A cana-de-açúcar é uma cultura com grande potencial econômico para o Brasil, sendo o país responsável por mais de 25% da produção mundial. A região de São Paulo é a maior produtora, ficando o Rio Grande do Sul responsável por menos de 5% do total produzido, isso porque a produtividade média do estado é baixa, devido ao uso de variedades antigas que geralmente apresentam baixo rendimento e pouca adaptação às condições ambientais. o objetivo deste trabalho foi avaliar os efeitos do uso de um mix de cinco espécies de bactérias diazotróficas nas características biométricas e conteúdo de clorofila de plantas de cana-de-açúcar. O trabalho foi desenvolvido na Embrapa Clima Temperado, sob ambiente protegido, tipo telado. O delineamento experimental utilizado foi o de blocos casualizados, com 6 repetições, onde cada parcela foi representada por três plantas de cana-de-açúcar. Os fatores foram arranjados em esquema bifatorial (5x2), ao testar cinco variedades de cana-de-açúcar e o uso de bactérias diazotróficas (com e sem uso de inoculante bacteriano), totalizando 10 tratamentos. Aos 120 dias foram realizadas as avaliações de número de folhas, número de gemas, altura de planta, diâmetro de colmo e índice de clorofila (SPAD). Pode-se concluir que o uso de bactérias diazotróficas no cultivo de cana-de-açúcar promove aumentos significativos em características importantes, como altura de planta, diâmetro de colmo e índice de clorofila. E através da fixação biológica de nitrogênio, pode melhorar o estado nutricional das plantas, levando ao uso de menor quantidade de fertilizantes nitrogenados, o que diminui os impactos ambientais da utilização desses insumos e torna o cultivo da cana-de-açúcar mais sustentável. Palavras-chave: Saccharum sp, inoculante bacteriano, fixação biológica de nitrogênio, crescimento vegetativo ABSTRACT Sugar cane is a crop with great economic potential for Brazil, being the country responsible for more than 25% of world production. The São Paulo region is the largest producer of the culture being Rio Grande do Sul responsible for less than 5% of the total produced. The state's average productivity is low due to the use of old varieties that generally have low yield and little adaptation to environmental conditions. This work aimed to evaluate the effects of using a mix of five species of diazotrophic bacteria on the biometric characteristics and chlorophyll content of sugarcane plants. The work was developed at Embrapa Temperate Climate, under protected environment, screened type. The experimental design used was randomized blocks with 6 replications, where each plot was represented by three sugar cane plants. The factors were arranged in a bifactorial scheme (5x2), by testing five sugarcane varieties and the use of diazotrophic bacteria (with and without the use of bacterial inoculant), totaling 10 treatments. At 120 days, leaf number, bud number, plant height, stem diameter and chlorophyll index (SPAD) were evaluated. It can be concluded that the use of diazotrophic bacteria in sugarcane cultivation p...

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The management of urban spaces and environmental health has been growing in recent years, and the sound aspects were highlighted during the Coronavirus pandemic (COVID-19). Locations that generally showed noises from vehicle traffic presented a diversity of sounds, generally not perceived in everyday situations before the pandemic. Awareness of the sound impacts generated before the pandemic has provided a broad discussion between the scientific community and managers regarding developing tools to improve urban planning and environmental health in cities. This study aims to characterise the soundscape of two parks in Curitiba by triangulating evaluation methodologies proposed in the ISO/TS 12913-2 (2018). Such triangulation included the descriptive analysis of objective and subjective sound data, analysis and elaboration of sound and perception maps, providing a systemic overview of the sonic environment of the investigated parks.

The present study aims to characterise the soundscape of two parks in Curitiba (Bacacheri Park and Botanical Garden), along with a relaxation phase of sanitary containment measures of the SARS-CoV-2 (COVID-19) pandemic, during the year 2021. The authors collected subjective data from 200 participants (100 in each park) about perceived sound sources, sound annoyance generated by specific sources, functionality and familiarity of the parks, demographic data, and motivation for using the parks. The equivalent sound pressure levels were monitored over 15 minutes at various spots inside parks. Subjective data were analysed using the IBM SPSS 27® statistical software, and a Two-step Cluster Analysis was adopted. The cluster analysis results satisfactorily demonstrated the soundscape characterisation of the investigated parks. Such results showed that users are not bothered by the sounds of the region in Bacacheri Park and are slightly or moderately bothered by traffic sounds in the Botanical Garden. It was possible to verify the profile of the parks' users. Most women aged 18-35 have higher education and live near the parks. At Bacacheri Park, users mentioned that one of the motivations for using the park was "a safe place to relax in times of a pandemic".