Alterações de propriedades físicas de um nitossolo vermelho pela sucessão milheto-soja na fase de implantação do sistema de semeadura direta

The aim of this work was to evaluate the effect of a millet-soybean rotation, during the implantation phase of no-tillage system on the physical properties of a Nitossolo Vermelho distroférrico and the dry mass production of millet and the productivity of soybean. The experimental design used was a randomized blocks, in a split splot arrangement, with four replications. The parcels was constituted by three sowings (E1, E2 and E3) and the subparcels was constituted by harvests, where each harvest handling was: M1 - harvest each blooming and covering withdrawal; M2 - harvest each blooming and covering permanency; M3 - only in the first harvest on blooming and covering withdrawal; M4 - only in the first harvest on blooming and covering permanency, and M5-free growing, with no harvest. Samples were collected from three soil layers: 0-0,05, 0,05-0,10 and 0,10-0,20 m. The E2 showed smaller values of soil density and larger values of total porosity. The E3 resulted in smaller values of flocculation degree and mean weight diameter of the aggregates. The E3 showed smaller production of dry mass.

Fatores preditivos do sucesso da inseminação intrauterina: A morfologia espermática de acordo com o novo manual de laboratório da Organização Mundial de Saúde

Objective: The aim of our study was to assess the likelihood of IUI success as a function of the previously described predictive factors, including sperm morphology according to the new reference values defined by WHO. Material and Methods: This retrospective study enrolled 300 couples which underwent IUI. Regression analyses were used to correlate maternal age, number of preovulatory follicles on the day of hCG administration, number of inseminated motile sperm, and normal sperm morphology with clinical pregnancy. Results are expressed as odds ratio (OR) with 95% of confidence intervals (CI). Results: Women older than 35 years showed a lower pregnancy rate (6.5% vs 18.2%, p=0.017). Logistic regression models confirmed the lower chance of pregnancy occurrence for older women (OR: 0.39; CI: 0.16-0.96; p=0.040). The presence of two or more preovulatory follicles on the day of hCG administration resulted in higher pregnancy rate when compared to cases in which only one preovulatory follicle was present (18.6% vs 8.2%, p=0.011). The regression model showed a more than two fold increase on probability of pregnancy when two or more preovulatory follicles were detected (OR: 2.58; CI: 1.22-5.46, p=0.013). The number of inseminated motile sperm positively influenced pregnancy occurrence (OR: 1.47; CI: 0.88-3.14, p=0.027). Similar pregnancy rates were observed when semen samples were classified as having normal or abnormal morphology (10.6% vs 10.2%, p=0.936). Conclusion: Our results demonstrate that sperm morphological normalcy, according to the new reference value, has no predictive value on IUI outcomes. © Todos os direitos reservados a SBRA - Sociedade Brasileira de Reprodução Assistida.

Identificação e priorização dos fatores críticos de sucesso na implantação de fábrica digital

A Digital Factory is a concept which improves the collaboration among product development processes. Despite the benefits brought by this concept, failures may occur in its implementation. This paper aims to present the Critical Success Factors in the implementation of a Digital Factory project in a Brazilian company. These factors were identified by an exploratory survey on the implementation of Enterprise Resource Planning and Product Lifecycle Management among other systems. Following this identification, the factors were prioritized using the Delphi Method and the Analytic Hierarchy Process; this evaluation was carried out by professionals from enterprises which implement Digital Factory projects, in Brazil and abroad. Nine factors were identified. The five main priorities were: Continuous Support and Commitment from Top Management; Comprehensive Business Reengineering; Skilled and Experienced Partners; Participation and Commitment of Users; and Appropriate Role of the Project Manager.

Atributos físicos do solo em diferentes condições de cobertura vegetal em área de plantio direto

The use of cover crops in the soil causes changes in soil attributes influencing in a series of hydro-physical processes, which also modify the ability of soil to support the many activities that it is intended. Thus, the objective of this study was to evaluate the effect of cover crops on physical attributes of the soil. For this, an experiment was carried out on a Typic Hapludox, Jaboticabal State, Brazil, using cover crops of millet, sunn hemp, jack bean, lab-lab and black velvet bean in no-tillage and fallow area (spontaneous vegetation). The characteristics evaluated were the bulk density, macroporosity, microporosity, total porosity, aggregate stability, penetration resistance and organic matter. The incorporation of cover crops has proved to be a beneficial practice for the physical attributes of the soil, allowing a greater aggregate stability compared to fallow in the depth of 0-0.05 m. All cover crops presented values of soil penetration resistance below the critical value of 2 MPa.

Perfilhamento do trigo em função da aplicação de regulador vegetal

Tillers survival and yield potential are genetically determined and strongly influenced by environmental conditions during the emission and establishment stage. This experiment was carried in order to study effects of application of growth regulator (Ax+GA+CK) on tiller survival and yield potential of wheat. The experiment was carried out from March to July 2010. A 2 × 2 factorial randomized block design with five replications was used. Two wheat cultivars (IAC 370 and IAC 375) and application or not of Ax+GA+CK at the beginning of tillering stage were evaluated. Tiller emission were evaluated at five ages (19, 26, 33, 40 e 47 days after emergence) and yield components were determined by each individual structure evaluation, comparing to the main stem. Growth regulator application improved the tiller survival when emitted in the first week after application. Tiller yield potential decreased in late emission periods of tillers in both cultivars tested, influenced by different traits of each cultivar. IAC 370 showed higher tiller emission, however, the number of viable tillers were higher for the IAC 375.

Adubação nitrogenada e inoculação com rizóbio no feijoeiro em sucessão ao milho consorciado com braquiárias no sistema plantio direto

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Alterações dos atributos químicos do solo e resposta da soja à cobertura vegetal e à calagem superficial na implantação do sistema de semeadura direta

Pós-graduação em Agronomia (Agricultura) - FCA

Utilização de índices de vegetação para estimativa da proteção do solo pela cobertura vegetal: uma contribuição para o uso da equação universal das perdas de solo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

SIG e sensoriamento remoto aplicado ao estudo dos processos de inundação e mapeamento da cobertura vegetal na planície fluvial do alto Rio Paraná

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito da privação de ninho sobre a agressividade e o sucesso de acasalamento em machos de tilápia do Nilo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Efeitos indiretos de predadores e de herbívoros florais e foliares no comportamento de visitantes florais e sucesso reprodutivo de Rubus rosifolius

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise dos processos de decomposição e sucessão ecológica em carcaças de suínos (Sus scrofa L.) mortos por disparo de arma de fogo e overdose de cocaína e protocolo de procedimento diante de corpo de delito

Pós-graduação em Biologia Geral e Aplicada - IBB

Avaliação florística e de aspectos da estrutura da comunidade de um reflorestamento com dois anos e meio de implantação no município de Mogi Guaçu-SP

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Morfoanatomia dos capítulos e biologia da polinização de Syngonanthus elegans (Bong.) Ruhland (Eriocaulaceae - Poales)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Chuva de sementes em uma área em processo de restauração vegetal em Santa Cruz das Palmeiras (SP)

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC