Examinando por Autor "Padilla Castro, Cesar Franco"

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Native microbial consortia: A sustainable strategy for improving the quality of forest seedlings in the Peruvian Amazon
(MDPI, 2025-02-10) Amaringo Cordova, Luiz Paulo; Mori Montero, Cesar; Padilla Castro, Cesar Franco; Ocaña Reyes, Jimmy A.; Riveros Lizana, Christian Alonso; Camacho Villalobos, Alina Alexandra; Solórzano Acosta, Richard Andi
Forest plantations represent an alternative to reduce timber extraction pressure in the Amazonian forests. In order to tolerate the hostile field conditions of deforested areas, high-quality seedlings are required. This study aimed to find the optimal dose of a native microbial consortium (NMC), which enhances seedling quality indicators, in three forest species at nursery phase. A completely randomized design (3 × 5) was used. Factor 1: Bolaina blanca (Guazuma crinita Mart.), Capirona (Calycophyllum spruceanum Benth. Hook. f.), and Marupa (Simarouba amara Aubl.). Factor 2: Incremental doses of 0, 160, 320, 480, and 640 mL NMC per plant. The nursery survival (%), robustness index, root height/length ratio, shoot–root index, Dickson Quality Index (DQI), Nitrogen (%), Phosphorus (%), and Potassium (%) content in tissues were analyzed. Statistical analyses consisted of two-way ANOVA per variable and correlation analysis. The results indicated that increasing doses of NMC did not improve nursery survival for any species; did not decrease the robustness index, plant height/root length ratio, or the shoot–root index for any species; and did not increase the DQI, P%, or K% for any species; however, they did increase the N% for all species. In conclusion, the incremental dose of 160 mL was chosen for increasing the N% without affecting nursery survival.
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.