PRODUTIVIDADE E QUALIDADE FISIOLÓGICA DE SEMENTES DE MILHO-PIPOCA SUBMETIDO À APLICAÇÃO FOLIAR DE MOLIBDÊNIO

The goal of this work was to evaluate the effects of molybdenum increasing doses in popcorn crop, aiming to increasing the nutrient content in seeds, the influence of seed physiological quality and the crop yield.  A field experiment was performed in a randomized block design, with four replications of seven doses of molybdenum (0, 50, 100, 200, 400, 800 and 1600 g ha-1). The doses of 0, 50, 100, 200 and 400 g ha-1 were applied 15 days after seedling emergence (DAE), the dose of 800 g ha-1 were applied in three portions as following: 400 g at 15 DAE, 200 g at 20 days and 200 g at 25 DAE; and the dose of 1600 g ha-1 in four equal portions of 400 g at 15, 20, 25 and 30 DAE. Yield components, nutrient content in leaves and seeds, and the seed physiological quality of popcorn were evaluated. The molybdenum content in leaves and seeds were influenced by the application of this micronutrient, reaching maximum values with the higher dose. The total number of seeds per plot and the yield were also influenced by molybdenum application, reaching maximum values of 21448 seeds and 4250 kg ha-1, with the doses of 680 g ha-1 and 1600 g ha-1, respectively. Molybdenum doses up to 1600 g ha-1 did not change the physiological quality of popcorn seeds.O objetivo deste trabalho foi avaliar o efeito de doses crescentes de molibdênio na cultura do milho-pipoca, visando aumentar o teor deste nutriente nas sementes, a influência na qualidade fisiológica das sementes e a produtividade da cultura. Foi conduzido um experimento em campo, no delineamento de blocos ao acaso, com quatro repetições e sete doses de molibdênio (0, 50, 100, 200, 400, 800 e 1600 g ha-1). As doses de 0, 50, 100, 200 e 400 g ha-1, foram aplicadas de uma só vez aos 15 dias após emergência das plântulas, (DAE); a dose de 800 g ha-1 foi aplicada em três parcelas, sendo 400 g aos 15 DAE, 200 g aos 20 DAE e 200 g aos 25 DAE e a dose de 1600 g ha-1 parcelada em quatro vezes iguais de 400 g ha-1 aos 15, 20, 25 e 30 DAE. Foram avaliados os componentes de produtividade, os teores dos nutrientes nas folhas e nas sementes e a qualidade fisiológica das sementes do milho-pipoca. O teor de molibdênio nas folhas e nas sementes foram influenciados pela aplicação deste micronutriente, atingindo valores máximos com a maior dose aplicada. O número total de sementes por parcela e a produtividade também foram influenciados pela aplicação de molibdênio atingindo valores máximos de 21448 sementes e 4250 kg ha-1, com as doses de 680 g ha-1 e 1600 g ha-1, respectivamente. Doses de molibdênio até 1600 g ha-1 não alterou a qualidade fisiológica das sementes de milho-pipoca

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

Produtividade e teores foliares de nutrientes na cultura do feijão (Phaseolus vulgaris L.) em resposta à aplicação foliar de sulfato de cobre, com ou sem neutralização

Visando estudar o efeito da aplicação foliar de sulfato de cobre, com e sem neutralização, sobre feijoeiros, foi conduzido um experimento em condições de campo, em área da Universidade Federal de Viçosa. O micronutriente - Cu - foi aplicado em pulverização foliar, no início do florescimento, na forma de sulfato de cobre (CuSO4.5H20), com e sem neutralização nas concentrações 0; 0,25; 0,50; 0,75; e 1,00%. Foram avaliados a produtividade, o peso de 100 grãos e os teores foliares de N, P, K, Ca, Mg, B, Cu, Fe, Mn e Zn. Pelos resultados obtidos constatou-se que o sulfato de cobre neutralizado possibilitou a obtenção de resultados mais consistentes e superiores aos encontrados com o sem neutralização. -A concentração mais adequada de sulfato de cobre pentaidratado na solução está em torno de 0,50%.In order to study the effect of copper sulphate in solutions with and without neutralization, sprayed on bean leaves, an experiment was carried out under Held conditions at the Federal University of Viçosa, Minas Gerais, Brazil. The micronutrient - Cu - was applied on the leaves at the onset of flowering in copper sulphate (CuSO4.5H20) solutions, with and without neutralization at salt concentrations of 0; 0.25; 0.50; 0.75 and l.00%. Yiield, net weight of 100 seeds and foliar contents of N, P, K, Ca, Mg, B, Cu, Fe, Mn and Zn were evaluated. The results indicated that the use of copper sulphate in neutralized solutions helped achieve better results than the used of copper in non neutralized solutions. The best results were obtained when using about 0.50% salt solution concentration

Influência do conteúdo de molibdênio na qualidade fisiológica da semente de feijão: cultivares Novo Jalo e Meia Noite

Avaliou-se, neste trabalho, a influência do conteúdo de molibdênio na qualidade fisiológica das sementes de feijão, cultivares Novo Jalo e Meia Noite. O experimento realizou-se no Laboratório de Sementes/UFV, Viçosa-MG, em maio-junho/2003. Em cada cultivar, foram estudados seis conteúdos de Mo na semente (Novo Jalo: 0,072, 0,74, 1,56, 2,554, 3,892 e 6,767 µg de Mo; Meia Noite: 0,097, 0,364, 0,761, 1,601, 2,645 e 3,158 µg de Mo), em ensaios distintos, submetidos a teste de germinação e vigor, em delineamento inteiramente casualizado, com quatro repetições. Verificou-se influência do conteúdo de Mo da semente na sua qualidade fisiológica, sendo os valores de 3,1 e 2,2 µg semente-1 os pontos de máxima qualidade fisiológica para os cultivares Novo Jalo e Meia Noite, respectivamente. A dose ótima de Mo para produção de sementes de feijão de elevada qualidade fisiológica é de 600 e 1.200 g ha-1 , para os cultivares Meia Noite e Novo Jalo, respectivamente.This work evaluated the effect of molybdenum content on the physiological quality of bean seeds, cultivars Novo Jalo and Meia Noite. The experiment was carried out at the Seed Laboratory /UFV, Viçosa-MG, in may-junho/2003. Six Mo contents were tested in seeds of the two cultivars (Novo Jalo: 0.072, 0.74, 1.56, 2.554, 3.892 and 6.767 μg of Mo, and Meia Noite: 0.097, 0.364, 0.761, 1.601, 2.645 and 3.158 μg of Mo), in different assays, complemented with germination and vigor tests, in a complete randomized design, with four repetitions. The effect of Mo content on the seed physiological quality was confirmed, with contents of 3.1 and 2.2 μg seed -1 the values giving maximum physiological quality for cvs. Novo Jalo and Meia Noite, respectively. Optimum Mo dose for production of bean seeds with high physiological quality is 600 and 1200 g ha -1 , for the cvs. Meia Noite and Novo Jalo, respectively

Application of molybdenum and a desiccant herbicide to the common bean under direct seeding

ABSTRACTApplying micronutrients together with the herbicides used in plant desiccation can ensure an adequate supply of these nutrients and a reduction in production costs under a direct seeding (DSS) system. The aim of this study was to evaluate the effect of dosages of molybdenum (Mo), applied both in a desiccation operation together with glyphosate on the straw of brachiaria (Brachiaria brizantha) and separately via the leaves, on the common bean (cultivar Ouro Vermelho) grown under DSS. A randomised block design was used with four replications in an arrangement of sublots. In the lots, dosages of Mo (0, 0.1, 0.2, 0.4 and 0.8 kg ha-1) were applied together with the desiccant herbicide (glyphosate), and in the sublots, two dosages of Mo (0 and 100 g ha-1) were applied via the leaves. Two experiments were carried out in the town of Coimbra, in the state of Minas Gerais, Brazil, one in 2009 and the other in 2010 (the same treatments having been applied in the experimental area in 2008). Foliar fertilization was carried out with sodium molybdate [(Na2MoO4) (39% Mo)] at stage V4 in the bean plants. The application of Mo, whether mixed with the desiccant or applied via the leaves, had no significant effect on yield components or on productivity. Levels of Mo and N in the grain, and of N in the leaves, increased with the application of Mo, both when mixed with the desiccant and applied via the leaves

Molybdenum mixed with glyphosate and alone via foliar spray in no-tillage common bean grown on corn stover

The effect of molybdenum (Mo) on common bean grown in desiccated corn stover in a no-tillage system was evaluated under two application modes: Mo mixed with the desiccant glyphosate and Mo direct spray to the bean leaves. The treatments (four replicates) were assigned to a completely randomized block design in a split-plot arrangement with the application of Mo (0, 100, 200, 400 and 800 g ha-1) mixed with glyphosate in the main plots and Mo foliar spray (0 and 100 g ha-1) in the sub-plots. The field experiments were carried out in 2009 and 2010 in the municipality of Coimbra, Minas Gerais State, with the common bean cultivar Ouro Vermelho. Mo mixed with glyphosate had neither an effect on common bean yield nor on the Mo and N contents in leaves, however it increased the Mo and N contents in seeds. Application of Mo via foliar spray increased Mo content in leaves and Mo and N contents in seeds. The reapplication of molybdenum with glyphosate for desiccation in subsequent crops caused a cumulative effect of Mo content in bean seeds

Dualidades nas propostas editoriais de música antiga brasileira Editorial propositions's dichotomies in Brazilian early music

A partir da primeira publicação de caráter musicológico de música brasileira do século XVIII, realizada em 1951 por Francisco Curt Lange (Archivo de Música Religiosa de la "Capitania Geral das Minas Gerais"), surgiram iniciativas brasileiras que manifestaram as mais variadas propostas editoriais. O estudo das edições produzidas no país nas últimas cinco décadas revela várias dualidades, dentre as quais as dez mais importantes serão abordadas neste artigo: 1) publicação ou circulação informal; 2) Gesamtausgaben ou Denkmähler; 3) edição acadêmica ou edição prática; 4) fontes de um único acervo ou de vários; 5) obra isolada ou coletânea; 6) trabalho individual ou trabalho de equipe; 7) obras inéditas ou já divulgadas; 8) financiamento privado ou de instituições governamentais; 9) apenas partitura ou partituras e partes; 10) divulgação em papel ou em meios eletrônicos. Além da identificação dessas dualidades, o objetivo deste artigo é tentar compreender o seu significado e relacioná-las às atuais perspectivas editoriais da música antiga no país.<br>Departing from the first musicological publication about eighteenth-century Brazilian music by Francisco Curt Lange in 1951 (Archivo de Música Religiosa de la "Capitania Geral das Minas Gerais"), other initiatives appeared in Brazil manifesting a wide range of editorial solutions. The study of the editions produced in this country in the last five decades reveals several dichotomies, ten of the most important being: 1) published work or informal circulation; 2) Gesamtausgaben or Denkmähler; 3) academic edition or interpretive edition; 4) sources from one or several collections; 5) isolated work or collective works; 6) individual work or team-work; 7) unpublished works or previously published works; 8) private funding or governmental funding; 9) scores only or scores and parts; 10) paper or digital/electronic publishing. Besides the identification of those dichotomies, the objective of this paper is to understand their meanings and relate them to the current editorial perspectives of early music in Brazil

Second serological inquiry on migratory birds resident in Lagoa do Peixe National Park for detection of West Nile Fever and other viruses

Ministério da Saúde. Secretaria de Vigilância em Saúde. Brasília, DF, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Brasília, DF, Brasil.Secretaria Municipal de Saúde. Recife, PE, Brasil.Secretaria de Estado de Saúde. Campo Grande, MS, Brasil.Ministério da Agricultura, Pecuária e Abastecimento. Brasília, DF, Brasil.Zoológico de Brasília. Brasília, DF, Brasil.Universidade Federal de Pernambuco. Recife, PE, Brasil.Universidade Federal de Pernambuco. Recife, PE, Brasil.Universidade Federal do Rio Grande do Sul - PROAVES. Porto Alegre, RS, Brasil.Secretaria Estadual de Saúde. Porto Alegre, RS, Brasil.Zoológico de Brasília. Brasília, DF, Brasil.Secretaria Estadual de Saúde. Porto Alegre, RS, Brasil.Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis. Centro Nacional de Pesquisa para a Conservação das Aves Silvestres. Brasília, DF, Brasil.Ministério da Agricultura, Pecuária e Abastecimento. Brasília, DF, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Belém, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Belém, PA, Brasil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Belém, PA, Brasil