12 páginas

En la Estación Experimental del Instituto Veterinario de Investigaciones Tropicales y de Altura (IVITA), clasificado como Bosque Tropical semi siempre verde estacional, situado en la Región de Ucayali a 60 km de la ciudad de Pucallpa, se evaluó el establecimiento de pastos mejorados en mezcla (gramíneas/leguminosas) asociado con arroz y caupí como cultivos financiadores. Se utilizó un diseño de Bloques Completos al Azar con tres repeticiones y cinco tratamientos que correspondieron a: 1) mezcla de pastos; 2) arroz solo; 3) caupí solo; 4) pasto + arroz; 5) pasto + caupí. Las parcelas fueron de 168 m2. Se determinó: número de plantas/m2, porcentaje de cobertura, materia seca kg/ha y rendimiento de los cultivos (4, 8, 12, 16 y 20 semanas después de la siembra). Los resultados mostraron que no hubo influencia de la asociación en el número de plantas de la pastura y los cultivos...

The consequences of climate change influence the distribution of species, which plays a key role in ecosystems. In this work, the modeling of the current and potential future distribution was carried out under different climate change scenarios of a tree species of high economic and commercial value, Dipteryx spp. This is a hardwood species that plays an important role in carbon sequestration, providing food and nesting for wildlife species, reaching more than 40 m in height with an average diameter of 70 to 150 cm. This species is currently threatened by overexploitation. Thirty-six bioclimatic, topographic and edaphic variables with ~1 km2 spatial resolution obtained from the WorldClim, SoilGrids and SRTM databases where used. Highly correlated variables were identified with the MaxEnt software for forecasting how the species distribution will be affected until the year 2100, according...

Findings from a survey on sources of income and land allocation outcomes of 578 households from 26 communities with diverse ethnic composition at distinct environmental settings in Ucayali (Peruvian Amazon) are used to contrast livelihood strategies featuring high forest and high agriculture dependency, examining whether agricultural intensification can be linked to lower deforestation. A typology of households based on their land use allocation profile was used to assess current and cumulative cleared land. Recently cleared areas by households oriented to perennials, semi-perennials and pastures were similar to those focusing on annual crops. Multiple class comparisons provided evidence that land use intensification is not associated to land sparing. Near 40% of the households’ annual income was derived from forests, followed by agriculture (25%), wages (17%) and livestock (11%). Inco...