Universidade Federal Rural do Rio de Janeiro

About: Universidade Federal Rural do Rio de Janeiro is a education organization based out in Seropédica, Brazil. It is known for research contribution in the topics: Population & Species richness. The organization has 6405 authors who have published 9852 publications receiving 105911 citations.

Produção e distribuição de biomassa em Eucalyptus camaldulensis Dehn. em resposta à adubação e ao espaçamento

Abstract: Plantas de Eucalyptus camaldulensis sob quatro niveis de adubacao foram estabelecidas em quatro espacamentos, na regiao dos cerrados, em Minas Gerais, com o objetivo de avaliar a influencia destas variaveis na producao e no acumulo de biomassa nas plantas. Os espacamentos foram constituidos por uma distância fixa entre as linhas de 3 m e distância entre as plantas na linha de 2, 3, 4 e 5 m. A adubacao consistiu de niveis proporcionais crescentes de uma combinacao de fertilizantes denominados 0, 1, 2 e 4. A producao e a alocacao de biomassa foram avaliadas aos 20 e 32 meses de idade. Equacoes de regressao foram ajustadas, utilizando-se dados obtidos aos 32 meses de idade, para estimativa da producao de biomassa da parte aerea e da madeira. A producao media de biomassa da madeira, aos 32 meses, foi 71, 120 e 98% superior nos niveis de adubacao 1, 2 e 4, respectivamente, quando comparadas com plantas no nivel 0. A adubacao promoveu reducao na relacao raiz/parte aerea, tendo sido 0,87, 0,70, 0,67 e 0,59, para niveis crescentes de adubacao. A producao de biomassa da parte aerea e da madeira, por planta, aumentou com o espacamento entre as plantas, ou seja, maior producao foi obtida no espacamento mais amplo (3 x 5 m), sendo a producao por unidade de area maior nos menores espacamentos. A producao de biomassa apresentou comportamento quadratico, tendo as maiores producoes, por unidade de area e por planta, sido obtidas entre os niveis de adubacao 2,7 e 2,8.

Guideline of the Brazilian Society of Cardiology on Telemedicine in Cardiology - 2019

Abstract: Apresentacao Em boa hora, decidiu a Sociedade Brasileira de Cardiologia (SBC) fazer uma diretriz em telemedicina aplicada a cardiologia, tambem designada telecardiologia. A Organizacao Pan-americana de Saude (OPAS) e a Organizacao Mundial de Saude (OMS) definem Telemedicina como “a prestacao de servicos de saude remotos na promocao, prevencao, diagnostico, tratamento e reabilitacao pelos profissionais de saude que utilizam as tecnologias de informacao e comunicacao, que lhes permitem trocar dados, com o objetivo de facilitar o acesso e a oportunidade na [...]

Effect of sugarcane waste in the control of interrill erosion

Abstract: The cultivation of sugarcane uses different cropping systems that result in varying quantities of crop waste, this may influence soil erosion. The objective of this study was to evaluate the loss of soil and water, the infiltration rate, and soil surface roughness in an area cultivated with sugarcane (Saccharum spp.). Six treatments with different levels of plant waste were evaluated: sugarcane without plant waste; sugarcane with 4.0 Mg ha-1 of waste; sugarcane with 8.0 Mg ha-1 of waste; sugarcane with 12.0 Mg ha-1 of waste; sugarcane with 16.0 Mg ha-1 of waste; and burned sugarcane. The treatments were arranged in a randomized block design with four replications, totalling 24 experimental plots. As soil depth increased, there is reduction in macroporosity, total soil porosity, organic carbon content, mean geometric diameter and weighted mean diameter of the soil aggregates, whereas the bulk density of the soil displays the opposite trend. The presence of sugarcane waste on the soil surface increases the time required for the initiation of surface runoff. Sugarcane waste does not alter soil surface roughness, and at the minimum amount of waste administered (4 Mg ha-1) reduces losses of soil and water and increases the infiltration rate. The lack of soil surface coverage after harvesting the sugarcane contributes to soil and water loss, and reduces the rate of stable infiltration of water into the soil.

Urban climate and clues of heat island events in the metropolitan area of Rio de Janeiro

Abstract: This paper aims to map the thermal field in the metropolitan region of Rio de Janeiro (MARJ) considering the atmospheric characteristics and the land use that contribute to understanding the urban heat island. Three thermal maps are defined through the use of Landsat5-TM satellite images for three winter events chosen for the decades of 1980, 1990, and 2000, respectively. The results reveal a concentration of warmer cores in urban central areas as well as some local warmer areas in suburban region. Sites with lower temperatures correspond to vegetated areas which are away from the central part of the MARJ, including points of suburban areas. This work emphasizes the importance of the combined analysis of surface temperature with land use and atmospheric conditions, depicting a distinct pattern of heat islands for tropical climate.