Examinando por Autor "Aguirre, Lucrecia"

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Comparative Analysis of Morphology, Resource Allocation, and Nutritional Characteristics in Populations of Festuca dolichophylla Cultivated in the Andean Region of Peru
(MDPI, 2026-02-03) Paucar, Ysai; Paucar, Samuel Porfirio; Mejía, Flor Lidomira; Vásquez, Héctor Vladimir; Zagaceta, Luis Homero; Saucedo Uriarte, José Américo; Yoplac, Ives; Flores, Enrique Ricardo; Contreras, José Luis; Argote Quispe, Gregorio Fructuoso; Yalli Huamaní, Teodoro Bill; Aguirre, Lucrecia
Grasslands are ecosystems of global importance; in Peru, they represent more than half of the country's territory. However, few studies have been conducted on high Andean grasslands. The objective was to study morphological, productive, resource allocation, and nutritional characteristics in five populations of Festuca dolichophylla grown under similar conditions. Populations that originated from Huancavelica Community and University, Junín, Pasco, and Puno were grown in Huancavelica Community in a randomized block design. After twelve months, a uniformization cut was performed, and five months later they were evaluated. Morphological characteristics, productivity, and resource allocation were analyzed with ANCOVA, the nutritional characteristics were analyzed with one-way ANOVA (considering population as a factor). Significant differences (p < 0.05) were found for morphological characteristics such as height, number and length of stems, and number of inflorescences. The resource allocation was 13.8% root, 18.4% crown, 29.2% culms + sheaths, 34.8% blades, and 3.8% inflorescence, with no differences between populations (p > 0.05). The Puno population stood out for its greater biomass, linked to more stems and inflorescences. Nutritional characteristics varied among populations in terms of crude fiber, neutral detergent fiber, acid detergent fiber, and in vitro dry matter digestibility. These findings are useful for selecting populations in revegetation or genetic breeding programs.
Endozoochory by Goats and White-Tailed Deer: Type of Ruminant Affect Recovery and Germination of Neltuma pallida Seeds
(Preprints.org / MDPI, 2025-11-25) Salinas Marcos, Jorge; Cruz Luis, Juancarlos Alejandro; Aguirre, Lucrecia
The "algarrobo", Neltuma pallida is a key tree species in the seasonally dry tropical forests in Equatorial Pacific South America, currently at risk. Its regeneration depends on endozoochorous seed dispersal, in which seeds are ingested and later defecated by animals, helping to release and scarify them. This study compared the role of the native white-tailed deer (Odocoileus virginianus) and the introduced goat (Capra hircus) in seed dispersal. Seeds were recovered from the dung of both species after experimental feeding and from free-ranging goats grazing in fruiting N. pallida forests. Seed recovery was higher in deer dung (9.4%) than in goat dung (3.1%). Retention time was also shorter in deer (peak at 48 hours) than in goats (peak at 84 hours). Only deer scarification significantly improved germination percentage (Tukey test, p < 0.001) and germination speed (T25 = 8.98 days). Goats reduced germination speed under experimental conditions (T25 = 19.25 days), but slightly improved it under forest conditions (T25 = 12.81 days). These differences are attributed to the morphophysiological traits of each species. Although goats did not enhance overall germination, they maintained it at ~44% and contributed to seed dispersal and dormancy release.
Frecuencia de Trifolium amabile Kunth (Fabaceae) en dos sitios del Altiplano de Puno, Perú
(Universidad Nacional Agraria La Molina, 2013-08-16) Argote Quispe, Gregorio; Aguirre, Lucrecia; Flores, Enrique
Se estudió la frecuencia de T. amabile y su grado de asociación con otras especies vegetales en dos sitios de pastizal dominados por gramíneas altas, IIpa 3820 msnm y Quimsachata 4300 msnn, así como el grado de correlación entre la presencia de esta especie con variables físico-químicas del suelo. T. amabile estuvo presente en la mayoría de las comunidades vegetales estudiadas pero en porcentajes relativamente bajos, rangos de 1.0 a 8.3 %, y asociada positivamente (p< 0.05) con Alchemilla pinnata, Azorella diapensoides, Calamagrostis amoena, Festuca dolichophylla y Muhlenbergia fastigiata, en condiciones de suelos profundos, bien drenados y con un adecuado contenido de fósforo y nitrógeno; lo cual, estaría sugiriendo que estos elementos químicos podrían estar limitando su mayor frecuencia y distribución en el altiplano. Se recomienda realizar estudios para dilucidar el rol de esta leguminosa en el aporte de nitrógeno al suelo y la calidad de la dieta de animales al pastoreo, teniendo en cuenta que el contenido de proteína de la mayoría de las gramíneas nativas, durante gran parte del año se mantiene muy por debajo de niveles recomendables para una buena nutrición del ganado.