Simbioses de rizóbios com leguminosas arbóreas na pré-amazônia maranhense

The tree leguminous gliricídia (Gliricidia sepium), acácia (Acacia mangium), leucena (Leucaena leucocephala) and sombreiro (Clitoria fairchildiana) are indicated for agroforestry systems, reclamation of degraded lands, reforestation and other purposes in the wet tropic. Despite the importance of legumes the preamazon region it is lacking in information about the symbiotic capacity and diversity of indigenous rhizobia of these legumes. The aim of this work was to evaluate the phenotypic and genetic diversity of rhizobia species nodulating gliricidia sombreiro, leucena and acacia in the Maranhão pre-Amazon region and authenticate isolates of these species in siratro (Macroptilium atropurpureum). For this they were installed two experiments. Sampling was carried out on a alley cropping system, was sampled 20 plants of each species by collecting 10 nodules per plant. It was made isolation, cultural characterization, partial 16S rRNA gene sequencing and analysis of the symbiotic ability of bacterial strains with siratro. The authentication experiment was done in two steps for each legume (gliricidia, acácia, sombreiro and leucena), in the greenhouse and in a completely randomized design with three replications with sterile Hoagland nutrient solution as substrate. Gliricídia, Sombreiro, leucena and acacia are colonized by distinct groups of rhizobia. Gliricidia nodulate preferably with Rhizobium, sombreiro and acacia nodulate preferably with Bradyrhizobium and leucena has Mesorhizobium main symbiote. Endophytic strains of ten genera were found colonizing the gliricidia, sombrero, leucena and acacia nodules and a strain of Arthrobacter sp. had a positive nodulation with siratro. This is the first report on isolation of Methylobacterium sp. in gliricidia nodules and endophytic ability of Terriglobus sp. strains. Indigenous strains of pre-Amazon region of Bradyrhizobium, Mesorhizobium and Rhizobium genus nodulate with siratro, but are ineficiente or had low efficiency to promote their growth.

Determinação da densidade amostral ótima para a geração de mapas temáticos na cafeicultura de precisão

Among the crops commercially exploited in Brazil, the coffee has a great economic importance, especially in the states of Minas Gerais and Espirito Santo. In the search for higher yield and lower environmental impact, farmers and researchers seek to develop new technologies that result in greater efficiency in various production processes of the coffee. For this, the adoption of precision agriculture in the management of operations in coffee crops, called precision coffee, has shown results that justify its use, by identifying the spatial variability of several variables, allowing its localized management and in the proper intensity. Unlike conventional management that is based on the average of observations in an area, precision agriculture uses a more detailed sampling, based on a sampling grid, which allows to represent in greater detail the reality of farming. Many previous studies have identified the spatial variability of the production of coffee system variables, but without worrying about the quality of information obtained due to the sampling grid used as precision and accuracy. Given the above, the objective of this study was to evaluate the quality of four different sampling grids for different variables and three times, in order to identify the most appropriate grid for use in precision coffee. Also aimed to compare the results between the precision coffee and conventional, according to reference values.

A sucessão ecológica em ambientes florestais em restauração: estrutura e dinâmica da regeneração natural

Ecological restoration aims to restore the self-sustainability potential of degraded environments. The successional trajectory of areas in restoration may differ from the reference ecosystem on a number of factors, especially the disturbance history of the area and management techniques applied in order to reverse the degradation scenario. In this sense, the objective of this study was to characterize the dynamics of natural regeneration and the structure of the regenerating community in an area of ecological restoration for 25 years on the right bank of the Rio Grande in the Power Station in Camargos that belongs to the Companhia Energetica de Minas Gerais - CEMIG, Nazareno, MG, in order to identify the current state of environmental regeneration. In November 2014, there was the first community inventory of seedlings existing in regeneration subplots (2 x 2 m) within the inclusion criteria (height ≥ 10 cm and DBH <5 cm), divided into 44 subplots (11 plots) in two areas, one area in restoration (REF) and a fragment of native vegetation (FRAG). In October 2015, the second sampling was carried out, in which individuals were resampled and recruits and dead individuals quantified. The parameters abundance, floristic similarity, density, dominance, importance value, equability, richness and diversity were analyzed in both samples. The dynamics was evaluated for the number of individuals and basal area in the period of 2014-2015 and individuals distributed according to height. The history of usage area provoked different behavior between the study environments; the patterns of the FRAG and REF communities along the years allowed the distinction between environments and demonstrated great environmental diversity, with differences in the abundance of species, floristic similarity, richness, diversity, vertical structure and dynamics parameters. In the REF area, there was a considerable increase in the density of individuals along the years and the establishment of different species. In this sense, the evaluation of natural regeneration in REF has shown that resilience is gradually being resumed, a necessary condition to support the potential for environmental self-sustainability. However, given the disturbance history, it can be concluded that the environment moves to an alternative state, which is possibly different from that prior to degradation.

Desenvolvimento de um método de análise por injeção em fluxo (FIA) para determinação de dissulfeto de tetrametiltiuram (tiram) utilizando reagente imobilizado em reator de fase sólida (RFS)

Pós-graduação em Química - IBILCE

Caracterização da deposição atmosférica e aporte de espécies químicas no principal corpo aquático da cidade de São José do Rio Preto, SP

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

Carbono orgânico solúvel em água no material particulado de regiões canavieiras do Estado de São Paulo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Construção e calibração de amostrador passivo para determinação de ozônio troposférico

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desenvolvimento de método para determinação de composição de atmosfera modificada pela presença de inibidores de corrosão

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo da determinação do 1-Nitropireno em material particulado atmosférico

Pós-graduação em Química - IQ

Avaliação e monitoramento da qualidade da água na microbacia do córrego Caçula no Município de Ilha Solteira-SP

Pós-graduação em Engenharia Civil - FEIS

Diagnóstico da qualidade e disponibilidade de água na microbacia do Córrego Água da Bomba no município de Regente Feijó - SP

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

Diagnóstico da influência da bacia hidrográfica na qualidade da água do Ribeirão Baguaçu (Araçatuba, SP)

Pós-graduação em Engenharia Civil - FEIS

Taxas de ovulação e prenhez em novilhas nelore cíclicas após utilização de protocolos para insiminação artificila em tempo fixo (IATF), com diferentes concentrações de progesterona, associadas ou nao a aplicação de eCG

Pós-graduação em Medicina Veterinária - FMVZ

Análise ambiental de um aterro sanitário e sua influência relativa sobre a qualidade das águas superficiais do entorno

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A comunidade perifítica e suas relações com a qualidade da água no reservatório de Itupararanga (SP, Brasil)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)