Impacts of plant growth-promoting rhizobacteria on tropical forage grass in Brazil.

The aim of this study was to evaluate the effects of plant growth-promoting rhizobacteria effects on anatomical characteristics and nutritional value of Brachiaria (Syn. Urochloa) brizantha cv. BRS Piatã. The experimental design applied was completely randomized design with three treatments: (1) non-inoculated unfertilized-control plants (C-), (2) non-inoculated fertilized-control plants (C+) and (3) B. brizantha inoculated with Pseudomonas fluorescens (BRM-32111) and Burkholderia pyrrocinia (BRM-32113). The following parameters were evaluated at 35 days after seedling emergence: biomass production, plant height, net photosynthesis (A), water-use efficiency (WUE), chlorophyll (SPAD), anatomical and nutritional. The rhizobacteria modified the anatomy of the leaf, culm and roots of B. brizantha. They also increased the chlorophyll content, A, WUE, total soluble carbohydrates, starch and crude protein contents, N, P, Mg and Fe concentrations, plant height, root area and biomass production. Therefore, we conclude that co-inoculation with P. fluorescens (BRM-32111) and B. pyrrocinia (BRM-32113) modified the anatomy and biochemistry of B. brizantha, promoting growth and nutrient accumulation. Therefore, these findings set up the basis for additional exploratory studies, using these rhizobacteria as biotechnological innovation with potential of use as biofertilizer in B. brizantha, aiming higher productivity and nutritive value in a more eco-friendly and sustainable pasture production system

Astrometry of the main satellites of Uranus: 18 years of observations

We determine accurate positions of the main satellites of Uranus: Miranda, Ariel, Umbriel, Titania, and Oberon. Positions of Uranus, as derived from those of these satellites, are also determined. The observational period spans from 1992 to 2011. All runs were made at the Pico dos Dias Observatory, Brazil. We used the software called Platform for Reduction of Astronomical Images Automatically (PRAIA) to minimise (digital coronography) the influence of the scattered light of Uranus on the astrometric measurements and to determine accurate positions of the main satellites. The positions of Uranus were then indirectly determined by computing the mean differences between the observed and ephemeris positions of these satellites. A series of numerical filters was applied to filter out spurious data. These filters are mostly based on the comparison between the positions of Oberon with those of the other satellites and on the offsets as given by the differences between the observed and ephemeris positions of all satellites. We have, for the overall offsets of the five satellites, -29 (+/-63) mas in right ascension and -27 (+/-46) mas in declination. For the overall difference between the offsets of Oberon and those of the other satellites, we have +3 (+/-30) mas in right ascension and -2 (+/-28) mas in declination. Ephemeris positions for the satellites were determined from DE432+ura111. Comparisons using other modern ephemerides for the solar system -INPOP13c- and for the motion of the satellites -NOE-7-2013- were also made. They confirm that the largest contribution to the offsets we find comes from the motion of the barycenter of the Uranus system around the barycenter of the solar system, as given by the planetary ephemerides. Catalogues with the observed positions are provided.Comment: 13 pages, 21 figure

Praticas de educação da criança na família: a emergência do saber técnico-científico

Face ao grande conjunto de dúvidas e inseguranças evidenciadas pelos adultos quando se deparam com a tarefa de educar as gerações mais novas, propôs-se este estudo contribuir para o aprofundamento da análise do processo de alteração das concepções que norteiam as atitudes assumidas pelos socializadores, ao longo deste século no Brasil, ai incluidos os fatores a ela associados bem como as orientações que costumam procurar. Dados de três pesquisas são analisados, e eles têm por base o relato oral e/ou a informação veiculada pela imprensa escrita. Os resultados mostram o surgimento e a busca do Conhecimento Cientifico a partir da década de 50, que se faz acompanhar de alterações profundas nas formas de criar e educar crianças na familia e permitem que se levante explicações para o faro de, na sociedade brasileira contemporânea, os pais terem tantas dúvidas quanto à melhor maneira de educar sua prole.Young parents currently have many doubts ahout how to rear their children, searching for orientation with professionals such as the pediatrician, the Psychologist, the Teacher. As thisis a new situation, a study was carried out with two objetives: the first one is to contribute to the analysis of the process of change in the childrearing conceptions that guided the socializers attitudes during this century in Brazil; the second one is to discuss the possible social variables, present in the context, that correlate with the observed changes. Data of three pieces of research - two done through Oral Reports (mothers between 28 and 75 years old were interviewed abouttheir childrearing practices) and one througl^1 Written Reports (176 numbers of The Christian Family Magazine from 1935 to 1988 were studied) - were selected to be analysed and acategorization of the reports was prepared before the application of three types of analysis: Quantitative Descriptive, Quantitative- Interpretative and Qualitative. The results were reported following some themes: 1. The evolution in the search for orientation to rear children in the XX Century; 2. The different kinds of orientation followed by the family; 3. The orientations that were given to the families to rear well their children; 4.The satisfaction and security to rear children in this century.The results show that before the 1 950’s a ‘Folk Wisdom’ predominated although the Pediatrician was beginning to be sought to give orientations to the mothers; afterwards,there are big changes in urbanization and industrialization in the Brazilian society and the ‘Scientific Knowledge’ started to be seen as the only one able to promote development and adequacy to a’modern’ society. This brought deep alterations in the way children used to be reared in the family and, as a consequence, parents’insecurity appears when-the ‘folk wisdom’ is rejected by the new generations

Predição de teores de atributos físicos e químicos dos solos de Rondônia por espectroscopia no infravermelho próximo.

O objetivo do presente trabalho foi avaliar o potencial da espectroscopia no infravermelho próximo aliada à análise multivariada de dados com estabelecimento de modelo quimiométrico para predição, simultaneamente, de cinco atributos do solo representativos do estado de Rondônia.Editores: Luciélio Manoel da Silva; Paulo Guilherme Salvador Wadt; Karina Thais Lima Buriti; Elaine Almeida Delarmelinda Honoré; Marcos Gervasio Pereira

Resistência a doenças da parte aérea e características físicas de frutos em genótipos de melão.

O objetivo deste trabalho foi avaliar oito linhagens avançadas e dois híbridos experimentais de melão Tipo Amarelo quanto à reação ao oídio e ao cancro-das-hastes, sob infecção natural, tendo a cv. Ribatejo como testemunha. O experimento foi conduzido em telado da Embrapa Semiárido, Petrolina, PE. Os genótipos foram cultivados em vasos, preenchidos com mistura (5 L) de solo natural mais esterco (3:1). O delineamento experimental foi inteiramente casualizado, com 11 tratamentos e 10 dez repetições. Avaliou-se a reação dos genótipos ao oídio e ao cancro-das-hastes, usando-se escalas de notas específicas para cada doença. Os frutos foram obtidos por polinização manual controlada e mensurados quanto à massa média (kg) e sólidos solúveis (°Brix). Os genótipos 10.2723.001 (L1) e 10.2716.001 (F1) foram os mais tolerantes ao oídio e 63,6% dos genótipos apresentaram reação de resistência ao cancro das hastes. Os sólidos solúveis variaram de 9,1 ºBrix a 13,4 ºBrix, sendo observados valores mais elevados em 36% dos genótipos. A massa dos frutos foi influenciada pelo cultivo em vasos e o genótipo 10.2716.001 (F1) se destacou dos demais com o maior valor para esta variável. Linhagens com tolerância/resistência às doenças ou com sólidos solúveis acima de 11 oBrix serão utilizadas em hibridação

Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations

The irregular satellites of the giant planets are believed to have been captured during the evolution of the solar system. Knowing their physical parameters, such as size, density, and albedo is important for constraining where they came from and how they were captured. The best way to obtain these parameters are observations in situ by spacecrafts or from stellar occultations by the objects. Both techniques demand that the orbits are well known. We aimed to obtain good astrometric positions of irregular satellites to improve their orbits and ephemeris. We identified and reduced observations of several irregular satellites from three databases containing more than 8000 images obtained between 1992 and 2014 at three sites (Observat\'orio do Pico dos Dias, Observatoire de Haute-Provence, and European Southern Observatory - La Silla). We used the software PRAIA (Platform for Reduction of Astronomical Images Automatically) to make the astrometric reduction of the CCD frames. The UCAC4 catalog represented the International Celestial Reference System in the reductions. Identification of the satellites in the frames was done through their ephemerides as determined from the SPICE/NAIF kernels. Some procedures were followed to overcome missing or incomplete information (coordinates, date), mostly for the older images. We managed to obtain more than 6000 positions for 18 irregular satellites: 12 of Jupiter, 4 of Saturn, 1 of Uranus (Sycorax), and 1 of Neptune (Nereid). For some satellites the number of obtained positions is more than 50\% of what was used in earlier orbital numerical integrations. Comparison of our positions with recent JPL ephemeris suggests there are systematic errors in the orbits for some of the irregular satellites. The most evident case was an error in the inclination of Carme.Comment: 9 pages, with 3 being online materia

Brachiaria brizantha cv. Marandu em sistema silvipastoril.

bitstream/CNPAB-2010/36212/1/bot033.pd

Modelling integrated crop-livestock systems: preliminary results from an agroecosystem model.

ABSTRACT. Integrated Crop-Livestock Systems (ICLS) are being considered to improve food production sustainability and are of increasing interest to the modelling community worldwide. Our goal was to evaluate the ability of an agroecosystem model simulator (ECOSMOS) to predict plant growth and yield, and water dynamics in an ICLS in the Western region of São Paulo State, Brazil. Four fields of approximately 50 ha each were monitored after the implementation of the ICLS at the end of 2018. Soybean yields (two seasons), mixed-pasture aboveground dry biomass and soil water content (for the pasture only) measurements were contrasted with predictions from ECOSMOS with recently implemented soybean and pasture sub-models. Preliminary results from a generic simulation for the whole farm showed that the model was able to capture fairly well the seasonal variation in growth and water dynamics. Such results suggest that the existing knowledge and modelling approaches embedded in the model are robust. Future steps toward modelling the ICLS will involve to parameterise the model for Brazilian cultivars of the system using data from controlled/manipulative experiments, develop a framework to simulate two plants concomitantly, and then assess its capability to predict environmental variables of interest, such as carbon dynamics.WCCLF 2021. Evento online