Examinando por Materia "Secuestro de carbono"

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Economic profitability of carbon sequestration of fine-aroma cacao agroforestry systems in Amazonas, Peru
(MDPI, 2024-03-08) Goñas Goñas, Malluri; Rojas Briceño, Nilton B.; Gómez Fernández, Darwin; Iliquín Trigoso, Daniel; Atalaya Marin, Nilton; Cajas Bravo, Verónica; Díaz Valderrama, Jorge R.; Maicelo Quintana, Jorge L.; Oliva Cruz, Manuel
Currently, the economic profitability of cocoa is being affected by the increasing incidence of pests, low selling prices, high production costs, and the presence of cadmium in cocoa farms, posing a potential risk of crop abandonment. Therefore, the objective of the present research was to evaluate the economic profitability of carbon sequestration of fine-aroma cacao agroforestry systems in Amazonas, Peru, using the economic indicators of NPV, EIRR, and the benefit–cost ratio. For this purpose, 53 small cocoa producers of the APROCAM cooperative were involved, from which data were obtained on the general characteristics of the production system, production and maintenance costs, indirect costs, and administrative costs; in addition, the costs of implementation and maintenance of an environmental services project were calculated to finally make a cash flow projected over 5 years. As part of the results, the economic analysis was carried out on 104.25 hectares of cocoa belonging to the total number of farmers evaluated, who reported an average yield of 957.32 kg of dry cocoa per he. In addition, it was found that the production cost is PEN 3.91/kg of dry cocoa, and the average selling price is PEN 7.38/kg of dry cocoa. After the economic analysis, it was found that the implementation of an environmental services project is profitable (NPV = PEN 1,454,547.8; EIRR = 44% and B/C = 1.86). These results open up an opportunity for cocoa farmers to diversify and increase their income by contributing to climate change mitigation.
Growth, Productivity, and Biomass–Carbon Allometry in Teak (Tectona grandis) Plantations of Western Mexico
(MDPI (Multidisciplinary Digital Publishing Institute), 2025-09-27) Ruiz Blandon, Bayron Alexander; Hernández Alvarez, Efrén; Martínez Trinidad, Tomás; Amaringo Cordova, Luiz Paulo; Ucañay Ayllon, Tatiana Mildred; Bernaola Paucar, Rosario Marilu; Hernández Plascencia, Gerardo; Orellana Mendoza, Edith
Teak (Tectona grandis L.f.) is a leading tropical plantation species valued for high-quality timber and carbon (C) storage. This study assessed stand growth across ages and sites, quantified biomass and C by tree component and stand, and developed DBH-based allometric equations for biomass and C estimation. Six stand ages (5, 6, 9, 11, 14, and 17 years) were assessed in three municipalities of Nayarit, Mexico. Dendrometric inventories in permanent plots and destructive sampling of 35 trees provided calibration data for leaves, branches, stem, and roots. C concentration was determined with an elemental analyzer, and nonlinear regression models were adjusted and validated. Stand biomass and C increased with age, peaking at ages 11–14 (>130 Mg ha⁻¹; >60 Mg C ha⁻¹), with lower values at age 17. San Blas and Rosamorada accumulated significantly more than Tuxpan, reflecting site quality. C concentration was stable across sites and ages, with stem and roots consistently ranging between 48% and 50%, and leaves and branches averaging 45%–46%. Allometric equations were most accurate for stem and total biomass/C (R² = 0.73–0.79), while foliage showed higher variability. On average, 60%–70% of biomass was allocated to the stem and 15%–20% to roots. Indicators were stable, with an aboveground-to-belowground ratio (A:B) ≈ 4.9 and a biomass expansion factor (BEF) ≈ 1.5. The current annual increment (CAI) presented two main peaks: ~20 Mg ha⁻¹ yr⁻¹ at ages 5–6 and ~11 Mg ha⁻¹ yr⁻¹ at ages 9–11, followed by a decline after age 14. Teak in western Mexico reaches peak productivity at ages 6–11, with belowground biomass essential for accurate C accounting.
Valoración económica de plantaciones de bolaina blanca (Guazuma crinita Mart.) en Ucayali, Perú
(Instituto de Investigaciones de la Amazonía Peruana - IIAP, 2022-12-30) Revilla Chavez, Jorge Manuel; López Galán, Edinson Eduardo; Gonzales Alvarado, Antony Cristhian; Manturano Perez, Rubén Dario; Sáenz Ramirez, Lyanna Hellen; Guerra Arevalo, Hector; Rojas Mego, Krystel Clarissa; Mori Vasquez, Jorge Arturo
Entre los años 2001 al 2006, se evaluaron plantaciones demostrativas de bolaina blanca (Guazuma crinita Mart.) en tres sectores de la cuenca del río Aguaytı́a que tenían como uso anterior un cultivo de yuca, purma de 3 años y cultivo de maíz en los sectores 1, 2 y 3 respectivamente. Utilizando modelos de predicción de volumen y biomasa en función a la edad de la plantación se determinó la viabilidad técnica‑económica de plantaciones a los seis años de edad en un escenario de venta de tablillas, tucos y cantoneras (bienes) y captura de CO2eq (servicios) actualizados al año 2022 con una TEA del 22%. Tuvieron un valor actual neto (VAN), tasa interna de retorno (TIR) y relación beneficio/costo (B/C), de S/. 8408,67; 60,9% y 1,58 para el sector 3; S/.967,23; 26,5% y 1,07 para el sector 2 y S/. ‑7 945,28; 0,0% y 0,14 para el sector 1, los mismos que estuvieron influenciado principalmente por ingresos generados por la venta de tablillas de madera y la venta de flujos positivos de servicios de captura de carbono, los mismos que resultaron del establecimiento de plantaciones en suelos donde el uso anterior fue un cultivo anual. Por lo que las plantaciones del sector 3 y 2 fueron técnica‑económicamente viables, mientras que las plantaciones del sector 1 no lo fueron.