Strawberry culture is economically important because its fruits are widely consumed in natura, in unprocessed and processed forms, by a variety of industries. Currently the semi-hydroponic cultivation of this crop has been gaining space in relation to soil cultivation, which makes it important to identify, through studies, different systems, cultivation sites, as well as the use of different substrates. The objective of this study was to analyze the agronomic response of Camarosa strawberry cultivar in an out-of-soil system with the use of alternative substrates at different densities. The experiment was carried out in Pelotas-RS, in the locality of Monte Bonito (31°39'44''S, 52°27'29''W at 52.46 m altitude). The experimental design was completely randomized in a subdivided plots scheme, with three replications. In the main plots were allocated three substrates composed of carbonized rice hull, organic compost and tungue pie, and in the subplots, the planting densities of 9, 10, 12, 16 and 20 m-2 plants were allocated. The vegetative growth and the fruit production of the Camarosa cultivar were evaluated. It can be concluded that the addition of organic compound and tungue pie to the carbonized rice hull favors the development of the plants, the production and size of strawberry fruits in the semihydroponic system adopted. The density of 20 plants m-2 confers higher productivity for the cultivar Camarosa.
Sugarcane production in Brazil for the 2019/20 harvest is estimated at approximately 615 million tons. However, in the state of Rio Grande do Sul, it is estimated at only 42.5 thousand tons. It is assumed that the use of diazotrophic bacteria can contribute to the expansion of sugarcane cultivation in the state through increased productivity; hence, this study aimed to evaluate the effects of diazotrophs on the growth of sugarcane. The study was conducted using sugarcane varieties: RB867515, RB92579, RB966928, and RB975932 that were either treated with diazotrophic bacteria or left as a control. The application of diazotrophic bacteria resulted in increased leaf area and stem number in variety RB867515 (cane plant cultivation cycle), and an increase in the relative chlorophyll content of all the varieties of sugarcane except of RB92579. Furthermore, most varieties responded positively in terms of biomass, dry matter, total nitrogen, and soluble solids. These results suggest that the application of diazotrophs assists in the growth and development of sugarcane varieties in Rio Grande do Sul.
O crescimento urbano desordenado tem causado uma série de impactos ambientais e preocupações por parte da população e seus gestores. Assim, o desafio da sustentabilidade urbana passou a ocupar um papel de destaque dentre os eixos estratégicos nos órgãos ambientais do país. Buscando minimizar os impactos ambientais, sociais, econômicos e transformar o cenário ambiental atual, a Lei 12.305/10 que institui a Política Nacional de Resíduos Sólidos (PNRS), estabelece a obrigatoriedade de elaboração de Planos Municipais de Gerenciamento Integrado de Resíduos Sólidos (PMGIRS). A fim de adequar-se à legislação, o Município de Cotiporã/RS elaborou seu PMGIRS no ano de 2012, é a partir dele que realizamos um estudo técnico e bibliográfico, propiciando uma análise a fim de estabelecer um melhor andamento das metas e ações realizadas no cumprimento do Plano. Realizou-se pesquisa documental do PMGIRS e diagnóstico in loco da situação atual do manejo dos Resíduos Sólidos, após a implantação do Plano. É possível constatar que a administração pública vem empenhando esforços no cumprimento do plano, tanto do ponto de vista organizacional, planejamento e na condução das ações e metas nas etapas do manejo dos resíduos. As recomendações técnicas propostas poderão ser revistas na continuidade da implementação do PMGlRS e incorporadas às ações que já vem sendo realizadas, propiciando melhoria continua, atualização e adequação do Plano.
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