Productivity and water suppression in different beans (Phaseolus vulgaris L.) phenological stages

Common Bean (Phaseolus vulgaris L.) is widespread in the social and economic scene in Brazil, as well it is Brazilian population main dish, and it also helps small and medium farmers' income. The objective of this study was to compare the productivity performance of common bean Carioca - IAC Alvorada with irrigation suppression in each of the five phenological phases. The experiment was conducted in plots in a greenhouse at College of Agronomical Sciences, São Paulo State University (UNESP), Botucatu - SP. The hypothesis is that if the water supply is suppressed in one of the five development stages of irrigated common beans, the yield reduction would be at least 20%. The treatments consisted of suppression irrigation in one of the five development stages (stage V1 to V3, stage V4 to early flowering, flowering stage, pod formation stage and pod filling stage) compared with the irrigation at all stages and suppression of irrigation at all stages, with seven treatments and four replications. The treatments most affected by water suppression were those which suffered suppression of irrigation during the vegetative phase and flowering stage. Treatments with water suppression in all stages, and suppression during the phases (stage V1 to V3, stage V4 to early flowering, flowering stage, pod formation stage and pod filling stage) showed yield reduction of approximately 95%, 55.1%, 49.5%, 63,1%, 30.2% and 35.6%, respectively, when compared to treatment with irrigation all stages. All treatments considered confirmed the hypothesis.

Protective effect of oregano (Origanum vulgar L.) and thyme (Thymus vulgaris L.) oleoresins in stored soybean oil

Purpose: The objective of this study was to evaluate the antioxidant effect of oregano and thyme extracts isolatedly and combinedly applied in soybean oil. Design/methodology/approach: Soybean oil containing 3,000 mg/kg of oregano and thyme oleoresins and the mixture of both, as well as soybean oil containing TBHQ (50 mg/kg) and soybean oil free of antioxidants, were subjected to accelerated oven test (60°C/10 days). Samples were collected every two days and analyzed as to their peroxide and conjugated diene values. Findings: The mixture of oleoresins and consequent increase of concentration were as effective as the antioxidant TBHQ. Practical implications: These studies may prove to be beneficial to the exploitation of natural antioxidant sources for the preservation and/or extension of raw and processed food shelf life. Therefore, they could also be applied in the area of pharmaceuticals for the protection of human life. Originality/value: This study offers information on the use of natural antioxidants as an alternative to the use of synthetic antioxidants, which might be considered toxic. © Emerald Group Publishing Limited.

O modelo 'hydrotime' pode descrever a resposta de sementes de feijão comum (phaseolus vulgaris l.) à temperatura e potenciais de água reduzidos

Germination parameters of the response to temperature and water potential from four common bean (Phaseolus vulgaris) lines based on thermal-time and hydrotime concepts were estimated to verify to what extent they can predict germination under different thermal and water conditions. The cultivars IPR Uirapuru and IAPAR 81 (drought-tolerant), and Grauna and Carioca (not tolerant) were used. The isothermal assays were performed in a temperature gradient block, and the assays with different osmotic potentials (PEG 6000) were performed in germination chambers. Seeds from drought-tolerant cultivars spent less time to germinate at supra-optimum temperatures than non-tolerant ones, and the cultivar Uirapuru (drought-tolerant) germinated faster in response to reduced Ψ and low temperatures. The parameter Ψb(50) did not discriminate between drought-tolerant and non-tolerant lines at the infraoptimum temperature range, but it can be used to identify drought-tolerant lines at high temperatures. In general, the hydrotime model reproduced the actual germination data relatively well, chiefly at higher temperatures. This study evidenced that the hydrotime model can be used to describe the germination of common bean seeds under reduced water potentials, and as a screening tool for drought-tolerant bean genotypes.

Efeitos fisiológicos da piraclostrobina em plantas de feijão (Phaseolus vulgaris L.) condicionado sob diferentes tensões de água no solo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Resposta do feijoeiro (Phaseolus vulgaris L.) à adubação nitrogenada de cobertura em dois sistemas de manejo de solo

Pós-graduação em Agronomia (Agricultura) - FCA

Descrição da resposta germinativa de cultivares de Phaseolus vulgaris L. (Fabaceae) à temperatura e ao potencial osmótico

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

Caracterização morfológica, citogenética e palinológica de genótipos de feijão-vagem (Phaseolus vulgaris L.) - Fabaceae

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Adubação orgânica e biodinâmica na produção de chicória (cichorium endivia) e de beterraba (beta vulgaris), em sucessão

Pós-graduação em Agronomia (Horticultura) - FCA

Comparação da ocorrência de insetos na cultura do feijoeiro (Phaseolus vulgaris L.) cultivado nos sistemas orgânico e convencional

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Adubação nitrogenada e resíduos vegetais no desenvolvimento do feijoeiro (Phaseolus vulgaris L.) em sistema de plantio direto

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

Comportamento de genótipos de feijão (Phaseolus vulgaris L.) na época das águas em São Manuel - SP

Pós-graduação em Agronomia (Agricultura) - FCA

Efeitos do estresse induzido por polietileno glicol (PEG 6000) em feijoeiro (Phaseolus vulgaris L.)

Pós-graduação em Agronomia (Agricultura) - FCA

Produtividade da cultura do feijão (Phaseolus vulgaris L.) irrigada por aspersão convencional com diferentes métodos de estimativa de lâmina de irrigação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Consumo e custo de energia elétrica em feijão (Phaseolus vulgaris L.) irrigado, afetado por quatro métodos de manejo de irrigação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Controle de pragas na cultura do feijão (Phaseolus vulgaris L.) e avaliação econômica

Pós-graduação em Agronomia (Proteção de Plantas) - FCA