Browsing by Autor "Marcela Daniela Mollericona Alfaro"

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Bioestimulantes en portainjertos de cítricos en fase inicial de vivero, Estación Experimental Sapecho – La Paz
(2023) O. Flores; Marcela Daniela Mollericona Alfaro
Un aspecto muy importante y poco estudiado en la producción de cítricos en la región de Alto Beni, son los portainjertos (limón rugoso, volkameriano, citrange carrizo y mandarina cleopatra) en ese sentido se vio necesario evaluar el efecto de la aplicación de diferentes bioestimulantes (biol, té de humus, Trichoderma harzianum) en el desarrollo de los mismos en etapa de vivero, además que por sus diferentes características de desarrollo permitirían determinar el tiempo óptimo para la injertación. El periodo de evaluación abarcó 135 días después del repique en el vivero permanente de la Estación Experimental de Sapecho, el diseño estadístico fue completamente al Azar con dos factores y tres repeticiones, factor A: 4 Portainjertos y factor B: 3 bioestimulantes y un testigo, habiéndose obtenido resultados donde se observa que no hay diferencias significativas con la aplicación de los bioestimulantes para las variables: altura de planta (cm), diámetro de tallo (mm) y número de hojas, sin embargo se evidenciaron diferencias significativas entre los portainjertos, obteniendo los mayores promedios en las tres variables evaluadas con limón rugoso, volkameriano y carrizo, mostrando que el diámetro óptimo para la injertacion debe ser mayor a 4 mm, lo que se alcanza a partir de los 105 días.
Diferentes sustratos para producción de portainjertos de cítricos (Citrus sp.) en vivero, Estación Experimental Sapecho
(2025) Marcela Daniela Mollericona Alfaro
La elección de un buen portainjerto influirá de gran manera en la producción de las diferentes especies y variedades de cítricos. La investigación tuvo el propósito de determinar los efectos de diferentes sustratos en el desarrollo de portainjertos en fase inicial de vivero y el tiempo óptimo para la injertación, para ello se evaluó a Limón volkameriano (Citrus volkameriana Pasq), Limón rugoso (Citrus jambhiri, Lush), Citrange carrizo (Poncirus trifoliata x Citrus sinensis) y Mandarina cleopatra (Citrus reshni. Hort ex Tan) con la aplicación de sustratos a base de: Bocashi, Humus de lombriz, Compost y Testigo (sustrato común) en el vivero de la Estación Experimental Sapecho, El diseño utilizado fue el Completamente al Azar con dos factores y tres repeticiones, considerando el factor A: Portainjertos y factor B: Sustratos y un testigo. Los resultados evidenciaron la existencia de diferencias estadísticamente significativas con el efecto de los abonos Humus de lombriz y Compost, en relación con el comportamiento de las variables evaluadas:altura de planta(cm), diámetro de tallo(mm), número de hojas. Con relación al tiempo óptimo para la injertación se determinó que Citrange carrizo, Limón volkameriano yLimón rugoso alcanzaron valores aceptables a los 90 días con un diámetro de tallo mayora los 4 mm y altura de planta mayor a 20 cm, a diferencia de Mandarina cleopatra que obtuvo esos valoresa los 120 días.
Efecto de Trichoderma harzianum en portainjertos de cacao (Theobroma cacao L.) en fase inicial de vivero, una alternativa ecológica para mejora del cacao boliviano
(Selva Andina Research Society, 2025) Esther Calle Laime; Marcela Daniela Mollericona Alfaro; Freddy Antonio Cadena Miranda; Casto Maldonado Fuentes
Cocoa, a crop of importance for Bolivia, whose production exhibits different problems in the nursery phase, such as growth problems and disease attacks. An alternative is the use of Trichoderma harzianum. Thus, this study proposed to evaluate the effect of different doses (0, 80, 100 and 120 %) with 2 types of rootstocks: Bolivian national cocoa and foreign cocoa. A fully randomized two-factor design was used, with 8 treatments and 3 replicates. The application of T. harzianum was carried out in 2 stages, the first 15 days before planting in a double dose for establishment and the second every 15 days after planting. For plant height at 105 days, highly significant differences were obtained for the 2 factors with an average of 41.14 cm, in foreign cocoa and Bolivian national cocoa with 35.68 cm with the dose of 120 %, which compared to the controls significantly increased their height. For stem diameter, there were also highly significant differences with an average of 6.98 mm, for foreign cocoa and Bolivian national cocoa with 6.57 mm in the 120 % dose, while for the number of leaves, highly significant results were obtained onlyafter 105 days (120 % dose). It is concluded that the application of T. harzianum at the 120 % dose promotes the growth of Bolivian national cocoa seedlings, which is characterized by requiring a longer period of development in the nursery, compared to foreign cocoa.
Sistema de planificación del estado (SPIE), herramienta para el desarrollo prospectivo e integral en Bolivia
(2022) Marcelo Tarqui Delgado; Marcela Daniela Mollericona Alfaro; Freddy Carlos Mena Herrera; Maria Eugenia Cari Mamani
Law No. 777 of January 21, 2016, enacts and implements the Law of the Comprehensive State Planning System (SPIE). The purpose of this law is to establish the mechanisms of the Bolivian national planning system, and determines the procedures to be carried out for the planning of the integral development of the Plurinational State of Bolivia within the framework of Vivir Bien. The purpose of this research document is to present the foundations and concepts that support the state planning system (SPIE), as planning instruments in prospective and comprehensive development in Bolivia, in its different characteristics, such as hierarchy. The document was carried out through an exploratory and descriptive evaluation of documents concerning and related to concepts of Planning for Sustainable Development and territorial planning in Bolivia, such as norms and plans of the institutions involved in the Planning systems, at the same time the use of the historical method in which, through it, a remembrance of processes that occurred in the country was carried out, related to the processes and/or planning systems, strategies currently developed in the country.
Trabajos de investigación realizados en la Estación Experimental Patacamaya, Facultad de Agronomía-UMSA: una sistematización y estudio bibliométrico
(2022) Marcela Daniela Mollericona Alfaro; Marcelo Tarqui Delgado; Medardo Wilfredo Blanco Villacorta
The Patacamaya Experimental Station (EEP), which depends on the Faculty of Agronomy of the Universidad Mayor de San Andrés (UMSA), stands out as an important center dedicated to agricultural research in the highlands of La Paz, Bolivia. Therefore, the objective of this study was to describe the scientific production of the EEP, period 2008-2022, carrying out a bibliometric, documentary, descriptive, longitudinal and retrospective study. The data source was the research works available in the Institutional Repository of the School of Agronomy (undergraduate and master's theses, supervised works, dissertations) using bibliometric indicators such as: productivity per year, articles produced, type of modality, production index. The inclusion criteria identified 72 publications and 17 topics: quinoa, potato, vegetables, pastures and/or native species, irrigation, camelids, sheep, guinea pigs, vermiculture, forestry, aromatic plants, microorganisms, other Andean crops, birds, soils and water resources. According to the Productivity Index (PI), the years 2016, 2020 and 2021 correspond to a "large producer" rating, while from 2008 to 2015 the PI categorizes the EEP as a "medium producer". For the number of publications per year, there is an increasing linear trend (R2=0.7889), with an average of 6.36 papers and a maximum of 11. By type of modality, undergraduate theses predominate, followed by graduate theses, dissertations and supervised works (88.89, 6.94, 2.78 and 1.39 %, respectively). By subject matter, undergraduate and graduate theses related to vegetables are predominant, followed by studies on irrigation, quinoa, guinea pigs, fodder, camelids, sheep and potatoes.