Genesio Mario da Rosa

Dissimilaridade genética e análise de trilha de cultivares de soja avaliada por meio de descritores quantitativos

Alem das avaliacoes entre genotipos, a utilizacao de tecnicas multivariadas possibilita restringirem-se os erros, principalmente quanto a diversidade genetica, podendo-se, assim, prever combinacoes com maior efeito heterotico, alem da maior possibilidade de recuperacao dos genotipos superiores. Objetivou-se, com este trabalho, avaliar a divergencia genetica entre 18 cultivares de soja, por meio de seis caracteres morfoagronomicos. Foi realizada a analise de trilha, para averiguar as contribuicoes direta e indireta desses caracteres sobre o rendimento de graos. A distância generalizada de Mahalanobis fundamentou as tecnicas de agrupamentos, tanto a de Tocher, bem como a do dendrograma por ligacao simples. Observaram-se cinco grupos divergentes, sendo nove genotipos considerados similares entre si, enquanto os cultivares CEP 59, Netuno e Urano foram formadores de grupos isolados pelos dois metodos de agrupamento. Quanto a analise de trilha, observou-se que os caracteres indiretos pouco influenciaram o rendimento de graos, tendo relacao direta significativa com massa de 100 graos, tendo-se destacado os cultivares Tertulha e CEP 53, com produtividade de graos acima de 3,7 t ha-π. Palavras-chave: agrupamento, Glycine max (L.) Merr., divergencia genetica.

Caracterização dos níveis de elementos químicos em solo, submetido a diferentes sistemas de uso e manejo, utilizando espectrometria de fluorescência de raios-x por energia dispersiva (EDXRF)

This study aimed to evaluate the chemical elements levels in soil, submitted to different management systems and use by the Energy Dispersive X-Ray Fluorescence Spectrometry - EDXRF. The systems were T1 - agro forestry (SAF), T2 - Native Field (CN), T3 - Native Forest (NM), T4 - Tillage Forest (PF); T5 - conventional tillage system (SPC) and T6 - System tillage (NT). Samples were collected at 0-10 and 10-20 cm, dried and ground for analysis in EDX-720. The soil showed no difference in the average concentrations of chemical elements analyzed in the profiles, but the systems presented different concentrations of metal elements, and T3 had the highest K, Ca and Zn at 0-10 cm and higher contents of K, Ca, Cu, Zn and Mn in the layer of 10-20 cm.

Interiorização do ensino superior público: evolução histórica da educação em Frederico Westphalen/RS

This paper introduces the process of evolution of education in Frederico Westphalen, RS, Brazil, through a historical perspective context, based on social, cultural, political, and economical actions in this town. To do so, contextual field research that was used includes both the public education system, that is, federal, state, and municipal, and the private one, ranging from elementary, general and technical secondary, and undergraduate degrees. In economical terms of data available, the investment given since then, and specially these last two years, which has implemented a new public unity of higher teaching, it is expected huge impacts for social arcs in a whole. It is supported by that point of view which highlights all educational investment generates development for a society, turning it into a fair, conscious, dignified, and solidary one for living. Frederico Westphalen case here remarks the metaphor of the barrel changing its water into the water of wisdom. Key-words: education; public politics for education; historical evolution.

QUALIDADE FISIOLOGICA E SANITARIA DE SEMENTES SALVAS DE FEIJAO PRODUZIDAS NO MEDIO ALTO URUGUAI, RS, BRASIL

Physiological and sanitary quality of saved seeds of beans produced at Médio Alto Uruguai, RS, Brazil. Common bean is grown in Brazil by different production systems, from small to large properties with great social and economic importance. Thus, the objective of this study was to evaluate the physiological quality of bean seeds of cultivars used by farmers in the region of Médio Alto Uruguai. The experimental design was a completely randomized design with four replicates, evaluating 21 seed lots. The bean seeds used by farmers in the municipalities of the region of Médio Alto Uruguai presented high germination and vigor, being within the standards for seed commercialization. There was no influence of the collection sites on the physiological quality of the seeds. However, the lots presented a high incidence of storage fungi, which causes deterioration and loss of the physiological quality of the seeds.

Chemical Characterization of Organic Residues in Agroindustrial and Urban Waste using Energy Dispersive X-ray Fluorescence Spectrometry

Treated and reused industrial residues and urban waste are depicted as potential alternative sources for agricultural use. In this context, the objective of this study was to determine the chemical element concentrations in organic residues from the Medium-High Uruguay Region of the Rio Grande do Sul, using energy dispersive x-ray fluorescence spectrometry (EDXRF). The organic compounds analyzed were meat agroindustry sludge, organic composites from agribusiness meat, and organic compounds from urban waste (particle sizes: >4.75 mm, <4.75 mm to >2.00 mm, and <2.00 mm). The results showed that chemical elements found in greater concentrations were calcium, silicon, iron, aluminum, phosphorus, sulphur, and potassium. Thus, the EDXRF technique proves to be efficient for characterizing organic compounds and that these residues are appropriate as alternative sources of organic fertilizer that can be applied in an efficient and safe manner in agricultural systems.

CARACTERÍSTICAS DA TAXA DE INFILTRAÇÃO E DENSIDADE DO SOLO EM DISTINTOS TIPOS DE COBERTURA DE SOLO EM ZONA URBANA

The aim of this study was to indicate the land use types in Frederico Westphalen (RS) that are more favorable to storm water infiltration, looking forward reducing runoff in the city. To achieve the objective it was perform 45 infiltration tests and soil density in different soil covers. The city was divided in lots, and those were classified according to the following land uses: Mixed Trees (FT), Citrus (C), Grass (G), Crop Rotation (CR) and Bare Soil (SE). The infiltration tests were carried out with the infiltrometer ring method and also there were conducted 45 density tests in a lab. Bare Soils showed the lowest infiltration rate (8.05 mm/h) and the higher soil density (1.58 g/cm3). Soils without green management (SE) do not contribute significantly to rainwater infiltration. FT soils, with less human intervention, showed higher average rates of infiltration (370.3 mm/h) and less than 1.2 g/cm3 of density. Among the remaining land use, airy soils (RC and C) showed better response to infiltration (between 228.5 and 274.0 mm/h). Although the grass is considered a green area, the results indicated that the existence of these areas, by itself, it’s not the better strategy for water infiltration in urban areas.