluated and demonstrated (p ≤ 0.05) that the germination percentage (7.5%), root length (1.23 cm), stem fresh weigh...