Se evaluó el efecto bioprotector de tres consorcios de hongos micorrízicos arbusculares nativos en plantones de tres variedades de Coffea arabica L., propagados sexual y asexualmente frente al ataque de la roya amarilla (Hemileia vastatrix). La investigación fue desarrollada en Chirapa – Lamas, bajo condiciones de vivero y en el Laboratorio de Micorrizas del IIAP, Tarapoto - San Martín. Se usó el Diseño Completamente al Azar con arreglo factorial de 3A x 2B x 4C, siendo A: variedades de café (caturra, pache y nacional), B método de propagación (sexual y asexual) y C: consorcios de HMA nativos (de las provincias de Moyobamba, El Dorado y Huallaga) comparados con un testigo, resultando 24 tratamientos, 9 plantas/ tratamiento y 216 unidades experimentales. En el repique de las plántulas se inoculó con 1500 esporas de HMA nativos y un mes después fueron instalados en el vivero ...

Introduction: Land-use change from primary forests to agricultural croplands can degrade soil quality by depleting soil organic carbon (SOC), total nitrogen (STN), and soil-available potassium (SAK). The magnitudes and thresholds of these losses in the Peruvian Amazon remain insufficiently quantified. Methods: We assessed six land-use systems—two primary forests and four croplands (coffee, cocoa, oil palm, camu camu)—collecting 72 surface soil samples (0–20 cm) from 12 subplots per system using pit sampling. SOC, STN, and SAK were measured with standard laboratory procedures and compared across land uses. Results: The humid primary forest (WE–PF) had the highest nutrient status (SOC 118.99 t C ha⁻¹; STN 0.35%; SAK 181.83 mg kg⁻¹). The lowest values occurred in croplands, especially camu camu (SOC 23.93 t C ha⁻¹; STN 0.08%). Forest-to-cropland conversion was associated wi...

What is the potential impact on carbon storage of the native and introduced tree species commonly associated with coffee in the central Peruvian Amazon? Coffee is a pivotal crop within the Peruvian economy. Nevertheless, the establishment of new plantations—driven by the subsistence needs of smallholder farmers—has led to expansion into forested areas. Given the significance of this crop and the demonstrated ecosystem benefits of agroforestry systems (AFSs), the aim of this study was to evaluate the influence of native and introduced shade tree species on carbon storage in coffee plantations. This study was observational and exhibited characteristics of an unbalanced incomplete block design. Agroforestry systems (AFSs) with shade tree species such as Inga, Retrophyllum rospigliosii, Eucalyptus and Pinus, and three unshaded coffee plantations, were included in this study. The total ca...