; RESUMOA conservação ambiental e o desenvolvimento sustentável por parte da construção civil têm motivado a população para a adoção de novas práticas, sobretudo, as que visam à redução dos impactos ambientais. Com o aumento do crescimento urbano, as áreas verdes estão se tornando mais escassas no cenário constituinte de muitas cidades e a conscientização da sociedade para o uso racional da água, sua conservação e reúso tem se tornado cada vez mais importante. A utilização de telhados verdes pode ser vista como uma das principais técnicas para mitigar a situação problema, pois aumenta a quantidade de áreas verdes favorecendo aspectos ecológicos e, principalmente, o aproveitamento de água da chuva. Isto se dá porque neste tipo de cobertura, grande parte da água precipitada infiltra e pode ser captada, o que torna possível a sua utilização. A presente pesquisa foi realizada em uma instituição de ensino superior do norte do Rio Grande do Sul com o intuito de avaliar qualitativamente a água da chuva captada em protótipos de telhados verdes e compará-la com a água captada em outro recipiente, considerando parâmetros físicos e químicos para usos não potáveis. Através da análise das amostras coletadas, pôde-se perceber que os resultados não apresentaram uma correlação entre si, contrapondo as expectativas iniciais do projeto e levando à conclusão de que as águas pluviais captadas pelos telhados verdes devem passar, primeiramente, por um tratamento adequado antes de ser utilizada para fins não potáveis. Palavras-chave: telhados verdes. Aproveitamento de água pluvial. Sustentabilidade hídrica. ABSTRACTEnvironmental conservation and sustainable development by civil construction have driven the population to adopt new practices, especially those aimed at reducing environmental impact. With increasing urban growth, the green areas are becoming scarcer in the scene of many cities and society awareness for the rational use of water, conservation and reuse are becoming increasingly important. The use of green roofs can be seen as one of the main techniques to mitigate the problem situation as it increases the amount of green areas favoring ecological aspects and, especially, the use of rainwater. The reason is that in this type of covering, a large part of the rain water seepages and can be reserved, which makes its use possible. This survey was conducted in a northern higher education institution of Rio Grande do Sul in order to qualitatively assess the rainwater captured in green roofs prototypes and compare it with the water collected in another container, considering physical and chemical parameters for non-potable uses. Through the analysis of the samples collected, it could be seen that the results did not show a correlation with each other, comparing the initial expectations of the project and leading to the conclusion that the rainwater collected by the green roofs must pass, first, by an appropriate treatment before the use for no potable purposes.

Nitrogen supplementation becomes necessary when trying to increase yields of off-season corn crop grown in rotation with early-maturing soybean crop. Biological nitrogen fixation helps reduce the use of nitrogen fertilizers through the inoculation of nitrogen-fixing associative bacteria, such as those of the genus Azospirillum. This study aimed to evaluate the agronomic performance of corn hybrid DKB390Y in response to different application methods as the inoculant and doses of inoculant with Azospirillum brasiliense. The experiment was conducted in a property adjacent to Federal University of Mato Grosso (Sinop campus), between February and July 2018. The experimental design included randomized blocks in a 3×5 factorial arrangement, replicated four times, thereby totaling 60 plots (with three application methods: foliar spraying, spraying foliar with bovine gelatin, and with a paint roller [Black Decker Rapid Roller BDPR400-wool] and five doses of inoculant: 0, 100, 200, 400 and 800 mL ha-1). No differences in chlorophyll content at the bottom of the plant, plant height, and leaf area index were observed when varying the application methods. However, leaf nitrogen level, dry mass and grain yield changed when the application method used for inoculation changed. When evaluating doses, the control was found to be superior to the other treatments based on chlorophyll content at the bottom of the plant, plant height,leaf area, leaf nitrogen, and dry mass values. Grain yield was found to be superior with foliar inoculation at 100 mL ha-1 method foliar spray and 200 mL ha-1 methods foliar application with bovine gelatin.

No abstract

In order to achieve high yields for off-season corn crop sown after soybean harvest, high doses of nitrogen fertilizers are required. Biological nitrogen fixation helps reduce the use of nitrogen fertilizers through the inoculation of nitrogen-fixing associative bacteria, such as those of the genus Azospirillum. This study aimed to evaluate the agronomic performance of corn hybrid DKB390Y in response to different application methods, such as using inoculant and doses of inoculant with Azospirillum brasilense. The experiment was conducted in a property adjacent to Federal University of Mato Grosso (Sinop campus), between February and July 2018. The experimental design included randomized blocks in a 3×5 factorial arrangement, replicated four times (with three application methods: foliar spraying; spraying foliar with bovine gelatin; and with a paint roller (Black & DeckerRapid Roller BDPR400-wool®) and five doses of inoculant: 0, 100, 200, 400 and 800 mL ha-1). No significant differences were obtained through the application methods in the rates of chlorophyll, plant height, stem diameter, number of rows of grains, number of grains per row, ear length, ear diameter and weight of one thousand grains, except for grain yield. Grain yield was found to be superior with foliar inoculation at 100 mL ha-1 method foliar spray, and 200 mL ha-1 at method foliar application with bovine gelatin.