Examinando por Autor "Calle Iparraguirre, Nander Oriol"

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Determinación de plomo y cadmio en frutos de Mangifera indica L. (mango) cercanos a pozos de oxidación
(Universidad Nacional de Trujillo - Facultad de Ciencias Biológicas, 2026-01-29) Alarcon Cruz, Neidi; Peláez Gonzales, Romario Anibal; Chico Ruíz, Julio Roger; Campos Ruiz, Joseph; Campos Ruiz, Sanderson Narcizo; Calle Iparraguirre, Nander Oriol; García Carrasco, Elfer
Los metales pesados constituyen una de las principales fuentes de contaminación ambiental debido a su persistencia, bioacumulación y efectos adversos sobre los ecosistemas y la salud humana. El presente estudio tuvo como objetivo determinar las concentraciones de plomo (Pb) y cadmio (Cd) en frutos de Mangifera indica L. cultivados en áreas adyacentes a pozos de oxidación en el distrito y provincia de Jaén, Perú. La cuantificación de los metales se realizó mediante espectrofotometría de absorción atómica, siguiendo la normativa USEPA (1996) y el método 3052. Los resultados indicaron que el 33,3 % de las muestras superaron los límites máximos permisibles de Pb y el 3,33 % excedieron los valores establecidos para Cd, conforme al Codex Alimentarius, la Unión Europea y la legislación rusa. Asimismo, se observó mayor concentración de Pb en frutos de la parte inferior de la copa y de Cd en la zona media. En conclusión, los frutos evaluados no son aptos para consumo humano, representando un riesgo potencial para la salud pública.
Determinants of compost quality across 12 agroecological zones of Peru: the role of regional organic waste and climatic conditions
(Frontiers Media S.A., 2026-07-02) Hermoza Ayme, Nilton Alexander; Aldava Pardave, Uriel; Ortíz Dongo, Luis Felipe; Palomino Espinoza, Claudio Carlos; Altamirano Quispe, Brandon Santiago; Collavino Cortez, Ulises Ronald; Ore Valeriano, Ruddy Adely; Reza Carlin, Luis Joel; Calle Iparraguirre, Nander Oriol; Peña López, Yerly Marquito; Abensur Diaz, Giancarlos Israel; Suasaca Curo, Abel; Cunyas Camayo, Joseph Michael; Solórzano Acosta, Richard Andi
Introduction: Composting is a cornerstone of the circular economy in agriculture; however, its efficacy is often undermined by limited knowledge regarding how agroclimatic variability influences compost quality under real-world conditions in megadiverse countries such as Peru. Methods: We monitored twelve composting processes over a 16-week period, established at agricultural experimental stations across 12 agroecological zones in Peru—spanning the arid coast, the high Andes, and lowland/high-jungle environments. The study utilized locally representative organic residues and employed a multisite observational design analyzed via generalized linear mixed models (GLMM). Results: High-Andean sites, characterized by low ambient temperatures and quinoa residues, exhibited the highest organic carbon retention and biological stability. In contrast, lowland jungle stations showed accelerated mineralization and suboptimal organic matter content (≈12%), failing to meet national standards. In coastal regions, guinea pig manure helped minimize lead accumulation; however, arsenic concentrations exceeded international safety limits (40 mg kg⁻¹) at certain stations. Furthermore, fixed effects (climate and process parameters) explained more than 67% of the variation in organic matter and nitrogen, while the agroecological context accounted for ≈23% of the variability in yield. Discussion: These findings indicate that compost quality is driven by non-linear interactions between temperature, humidity, pH, electrical conductivity, and regional residue composition, demonstrating that "one-size-fits-all" protocols fail to capture these complex dynamics.