http://rid.unrn.edu.ar:8080/handle/20.500.12049/197 2026-04-07T03:00:27Z 2026-04-07T03:00:27Z Ocampo, Marcos Alfredo http://rid.unrn.edu.ar:8080/handle/20.500.12049/13510 2025-09-29T14:09:32Z 2023-10-10T00:00:00Z

Título: Evaluación del impacto sobre el suelo y el rendimiento de un cultivo de maíz dulce para choclo fresco (Zea mays) con vicia (Vicia villosa) en un planteo hortícola comercial del suroeste de Río Negro. Autor(es): Ocampo, Marcos Alfredo Abstract: The earliest known agricultural systems consisted of mixed crops of desirable species that would meet the community's food, fiber, and other needs and—to a certain extent—mimic the natural ecosystem and its diversity. In this historical context, monocultures are a relatively recent innovation (Francis, 1989). Currently, multiple cropping occupies most of the cultivated areas in West Africa. In tropical Latin America, a large portion of staple crops are produced under this system. Multiple cropping can also be found in temperate zones in relatively large, mechanized production units with access to capital markets (Liebman, 1999). Multiple cropping is a tool for intensification over time and space that can be summarized as the planting of more than two crops in the same year on the same plot. This intensification can be carried out either as sequential or intercropping. Sequential crops can be double, triple, or quadruple cropped depending on the number of harvests per year, and in these cases, intensification occurs in the temporal dimension (Francis, 1989). Within this sequence of crops grown consecutively on the same site, crops that provide other services are often incorporated, currently referred to as service crops (SC). SCs are herbaceous crops, mostly grasses and legumes, planted in rotation between two cash crops. SCs have traditionally been cultivated for various purposes, such as preventing erosion, increasing soil carbon and nitrogen, reducing nitrate leaching, and increasing soil porosity (Ruffo & Parsons, 2004). Like a wide variety of technologies, cover crops have been used since ancient times by various cultures who observed how this practice improved crop yields and recovered impoverished lands (Haider, Cheema, & Farooq, 2019). Cover crops were created to keep the soil covered during fallow periods between harvest crops, and for this reason, they were originally called cover crops. However, with their repeated use, it has been observed that these crops generate multiple benefits, and different names have been proposed based on this. Due to their ability to absorb, retain, and immobilize nutrients from the soil, preventing their loss, they have been called trap crops; because they can serve several purposes simultaneously, they have been called multipurpose crops (Pinto 2012); and more recently, they have begun to be called service crops, since in addition to referring to their multiple purposes, they also refer to the ecological services they provide (Pinto & Piñeiro 2018). (Pinto & Piñeiro, Ecological intensification in the agroecosystems of the Pampas region: the role of service crops, 2018) (Pinto, Evaluation of biological nitrogen fixation and root production in different service crops and their effects on soil organic C and N reserves, 2012) Multiple crops also include intercropping, in which intensification occurs in both temporal and spatial dimensions. These include mixed intercropping, row, strip, and relay intercropping (Francis, 1989). The key to these polycultures is that they must be planted with the necessary spatial proximity to ensure competition or complementarity, thereby increasing overall yields while creating a more sustainable system that conserves resources (Álvarez & Alayon Luaces, 2020).

2023-10-10T00:00:00Z Cortés Pérez, Olayer Pedro Esteban http://rid.unrn.edu.ar:8080/handle/20.500.12049/13509 2025-09-29T14:09:23Z 2025-04-05T00:00:00Z

Título: Efecto del uso forestal y ganadero sobre aspectos físicos y biológicos del suelo y la relación con sus funciones en bosques de Austrocedrus chilensis del Sudoeste de Río Negro. Autor(es): Cortés Pérez, Olayer Pedro Esteban Abstract: Research related to the impacts of forestry and livestock activities on the soils of Andean-Patagonian forests is scarce, and it is important to increase knowledge about this key component because of its link to multiple functions and ecosystem services. In this sense, the aim of this work was to study the effect of forest and livestock use on physical and biological aspects of the soil and the relationship with its functions in A. chilensis forests in southwestern Río Negro. For this purpose, 57 stands with different intensities of livestock (IUG) and forest (IUF) use were sampled. The intensity of use was determined by the number of stools and stumps per transect. Soil structural stability (SSS), unsaturated hydraulic conductivity (Ku), soil organic matter (SOM), particulate organic matter (POM), organic matter associated with mineral fraction (MAOM) and root density (RD) were determined at each site. Generalised linear models (GLM), selected for their Akaike information criterion (AIC) after testing their suitability by visual assessment of the homogeneity and normality of the residuals, were used to analyse the relationship between the intensity of use and the variables considered. DR and MOAM were significantly related to changes in IUG. This suggests that multiple soil functions could be affected. However, given the high resilience of these soils, such effects on soil functions may not be observed in practice. Finally, it is important to continue investigating the possible implications of silvopastoral activities in these ecosystems, in order to promote more sustainable management of the natural commons.

2025-04-05T00:00:00Z John, Camila Ailén http://rid.unrn.edu.ar:8080/handle/20.500.12049/13493 2025-10-20T12:01:34Z 2025-04-28T00:00:00Z

Título: Sustentabilidad socio-productiva de los recursos forrajeros en el Valle de El Manso. Autor(es): John, Camila Ailén Abstract: Forage resources are of great importance for livestock production and the ecosystem in which they are embedded, due to their relevance in providing feed for livestock, considering both its quality and quantity. Thus, the quality, composition, and productivity of these resources depend on various factors, one of the most important being the management applied. Some studies suggest that, in the region, forage management directly influences socio-productive sustainability, encompassing environmental, economic, and cultural aspects. Therefore, it is possible to analyze it from the perspective of forage management and balance (supply and demand). Regarding forage supply, there is significant heterogeneity, including natural grasslands, mono- or poly-specific pasture crops, reserves, and green forages, among others. Forage demand can be calculated in energy terms and reflects the animals’ needs to perform their biological and physio-productive functions. In this study, forage balance was used as a strategic tool for the agroecological management of livestock production, as it provides a diagnosis of the sustainability of the available resources. This study focused on data from forage production representing each of the different sectors: Manso Inferior, Manso Medio, and El Foyel. To analyze socio-productive sustainability in the management of forage resources in the El Manso Valley, several objectives were pursued. First, the available information on forage production in the El Manso Valley was systematized. Second, the socio-productive information of producers involved in forage production was updated and classified according to a previous typology. Finally, forage management was surveyed and compared in selected production units within the watersheds that make up the El Manso Valley, based on the determination of the annual forage balance. The main results and conclusions of this work include: the existence of information gaps from an integral agroecological perspective; changes over time in the structure and production strategy of the types and subtypes of producers; persistence of issues such as weed invasion and informal sales; the need to apply forage balance and implement new management strategies; significant variations in forage productivity between and within areas; and the sustainability of forage resources is affected by a series of interrelated factors.

2025-04-28T00:00:00Z Lincan, Ramiro Nahuel http://rid.unrn.edu.ar:8080/handle/20.500.12049/12041 2024-10-14T12:34:08Z 2022-11-24T00:00:00Z

Título: Informe de práctica laboral: Prácticas en viverización en el Jardín Botánico de Denver, Colorado, U.S.A. Autor(es): Lincan, Ramiro Nahuel Abstract: In 2013, Marcela Ferreyra, a professor of Nursery Technician at the National University of Rio Negro (UNRN), was invited to the Denver Botanic Garden (DBG) to present her book Flowers of the Patagonian Steppe. This publication had a good impact at the American Garden, which has in its collection specimens of the steppes of the world, with numerous species belonging to Patagonia. That instance started the link between both institutions that later agreed on a framework agreement of cooperation in which they expressed the desire to establish relations of joint development, complementation and cooperation. In 2016, a proposal was drawn up between the UNRN and Colorado State University (CSU) so that, through the modality of student exchange, advanced students of the Nursery Technician (TEVI) could access to do internships at the Denver Botanic Garden. Once this modality was established, UNRN Andina called for a competition among advanced students, selecting three students with merit to participate, with the author being one of those selected. Based on the experience, the following report is developed, which is a partial version of the exchange experience. Its focus is on the actions carried out as an internal student of the Kindergarten during the more than 70 days between the end of June and the beginning of September 2017.

2022-11-24T00:00:00Z López Lombardo, María Belén http://rid.unrn.edu.ar:8080/handle/20.500.12049/12040 2024-10-09T15:24:15Z 2023-12-19T00:00:00Z

Título: Caracterización de la producción familiar de alimentos a partir de sus aspectos sociales y productivos en el paraje rural Mallín Ahogado Autor(es): López Lombardo, María Belén Abstract: Family-scale production goes beyond the merely productive and is rather a way of life that has the potential to increase the food supply and improve the living conditions of rural populations. It contributes to strengthening the food sovereignty of those who carry it out, since the food produced in family gardens contributes to the family economy and provides health benefits through a healthy and nutritious diet. The objective of this work is to characterize family food production in the rural area of Mallín Ahogado, El Bolsón, Río Negro, by recovering, ordering and updating the written background on the study area in relation to environmental, social and cultural characteristics regarding this type of activity. Also to identify characteristics, problems and opportunities related to the production, commercialization and exchange of food of the families in the area. This research work investigates socio-cultural aspects of the inhabitants of the area. From agricultural practices carried out at present and in the past, the family organization related to these tasks, the composition of family income, local knowledge regarding crop management and animal husbandry, food and medicinal plants, as well as the visions and perceptions of the inhabitants regarding the changes and future projection of the rural area. The profile of the rural inhabitants is redefined based on the combination of activities to generate new ways of life in changing territories. The agroecological approach is considered the appropriate one to observe and analyze these cases since it proposes to broaden the view to contemplate the endless number of aspects that compose it.

2023-12-19T00:00:00Z Sanchez, Pablo http://rid.unrn.edu.ar:8080/handle/20.500.12049/11256 2024-01-31T11:57:26Z 2022-10-12T00:00:00Z

Título: Evaluación de la aplicación de biofertilizantes como herramientas para el manejo de la nutrición de cultivos en sistemas agroecológicos Autor(es): Sanchez, Pablo Abstract: Biofertilizers constitute a biotechnological tool aimed at cultivating the biological diversity of the soils where agricultural production is carried out. This cultivation practice and stimulation of diversity in the soil has an impact on beneficial processes for plants in a multiplicity of aspects: supply of additional nutrients, release of substances that regulate plant growth, production of antibiotics and others. In this work, the use of biofertilizers as a tool for managing crop nutrition in an agroecological system was evaluated. For this purpose, a field trial was carried out located in the territory of the Andean Region of the 42nd Parallel (CAP 42°), specifically in the “Rizoma” farm, located on the Camino de los Nogales towards the Northeast of the city of El Bolsón, Río Negro

2022-10-12T00:00:00Z Bernal, Vanesa Rovaretti, Georgina Velazquez, Sebastián http://rid.unrn.edu.ar:8080/handle/20.500.12049/3248 2019-09-20T15:06:37Z 2019-09-03T00:00:00Z

Título: Caracterización de la organización vecinal del Paraje Entre Ríos y su visión sobre ruralidad, producción y comercialización agropecuaria de la zona Autor(es): Bernal, Vanesa; Rovaretti, Georgina; Velazquez, Sebastián Abstract: This work aims to explore the dynamics of organization both in the social, productive and commercial areas of El Paraje Entre Ríos, Lago Puelo, Chubut, through the eyes of the participants of its neighborhood board. It was made by students of the Degree in Agroecology at the National University of Río Negro, Andean Headquarters, framed within the Chair of Science, Ethics and Socio-Environmental Intervention. The Place Between Rivers is one of the few places in the Andean region of Chubut that has a neighborhood organization as a meeting point for neighbors to raise issues and concerns related to the neighborhood and its possible solutions. Throughout the work we will explain the way in which this administrative unit goes through the problems at hand, pointing out that it in Chubut is a particularity and in Río Negro a normal way of administering. We will analyze how an administrative field is a relevant space to address agroecological dynamics of a territory and we will reflect on specific themes that allow us to illustrate.

2019-09-03T00:00:00Z