Examinando por Autor "Amaringo Córdova, Luiz Paulo"

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Bioestimulantes en la agricultura: Extractos húmicos
(Instituto Nacional de Innovación Agraria (INIA), 2026-01) Amaringo Córdova, Luiz Paulo; Camacho Villalobos, Alina Alexandra
Un bioestimulante vegetal es una sustancia o microorganismo que, aplicado a la planta o a la rizósfera -independientemente de su contenido de nutrientes-, estimula procesos naturales de nutrición, con el fin de mejorar la eficiencia en el uso de nutrientes, la tolerancia al estrés abiótico y también la disponibilidad de nutrientes. A diferencia de los fertilizantes que suministran nutrientes, los bioestimulantes trabajan en mejorar la absorción y eficiencia nutricional, así como en aumentar la resistencia al estrés abiótico. Pueden incluir extractos húmicos, macro y microalgas, hidrolizados de proteínas de origen animal o vegetal, silicio, extractos de plantas, hongos micorrizas arbusculares y rizobacterias promotoras del crecimiento vegetal. Pueden contener hormonas vegetales, extractos de algas marinas, aminoácidos, enzimas, vitaminas como la tiamina.
Biofermentos_biol elaborado a partir de la reproducción de microorganismos benéficos del bosque
(Instituto Nacional de Innovación Agraria (INIA), 2026-04) Amaringo Córdova, Luiz Paulo; Mori Montero, César
Son bioinsumos líquidos que se generan a partir de procesos de fermentación donde intervienen microorganismos benéficos presentes en el entorno. Estos microorganismos son recolectados y posteriormente cultivados en condiciones controladas, generalmente sin presencia de oxígeno, lo que favorece su crecimiento y multiplicación durante un periodo determinado. La cantidad de microorganismos que se logra desarrollar es un aspecto fundamental, ya que influye directamente tanto en el tiempo de elaboración como en la calidad final del producto obtenido. En la práctica, los bioles se consideran una alternativa eficiente frente a los fertilizantes químicos de alta solubilidad. Su uso se ha extendido especialmente en sistemas de producción orgánica, debido a que son fáciles de preparar y contribuyen positivamente tanto a la nutrición de las plantas como a la mejora de las condiciones del suelo.
Dimensional stability and technological performance of 13-year-old Simarouba amara Aubl. thinning wood: pathways to high-value product development
(MDPI, 2026-08-04) Amaringo Córdova, Luiz Paulo; Ucañay Ayllon, Tatiana Mildred; Rodriguez Sotelo, Jefferson Alexander; Fasabi Pashanasi, Hilter; Mori Montero, Cesar; Ruiz Torres, Oscar Amado; Guerra Arévalo, Wilson Francisco; Guerra Arévalo, Héctor; Aldava Pardave, Uriel; Bernaola-Paucar, Rosario Marilú; Vásquez Vela, Ana Lucía Milagros; López Galán, Edinson Eduardo; Hemeryth Bartra, Jhinmy Karc; Rodriguez Vasquez, Kevin Isaac
The valorization of wood derived from thinning operations in tropical plantations represents an alternative to enhance the sustainability and profitability of forest production systems. This study evaluated the hygroscopic, physical, and machining properties of 13-year-old Simarouba amara Aubl. thinning wood obtained from a plantation established in the Peruvian Amazon. Two planting spacings (2 × 2 m and 3 × 3 m) and three longitudinal stem positions (base, middle, and apex) were analyzed using a factorial design and generalized linear mixed models. Planting density and longitudinal position significantly influenced (p < 0.05) most of the evaluated properties. The saturated moisture content increased from 96.17% at the base to 135.42% at the apex, whereas basic density decreased from 0.45 to 0.30 g cm⁻³. Volumetric shrinkage ranged from 10.19% to 14.81%, and the dimensional stability index varied between 1.66 and 1.91. The first principal component (PC1) explained 98.4% of the total variance and clearly differentiated the treatments. The wood exhibited excellent performance in planing and molding, good performance in drilling, and fair performance in turning, indicating strong potential for the manufacture of higher value-added products and for sustainable utilization in tropical plantation forests.
Inoculation with Trichoderma in Coffea arabica seedlings: Effects on morphological indices and seedling quality under nursery conditions
(MDPI, 2026-08-04) Camacho Villalobos, Alina Alexandra; Amaringo Córdova, Luiz Paulo; Ucañay Ayllon, Tatiana Mildred; Salgado Veramendi, Noelito; Flores Jaramillo, Jhoffre David; Aldava Pardave, Uriel
Microbial inoculants such as Trichoderma have been proposed as sustainable tools to improve seedling quality in coffee nurseries; however, their effectiveness may vary according to formulation and genotype. This study evaluated three treatments: a solid Trichoderma formulation (1 kg m−3 of substrate) based on a multispecies consortium (T. harzianum, T. asperellum, and T. viride; 5 × 109 conidia g−1), a liquid formulation of T. harzianum (1 × 108 CFU mL−1; 1 L m−3 of substrate), and a non-inoculated control, using three Coffea arabica varieties (Catimor, Marsellesa, and Gran Colombia) under controlled nursery conditions. A linear mixed model was applied, considering variety and inoculant type as fixed effects and replicates as random effects. The results show that the biostimulant response is strongly modulated by the variety × inoculant interaction. The solid formulation was superior in promoting the expansion of the photosynthetic apparatus, increasing leaf area by 24.6%. In turn, the liquid formulation optimized structural vigor, increasing stem diameter by 17.3% and reducing slenderness by 13.1%. Inoculation reduced the lignification index by 10.4%, favoring dynamic vegetative growth. These improvements were integrated into the Dickson Quality Index, which reached values of 0.41–0.70, greatly exceeding the critical threshold of 0.20 for medium- to high-quality seedlings. It is concluded that Trichoderma acts as a physiological compensator that harmonizes plant architecture, although its efficacy depends on specific compatibility with the genotype, which is essential for ensuring the successful establishment of coffee plants under field conditions.
Nursery management modulates biomass allocation and early field establishment of Pinus douglasiana Martínez
(MDPI, 2026-08-20) Bernaola Paucar, Rosario Marilu; Ruiz Blandon, Bayron Alexander; Alama Flores, Marcos; Amaringo Córdova, Luiz Paulo; Rodríguez Cangalaya, Nora; Colachagua Calderon, Deysi Alina; Nieto Ramos, Carlos Emérico; Nieto Ramos, Luis Armando; Cuadrado Campó, Walter Javier
Nursery decisions influence the condition of seedlings before outplanting, but their practical value depends on whether those traits remain evident during early field establishment. We evaluated Pinus douglasiana Martínez seedlings grown under eight combinations of container volume, fertilization, and irrigation regime. Seedlings were conditioned for six months in the nursery and then assessed after 12 months under field conditions. Container volume was the clearest source of variation. Compared with 1 L containers, 5 L containers produced seedlings with larger root collar diameter, greater shoot, root, and total biomass, and higher Dickson quality index. Total biomass was 2.2-fold greater in 5 L stock. Final survival was retained as a descriptive field variable and averaged 76.7% in 5 L treatments and 27.5% in 1 L treatments. Correlations based on treatment means associated total biomass with field diameter and descriptive survival, although these patterns were exploratory because only eight treatment means were available. Proline increased mainly under non-continuous irrigation, indicating a water-related nursery response, but it was not aligned with biomass production or first-year field performance. The treatment-level PCA separated biomass and field-growth variables from proline and lignification. These results show that larger containers improved the structural condition of P. douglasiana planting stock, although nursery costs, planting-site constraints, and longer monitoring should be considered before operational adoption.