{"id":"diaz-franco-2007-pinus-patula-agb","source":{"id":"diaz-franco-2007","citation":"Díaz-Franco, R., Acosta-Mireles, M., Carrillo-Anzures, F., Buendía-Rodríguez, E., Flores-Ayala, E., & Etchevers-Barra, J. D. (2007). Determinación de ecuaciones alométricas para estimar biomasa y carbono en Pinus patula Schl. et Cham. Madera y Bosques, 13(1), 25-34.","title":"Determinación de ecuaciones alométricas para estimar biomasa y carbono en Pinus patula Schl. et Cham.","authors":["Díaz-Franco, R.","Acosta-Mireles, M.","Carrillo-Anzures, F."],"year":2007,"venue":"Madera y Bosques","doi":"10.21829/myb.2007.1311233","url":"https://doi.org/10.21829/myb.2007.1311233","read_url":"http://myb.ojs.inecol.mx/index.php/myb/article/download/1233/1403","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Pinus patula total aboveground biomass from DBH (Tlaxco, Tlaxcala)","output":{"quantity":"agb"},"expression":"0.0357 * D^2.6916","published":{"expression":"0.0357 * DN^2.6916","units":{"DN":"cm"},"variables":{"DN":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus patula Schl. et Cham.","family":"Pinaceae","group":"conifer"},"region":{"scope":"site","countries":["MX"],"place":"Ejido Mariano de Matamoros, Tlaxco, Tlaxcala","biomes":["temperate","montane"]},"stand":"natural","fit":{"n_trees":25,"dbh_min_cm":6.7,"dbh_max_cm":64.1,"r2":0.98,"method":"power model Y = b*X^k fitted to total aboveground dry biomass (stem, branches, foliage); no correction factor stated"},"evidence":[{"field":"expression","quote":"B = 0,0357 * DN2.6916","locator":"Resultados, Estimación de biomasa, p. 29"},{"field":"model form","quote":"Y = b * Xk (1) ... donde Y es la biomasa aérea (kg), X es el DN (cm)","locator":"Materiales y Métodos, p. 28"},{"field":"fit.n_trees","quote":"Se seleccionaron 25 árboles de P. patula","locator":"Materiales y Métodos, p. 27"},{"field":"fit.dbh_range","quote":"El DN de los árboles muestreados varió en un rango de 6,7 a 64,1 cm","locator":"Resultados, p. 29"},{"field":"fit.r2","quote":"coeficiente de determinación alto (R2 =0,98)","locator":"Resultados, p. 29"}],"check":[{"inputs":{"D":10},"expected":17.55,"origin":"published","note":"Tabla 2, columna 'Presente estudio' (biomasa total, kg), p. 31"},{"inputs":{"D":20},"expected":113.38,"origin":"published","note":"Tabla 2, columna 'Presente estudio' (biomasa total, kg), p. 31"},{"inputs":{"D":50},"expected":1335.41,"origin":"published","note":"Tabla 2, columna 'Presente estudio' (biomasa total, kg), p. 31"},{"inputs":{"D":65},"expected":2705.86,"origin":"published","note":"Tabla 2, columna 'Presente estudio' (biomasa total, kg), p. 31"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Tabla 2 prints predicted total biomass at DN 5-65 cm; four rows reproduce within rounding. Decimal comma in the original. Biomass includes stem (stump cubed as a truncated cone), branches and foliage. The paper does not say whether the stand is natural or planted: trees came from a stand under forest management (aprovechamiento), recorded here as natural. The paper also prints a carbon equation (CC = 0,021 * DN 2.6451), not stored because it is not a biomass equation."}