959 resultados para Cana-de-açúcar - Qualidade
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Agronomia (Ciência do Solo) - FCAV
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The sugarcane is a crop of annual cycle, where its large water demand is not always full, causing stand gaps in the sprouting of ratoons. Thus, this study aimed to assess the stand gaps in the first and second ratoon sugarcane under seven levels of water deficit. The experiment was conducted in the Center of Agricultural Sciences of the Federal University of Alagoas in the period of 22 February 2010 to 20 February 2012. The stand gaps depending on water depths ranged from 11.2 (25% ETo) to 16.8% (100% ETo) in the first ratoon and from 24.8 (0% ETo) to 32.8% (100% ETo) on second ratoon. The average size of stand gaps ranged from 0.60 to 0.68 m in the first ratoon and from 0.70 to 0.74 m on second ratoon. The average distance to find a stand gap ranged from 16.8 to 29.5 m in the first ratoon and from 6.5 to 10.9 m in the second ratoon. The percentage of gaps and the average size of the gaps in the sprouting of ratoon increase with the age of the sugarcane plantation and the average distance between gaps decreases. The use of irrigation in the culture of sugarcane increase the percentage of gaps, but because these spaces are filled with culms of other sugarcane clumps and were irrigated with larger water depths, the agricultural productivity of the culture increases. The depths of irrigation decreases the average distance between gaps with more intensity in the first than in the second ratoon.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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The biomass resulting from processing sugarcane bagasse has been considered a source of cellulose with the potential production of bio-fuels. This lignocellulose can be processed into ethanol since is hydrolyzed by chemical processes (acids) or biotechnology (enzymes) which generate sugars suit for fermentation. This study had the objective to utilize physical and chemical pre-treatment processes for prehydrolysis of sugarcane bagasse. The experimental treatment was adjusted at a factor of 4 X 2, by the combination of pre-hydrolysis timing (15, 30, 45 and 60 minutes) and sulfuric acid concentrations (7.0% and 9.0%) which was incubated at a temperature of 121° C in an autoclave. The treatment data was subjected to analysis of the variance and averages which were compared using the Tukey test with a probability of 5%. The results obtained showed that through pretreatment acid applied on the lignocellulose material, there was a significant break from the substrate fibers like cellulose, hemicellulose and lignin.
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Este trabalho visa expor a análise de dados entre a produção de cana-de-açúcar e carne bovina, em especial na região de Tupã no estado de São Paulo. Consoante há de se observar que discrepâncias ocorrem em relação à produção de cana-de-açúcar e a carne bovina, demonstrado por intermédio dos gráficos obtidos nessa análise. O estado de São Paulo concentra em torno de 6 à 7% do total de rebanhos bovinos no Brasil, onde em contrapartida o estado de São Paulo é o maior produtor de cana-de-açúcar concentrando em torno de 57,6% da produção no Brasil. Tendo em vista isso, foram coletados dados do IEA-SP, e posteriormente foi feita a correlação de ambos que reforçou essa discrepância tanto na região de Tupã-SP como no estado de São Paulo o que implica no aumento de preços na carne bovina vendidas em varejos e supermercados, bem como a preocupação com os efeitos advindos da produção canavieira.
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Conforme relatório anual da Companhia Nacional de Abastecimento - Conab de (2012), a lavoura da cana-de-açúcar continua em expansão no Brasil e o Estado de São Paulo corresponde a 52% da produção nacional. O objetivo deste trabalho foi estudar a expansão canavieira nos EDRs de Botucatu, Jaú e Avaré frente ao “Protocolo Agroambiental” e os modelos de qualificação profissional ofertados. A metodologia utilizada constituiu-se em revisão bibliográfica. A hipótese é de que as políticas dirigidas ao setor “canavieiro” para requalificação dos cortadores não atendem de forma concreta as necessidades dos trabalhadores. Os resultados encontrados permitem concluir ausência de políticas integradas para qualificar e recolocar esses trabalhadores, não assegurando, portanto, a recolocação daqueles que foram dispensados.
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The sugarcane industry has been important in the Brazilian economy since the colonial period. The search for alternative energy sources has gained more prominence, by offering a product generating clean energy. With the opening of the Brazilian economy, the sector has undergone transformations operating in a free market environment requiring greater efficiency and competitiveness of those involved in order to stay in business. This scenario is producer/supplier independent, and social aspects related to their stay in the market. Although its share in sugarcane production is smaller than the plant itself, it is still considerable having reached around 20% to 25% in 2008 by employing labor, also production factors had an important economic impact in the regions where they operate. Therefore, this study aimed to estimate the economic efficiency and production of independent sugarcane producers in the state of Paraná through the DEA model. The Data envelopment analysis (DEA) is a nonparametric technique that, using linear programming constructs production borders from production units that employ similar technological processes to transform inputs into outputs.The results showed that of the total surveyed, 13.56% had maximum efficiency (an efficiency score equal to 1). The average efficiency under variable returns to scale (BCC-DEA) was 0.71024. One can thus conclude that for the majority of the samples collected, it might be better use of available resources to the in order to obtain the economic efficiency of the production process.
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This study was to evaluate the profitability of land use for production of sugar cane in the São Paulo North Region, under risk conditions, from two views: the owner operator and the cash rental operator. The owner operators have higher levels of profitability comparing to cash rental owners, but with higher levels of risk. The land owners aversive to risk fits better to rent system, since the minimum return is greater than the profitability of owners operators. Moreover, if the producer is willing to production risk, the income may reach approximately 3 times that one obtained by the tenants.