Los componentes del pastoreo afectan de forma diferencial las micorrizas en Paspalum dilatatum Poir.

García, Silvina; Pezzani, Fabiana; Lezama, Felipe; Paruelo, José M.

doi:10.25260/ea.19.29.2.0.802

Cited by 5 publications

(4 citation statements)

References 50 publications

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“…Similar results were reported by Garcia, Pezzani, Lezama, and Paruelo [23], and Bravo, Garcia, Contreras, Pena, Alcala, and de Ortega [32] in E. polystachya and P. dilatatum, with values of 12% PB and 38% CP. Meanwhile, Aumont, Caudron, Saminadin, and Xande [20], in S. splendida under conditions of the Ecuadorian Amazon, found 11, 77, 35, 39 and 43% of CP, NDF, ADF, Hcel and DMD; respectively.…”

Section: Resultssupporting

confidence: 89%

“…The first component shows that these indicators explain the greatest variability (62.77) and showed NDF, ADF, Cel, Hcel, ratios of neutral detergent fiber/nitrogen (NDF/N) and acid detergent fiber/nitrogen (ADF/N) as those of greater effect on the quality of grasses. This may be due to the type of growth that these species present and to the decrease in the crude protein content and the increase in the cell wall with the maturity of the plant [23]; aspects that were demonstrated in the current investigation, although in the case of grass species the fibrous content is more marked than in other forage species. In component two, calcium was characterized, and the leaf/ stem ratio showed influence in this component and in the third component the day matter yield and biomass.…”

Section: Resultsmentioning

confidence: 52%

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Potencialidades de los pastos en los sistemas de producción de la agricultura familiar en la provincia de Los Ríos, Ecuador, en el verano

Torres-Navarrete,

Sánchez-Laiño,

Verdecia-Acosta

et al. 2023

Enfoque UTE

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El objetivo de este estudio es determinar las potencialidades de los pastos más utilizados en los sistemas de producción familiar en la provincia de Los Ríos, Ecuador, durante el verano. El estudio se realizó en áreas de investigación y en el Laboratorio de Ruminología y Metabolismo Nutricional de la Universidad Técnica Estatal de Quevedo. Las especies más utilizadas en los sistemas ganaderos fueron seleccionadas para realizar estudios de comportamiento productivo (biomasa total, RMS total, hojas y tallos) calidad (MS, PB, cenizas, MO, P, Ca, FDN, FDA, LAD, Cel, Hcel, CC, TT, FT, TCT, DIVMS, DISMS, DMO, EM y ENL), a las que se les realizaron análisis de conglomerados para agrupar especies con similitud. Para la producción y composición química se obtuvieron tres componentes principales con valores propios superiores a uno y que explican 87.27 % de la variabilidad entre las variedades. En el componente uno se mostraron 11 indicadores relacionados con proteína, energía y los componentes estructurales de la célula con valores de preponderancia mayor de 0.75. Para el análisis de conglomerados se formaron cinco grupos, con los mejores resultados para el tercer grupo, lo integró el M. maximus con valores altos en la PB, relación hoja/tallo, DISMS y EM. Toda esta información contribuiría al diseño de alternativas tecnológicas para siembra, establecimiento, manejo y uso de su biomasa como fuente de alimento donde se minimiza la productividad y la sostenibilidad del ecosistema.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 52%

Potencialidades de los pastos en los sistemas de producción de la agricultura familiar en la provincia de Los Ríos, Ecuador, en el verano

Torres-Navarrete,

Sánchez-Laiño,

Verdecia-Acosta

et al. 2023

Enfoque UTE

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“…The grasslands of the North region may be favored by the practice of grazing and seasonal agriculture. These activities are considered less harmful to the maintenance of diversity (García et al 2019;Gonçalves 2016;Dostálek & Frantik 2008). The "Quebradas forests" stand out for their peculiar characteristic of forming different microclimates between the top and bottom of ravines (Rivas 2010).…”

Section: Resultsmentioning

confidence: 99%

Spiranthinae (Orchidaceae - Cranichideae) from Uruguay: taxonomy and distribution

et al. 2022

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Uruguay occupies an area of special relevance for species of terrestrial orchids of the subtribe Spiranthinae because it is located in one of the largest continuous grassland regions of the Americas. The aim of this study is to provide a taxonomic study of Spiranthinae species from Uruguay. A total of 22 species distributed in seven genera were confirmed to the country, representing almost half of the species of terrestrial orchids in Uruguay. Cyclopogon (8 spp.), Skeptrostachys (5 spp.) and Brachystele (4 spp.) were the most representative. Additionally, a new synonym in Brachystele dilatata (=Brachystele waldemarii) is proposed. The group was found in all departments and ecoregions of the country, mainly in the southeastern (Maldonado: 10 spp., Rocha: 12 spp. Lavalleja: 10 spp.) and northeastern (Rivera: 11 spp., Tacuarembó 9 spp.) regions. Among the ecoregions, the "Serrano Forest" (17 spp.) and "Graben de la Laguna Merín" (14 spp.) were the most species-rich. Descriptions, illustrations, an identification key, and comments on geographical distribution of the species are provided.

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“…Therefore, knowledge about chemical engineer communities and their variation with environmental factors is crucial for sustainable functioning of natural and managed ecosystems. Some studies have reported grazing impact on chemical engineers in different regions of Argentina, based on soil microbial community characterisation (e.g., plate counts and molecular methods), microbial activity (e.g., soil respiration, enzyme activity) and/or mycorrhizal colonisation rate (e.g., Abril & Bucher, 1999; García, Pezzani, Lezama, & Paruelo, 2019; Grigera & Oesterheld, 2004; Menoyo, Renison, & Becerra, 2009; Olivera, Prieto, Bertiller, & Ferrero, 2016; Prieto, Bertiller, Carrera, & Olivera, 2011). However, soil microbial biodiversity is seldom considered as a significant component of livestock systems in the region.…”

Section: Introductionmentioning

confidence: 99%

Assessing soil microbial biodiversity as affected by grazing and woody vegetation cover in a temperate savannah

Mujtar

Gregorutti

Eclesia

et al. 2021

Annals of Applied Biology

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Although it is well established that land use and management affects soil microbial biodiversity, with consequences for soil‐mediated ecosystem services, knowledge on human‐induced variability in soil bacterial and fungal communities is more abundant for cropping than for livestock systems. In particular, grazing management affects vegetation cover and light availability to lower vegetation layers, particularly in wooded grazing ecosystems. Our objective was to evaluate the use of T‐RFLP analysis to characterise soil microbial community patterns. We worked in a grazed temperate savannah in Entre Ríos (Argentina) and focused on two farms with different grazing management, resulting in different vegetation cover. At each farm, we sampled soils from four conditions forming a two shrub cover conditions (open and close) by two light availability conditions (high and low) factorial set with three replicates. T‐RFLP data for bacteria and fungi were used to characterise biodiversity patterns (diversity indexes, relative abundance of operational taxonomic units and community structure). Analyses were performed, between and within farms, using nonmetric multidimensional scaling analysis, non‐parametric multivariate analysis of variance and network analysis. Variation patterns of soil microbial communities were detected using T‐RFLP analysis in savannah soils from these two livestock farms. Farm, light and shrub conditions were statistically significant factors shaping variation patterns. For bacterial communities, light availability and shrub cover affected biodiversity and community structure respectively, but this impact was detected only for the farm with lower grazing intensity. For fungal communities, light availability was the factor shaping community structure, also with slightly higher impact on the farm with lower grazing intensity. These results suggest that in temperate woodlands lower grazing intensity, associated with higher vegetation cover, increases bacterial biodiversity while it decreases fungal community structure. Soil bacterial and fungal communities, showed contrasting patterns, and appear as sensitive indicators to monitor grazing management effects. We showed that T‐RFLP analysis is a cost‐effective methodology (compared to Illumina sequencing) that would be useful to disentangle impact of grazing intensity and vegetation cover in grazed temperate savannah.

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Los componentes del pastoreo afectan de forma diferencial las micorrizas en Paspalum dilatatum Poir.

Cited by 5 publications

References 50 publications

Potencialidades de los pastos en los sistemas de producción de la agricultura familiar en la provincia de Los Ríos, Ecuador, en el verano

Potencialidades de los pastos en los sistemas de producción de la agricultura familiar en la provincia de Los Ríos, Ecuador, en el verano

Spiranthinae (Orchidaceae - Cranichideae) from Uruguay: taxonomy and distribution

Assessing soil microbial biodiversity as affected by grazing and woody vegetation cover in a temperate savannah

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