Examinando por Autor "Arias Arredondo, Alberto"

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Assessment of soil characteristics and the productive potential of native Poaceae forage species in the Central Highlands of Peru
(Polish Society of Ecological Engineering, 2025-06-10) Arias Arredondo, Alberto; Yalli Huamaní, Teodoro Bill; Cruz Luis, Juancarlos Alejandro; Requena Rojas, Edilson Jimmy; Solórzano Acosta, Richard Andi
Given the increasing pressure on natural grassland ecosystems in the Peruvian high Andes, optimizing the use of native forage species has become essential for understanding the relationship between soil characteristics and the productive potential of these plants. This study evaluated the relationship between soil properties and the produc tive potential of three native forage species: Festuca dolichophylla, Cinnagrostis vicunarum, and Jarava ichu. The research was conducted in natural grasslands in the district of Yauli, province of Yauli, department of Junin, at approximately 4000 m.a.s.l. During the dry season 2023, soil samples were collected following standardized protocols, and key soil parameters were analyzed. The nutritional characteristics of the forage species were also assessed, including dry matter content, total protein, calcium, phosphorus, in vitro organic matter digestibility, and metabolizable energy. The results revealed significant differences among species. Festuca dolichophylla exhibited the highest protein content (10.7%), superior digestibility (52.5%), and greater metabolizable energy (8.4 MJ∙kg-1), making it the most suitable forage option for livestock in the highland ecosystem over 4000 m.a.s.l., where en vironmental factors constrain agricultural activity. In contrast, Cinnagrostis vicunarum and Jarava ichu showed lower protein levels, with Jarava ichu displaying particularly low digestibility (28.9%) and energy content (4.6 MJ∙kg-1), limiting its productive potential despite its high dry matter yield. These findings provide a strong scien tific foundation for developing sustainable grassland management strategies in the Peruvian Andes, supporting the implementation of agronomic practices that enhance forage productivity while contributing to biodiversity conser vation. Moreover, this study highlights the importance of soil characterization as a key tool for optimizing forage resource utilization in high-altitude farming systems, facilitating informed decision-making in land management and environmental remediation policies.
Evaluación de la calidad nutricional del heno de avena (Avena sativa), ensilado (Avena sativa asociada con Vicia sativa) y pasto natural en la cuenca Mantaro del Perú
(2024-04-01) Arias Arredondo, Alberto; Pantoja Aliaga, Cesar; Cruz Luis, Juancarlos Alejandro; Contreras Paco, Jose; Sanchez Villanueva, Humberto; Solórzano Acosta, Richard Andi; Lopez Rodriguez, Melina
Los pastos cultivados, así como los pastos naturales son importantes para el desarrollo de la ganadería en los andes del Perú, así como su conservación mediante el heno y ensilado. Sin embargo, en la práctica al ser el recurso alimenticio limitado se debe optar por todas estas opciones en la medida que se garantice el equilibrio de la dieta del animal, pero cada tipo tiene su propia calidad nutricional y esta información debe conocerse para planificar las acciones que maximicen la crianza. Por ello el objetivo de la investigación fue comparar la calidad nutricional del heno de avena, ensilado de avena asociada con vicia y pasto natural. En cuanto a la calidad nutricional, se evaluaron proteína total (PT), grasa (EE), fibra cruda (FC), ceniza (CZ), extracto libre de nitrógeno (ELN), calcio (Ca), fósforo (P), fibra detergente neutra (FDN) y ácida (FDA) y energía bruta (EB). Se utilizó el Diseño Completamente al Azar (DCA) para el análisis de varianza y para comparar las medias entre tratamientos la prueba de diferencia límite de significancia. Las medias de valores nutricionales en PT fueron de 6.26% en el ensilado respecto al heno y pasto natural. El pasto natural obtuvo un valor de 386.92 kcal /100 g MS en energía bruta у 22.24% en FC siendo superior al resto de tratamientos. La FDN y FDA, expresaron valores de 35.64% у 21.70% menores en el ensilado considerados óptimos. El Ca y P tuvieron variaciones de forma estadística y numérica que permite clasificar al ensilado, heno y pasto natural como alimentos de alta calidad nutricional para los rumiantes.
Evaluation of nutrient extraction and uptake by forage grasses under high Andean mountain conditions in Peru
(Asian Journal of Agriculture and Biology (AJAB), 2026-03-20) Arias Arredondo, Alberto; Lopez Rodríguez, Melina; Cruz Luis, Juancarlos Alejandro; Requena Rojas, Edilson Jimmy; Ccopi Trucios, Dennis; Pizarro Carcausto, Samuel Edwin; Solórzano Acosta, Richard Andi
This study evaluated nutrient extraction and uptake in native forage grasses (Festuca dolichophylla and Calamagrostis chrysantha) and improved species (Lolium perenne and Dactylis glomerata) at 4,100 m a.s.l. in the Peruvian Andes using a completely randomized design. Results revealed significant interspecific variability in nutrient accumulation. Dactylis glomerata showed superior macronutrient accumulation, particularly Mg, while Lolium perenne achieved highest K extraction (0.07 t ha⁻¹) and biomass production. Native species demonstrated lower nutritional demands: Festuca dolichophylla reached maximum dry matter production (6 t ha⁻¹), while Calamagrostis chrysantha showed elevated Ca and P concentrations. Correlation analysis revealed strong positive associations among Ca, Mg, Cu, Fe, Mn, and Zn (r = 0.7-1.0), indicating coordinated uptake mechanisms. Nickel exhibited negative correlations with P (r = -0.6) and K (r = -0.5). Improved species require intensive fertilization, while native species offer sustainable alternatives for low-input high-altitude systems.
Production of biochar derived from guinea pig manure as a soil amendment in high Andean and coastal acidic soils in Peru: agronomic potential and cost analysis for sustainable circularity
(Frontiers Media SA, 2026-03-17) Solórzano Acosta, Richard Andi; Damián, Lucía; Herrera, Sherly; Pichis García, Roger; Cabello Torres, Rita; Padilla Castro, Cesar Franco; Arias Arredondo, Alberto; Chávez Collantes, Azucena; Vallejos Torres, Geomar
Introduction: The valorization of local resources, such as guinea pig manure, allows traditional inputs to be transformed into more stable products with higher added value, such as biochar, rather than being used as raw manure. Methods: This study evaluated the physicochemical properties, toxicity, and neutralizing capacity of biochar obtained from guinea pig manure, produced by open pyrolysis in a pyrolytic oven in Huancayo, Junin, Peru. Fresh manure was also characterized prior to pyrolysis, and its median lethal dose was determined. Results: The results indicated that guinea pig manure had an approximate volume of 2,883.99 cm3 in an uncompacted state and 2,205.41 cm3 in a compacted state, with densities of 0.293 and 0.380 kg/cm3, respectively. Guinea pig manure biochar has high N, P, and K contents, as well as a significant percentage of ash (34.6%) and fixed carbon (37.9%). Its alkaline pH (9.17), high cation exchange capacity (48.8 meq/100 g), and high organic matter content (62%) suggest its potential for improving acidic soils. It also has a considerable moisture content (34.8%) and microelements such as Mg, Cu, Ca, and Zn. In economic terms, the production of 1 ton of guinea pig manure has an estimated cost of 231.23 soles, while the sale price of biochar reaches 3,515.31 soles per ton, demonstrating its high added value. Discussion: Biochar derived from guinea pig manure has a superior nutritional profile compared to biochars obtained from plant biomass, making it a viable alternative for agriculture. Its application, however, must take into account specific safety tests for each crop to ensure both safety and effectiveness.
Yield estimation based on agronomic traits in vegetables under different biochar levels
(Elsevier B.V., 2025-09-29) Ccopi Trucios, Dennis; Requena Rojas, Edilson Jimmy; Arias Arredondo, Alberto; Taipe Crispin, Maglorio; Marcelo Matero, Jhonny Demis; Pizarro Carcausto, Samuel Edwin
Biochar, a carbon-rich material produced through oxygen-limited pyrolysis of organic biomass, demonstrates exceptional potential as a soil amendment due to its porous structure and stability. This research investigated the impact of guinea pig manure biochar on three vegetable species cultivated in high Andean conditions: spinach (Spinacia oleracea L.), cabbage (Brassica oleracea var.), and chard (Beta vulgaris var.). The study implemented four biochar application rates (0, 10, 20, and 30 t/ha) and measured comprehensive agronomic parameters including leaf count, leaf length, and fresh/dry biomass of both leaves and roots. Simultaneously, UAV-captured multispectral imagery provided spectral indices that were integrated with agronomic data into machine learning models: linear regression, support vector machines (SVM), and regression trees (CART). Results demonstrated significant vegetative growth enhancement and yield increases across all crops, with the 30 t ha-1 application rate producing optimal outcomes. Predictive modeling exhibited remarkable accuracy: spinach analysis via SVM achieved R² = 0.94 and RMSE = 0.32 g; chard analysis through CART delivered R² = 0.92 and RMSE = 0.35 g; and cabbage assessment using CART yielded R² = 0.91 and RMSE = 0.38 g. This research substantiates biochar’s effectiveness as an organic amendment while establishing a reliable framework for crop yield prediction using machine learning algorithms integrated with spectral data. These findings position biochar as a valuable component in sustainable agricultural systems, particularly for vegetable production in challenging high-altitude environments.