Resumo

GONZALEZ LOPEZ, Héctor Darío  e  GONZALEZ URIBE, Dino Ulises. Biomass and fiber estimation of Agave lechuguilla Torr. at north of Zacatecas State. Rev. mex. de cienc. forestales [online]. 2023, vol.14, n.75, pp.97-117.  Epub 17-Mar-2023. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v14i75.1289.

Biomass and fiber yield tables were generated obtained from the bud of Agave lechuguilla at northern Zacatecas, Mexico. Regression models were evaluated to estimate green weight (pv, g) and dry weight of fiber (ps, g) by plant, respectively. The method of quadrants centered on a point was used as sampling to obtain information at 74 sites randomly located. In each plant it was measured, the smallest diameter (smd, cm), the largest aerial diameter (lad, cm), bud height (h, cm), pv (g) and ps (g). 296 buds were collected and they were manually carved to obtain the fiber, which was sun-dried in for 3-5 h. The average pv was 287.2 g bud-1, ps 19.1 g bud-1, average density was 2 149 plants ha-1. The correlation showed high statistical significance (P<0.01) for pv with lad (R=0.968) and ps with h (R 2 =0.945). The model pv=21.920(1.054)h was selected to estimate the green biomass performance table for presenting better adjustment statistics (R 2 aj =0.960, RCME=0.095, CV=1.688 %, Cp=2.002, │PRESS│=0.012 and PRESS=0.0001). For the fiber dry weight the selected model was ps=0.0003(h)2.812 (R 2 aj =0.921, RCME=0.164, CV=5.708 %, Cp=2.004, │PRESS│=0.123 y PRESS=0.015). The statistical criteria used gave certainty in the selection of models to generate biomass and fiber yield tables in the study area.

Palavras-chave : Agave lechuguilla Torr.; plant density; ixtle; lechuguilla; allometric model; biomass and fiber yield table.

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