Examinando por Autor "Oliva Cruz, Segundo Manuel"

Mostrando 1 - 2 de 2

Diversity of Cucurbita moschata Duchesne (loche and cushé) and Cucurbita ficifolia Bouché (chiclayo) in Southern Amazonas, Perú
(USDA ARS U.S. Vegetable Laboratory, 2023-07-17) Gill, Elizabeth R.A.; Ogden, Andrew B.; Oliva Cruz, Segundo Manuel; Guerrero Abad, Juan Carlos
The National Institute for Agrarian Innovation (INIA) in Perú, among countless projects, maintains the Peruvian National Cucurbita spp. germplasm bank representing the remarkable Cucurbita spp. diversity in Perú. Prior to this project, the INIA Cucurbita collection covered much of the southern Perú Cucurbita spp. diversity but was lacking Cucurbita spp. samples from northern Perú. Therefore, the Fulbright Program funded this project to investigate and inventory the disappearing diversity of Cucurbita moschata and Cucurbita ficifolia in the Department of Amazonas, Perú. The collection focused on three landraces that belong to two different species (Table 1). The two C. moschata landraces are known in the Amazonas region as loche and cushé, whilst the C. ficifolia landrace is commonly known as chiclayo. Loche has a higher economic value and culinary influence, whilst cushé has a greater phenotypic diversity but is farmed on a smaller scale. All three, loche, cushé and chiclayo, show different physical, culinary, cultural, and geographic adaptations. The objectives of this project included:(a) collecting C. moschata and C. ficifolia samples from different districts in the Department of Amazonas, Perú for seed saving,(b) taking morphological data and photos of each collected sample for analysis, and (c) collecting cultural, historical, and culinary information.
Spatio-temporal evaluation of metals and metalloids in the water of high Andean livestock micro-watersheds, Amazonas, Peru
(Elsevier, 2024-06-14) Leiva Tafur, Damaris; Rascón Barrios, Jesús; Corroto de la Fuente, Fernando; Goñas Goñas, Malluri; Gamarra Torres, Oscar Andrés; Oliva Cruz, Segundo Manuel
Cattle ranching is a fundamental economic activity in northern Peru, where proper management of water resources is crucial. This study, a pioneer in the region, evaluated water quality and its suitability for human consumption, vegetable irrigation, and livestock production. It is also the first study to document the presence of metals and metalloids in vulnerable areas because they are located at the headwaters of river watersheds. The spatiotemporal evaluation of physicochemical parameters, metals, and metalloids was performed in five micro-watersheds (Cabildo, Timbambo, Pomacochas, Atuen, and Ventilla) from water samples collected in the dry season (October 2017) and wet season (March 2018). The parameters were analyzed using microwave plasma atomic emission spectrometry. The results were contrasted with international and Peruvian quality standards related to dairy cow production. The highest values of pH, total dissolved solids, and electrical conductivity were reported during the dry season, and the highest turbidity during the wet season. Of the metals evaluated, arsenic (As) was omnipresent in all the micro-watersheds, followed by lead (Pb). In contrast to World Health Organization regulations, concentrations of As, cadmium (Cd), Pb, and iron represent a risk; according to Peruvian regulations, As and Pb exceed the concentrations established for use in animal drinking water and vegetable irrigation, and according to water guidelines for dairy cattle, concentrations of As, Pb, Cd, and Al exceed the permitted limits. The high concentrations of these metals in the study area are attributable to a synergy between natural factors, such as Andean geology and livestock activity. The data reported will allow for proper water resource management, pollution prevention, and the design and adoption of mitigation measures.