13 research outputs found
Integrated Environmental Assessment of streams in the Sinos River basin in the state of Rio Grande do Sul, Brazil
First record of a bloom of the invasive species Ceratium furcoides (Levander) Langhans 1925 in Rio Grande do Sul state, Brazil
Desempenho da mistura de aveia preta e azevém em função da adubação orgùnica e mineral
Integração de imagens NOAA/AVHRR: rede de cooperação para monitoramento nacional da safra de soja
First record of a bloom of the invasive species Ceratium furcoides (Levander) Langhans 1925 in Rio Grande do Sul state, Brazil
First record of a bloom of the invasive species Ceratium furcoides (Levander) Langhans 1925 in Rio Grande do Sul state, Brazil
Distribution of Tetranychus evansi and its predator Phytoseiulus longipes (Acari: Tetranychidae, Phytoseiidae) in southern Brazil
Uso de rejeito da dessalinização na solução nutritiva da alface, cultivada em fibra de coco
Genotoxicity on Tradescantia pallida var. purpurea plants exposed to urban and rural environments in the metropolitan area of Porto Alegre, southern Brazil
The Trad-MCN bioassay was used to investigate the genotoxicity on Tradescantia pallida var. purpurea plants exposed to variations in the environmental conditions in urban and rural sites in the metropolitan area of Porto Alegre, southern Brazil, over a one-year period. In spring 2009 and in summer, autumn and winter 2010, potted plants of T. pallida var. purpurea were exposed at two sites with different characteristics: the urban area of the municipality of EstĂąncia Velha, with leather and footwear industrial activity, and a Site of Special Environmental Interest in the rural area of the municipality of Novo Hamburgo. Other plants comprised the control group and were kept indoors. Frequencies of micronuclei (MCN) were determined in early tetrads of pollen mother cells and expressed as MCN/100 tetrads. Climate data were also registered during the experiment. MCN frequencies in the urban area were significantly higher (up to 8.13) than those found in the rural area (up to 1.26) and in the control group (up to 1.10), which did not differ statistically from each other over the year. The higher MCN frequencies observed in the urban site can be attributed to air pollution, but also may have been influenced by microclimatic and daily thermal variation differences between sites. Higher temperatures recorded in spring and summer may have influenced MCN frequencies observed in the urban site. No clear relation was observed between rainfall and MCN frequencies. Similar and high relative humidity percentages were registered over the period of the study. Considering that the bioindicator plant presents an integrated response to abiotic factors such as pollutants and weather conditions, it can be used as an additional tool that can point to synergistic effects of environmental variables on organisms
Produtividade e teor de sĂłlidos solĂșveis de frutos de cultivares de morangueiro em ambiente protegido Yield and soluble solids contents of fruits of strawberry cultivars in protected cultivation
O cultivo protegido Ă© uma alternativa para controlar variaçÔes climĂĄticas em diferentes locais e Ă©pocas de plantio, entretanto, seus efeitos e interaçÔes com a cultura do morangueiro ainda sĂŁo pouco conhecidos. O objetivo desse trabalho foi avaliar a influĂȘncia de trĂȘs sistemas de cultivo (tĂșnel alto, tĂșnel baixo e a campo) na produtividade, massa mĂ©dia de frutos e no teor de sĂłlidos solĂșveis dos frutos das cultivares de morango Dover, Camarosa, Sweet Charlie e Oso Grande em Guarapuava-PR. Quanto Ă produtividade e massa mĂ©dia de frutos, a cultivar Camarosa foi a melhor nos cultivos em tĂșnel, tanto alto quanto baixo, pelo seu excelente desempenho. Os frutos da cultivar Sweet Charlie apresentaram o maior teor de sĂłlidos solĂșveis nos trĂȘs ambientes de cultivo. A produtividade e a massa mĂ©dia dos frutos foram significativamente superiores nos cultivos em tĂșneis, alto e baixo, quando comparados ao cultivo a campo. O ambiente que propiciou maior acĂșmulo de sĂłlidos solĂșveis nos frutos foi o tĂșnel alto, diferindo significativamente dos demais ambientes de cultivo.<br>Protected cultivation is an alternative to control the climatic effects in different places and times of planting, however, its effects and interactions with the strawberry crop are little known. The goal of this study was to evaluate the effects of three cropping systems (high tunnel, low tunnel and field) on yield, mean fruit mass and the soluble solids contents of strawberry cultivars Dover, Camarosa, Sweet Charlie and Oso Grande in Guarapuava. Camarosa cultivar presents an excellent performance regarding yield and mean fruit mass in high and low tunnel cultivation; hence, these cropping system can be indicated. Fruits of Sweet Charlie cultivar had the highest content of soluble solids in all the cultivation environments. Yield and mean fruit mass obtained from high and low tunnels were significantly higher than in the field. The environment high tunnel allowed greater accumulation of soluble solids, differing significantly from other evaluated environments