A5026505893- Rice Cultivation and Yield Improvement
- Irrigation Practices and Water Management
- Ethnobotanical and Medicinal Plants Studies
- Plant responses to water stress
- Herbal Medicine Research Studies
- Soil Management and Crop Yield
- Natural Antidiabetic Agents Studies
- Climate change impacts on agriculture
- Crop Yield and Soil Fertility
- Diverse Scientific Research Studies
- Weed Control and Herbicide Applications
- Sugarcane Cultivation and Processing
- Phytochemistry and Biological Activities
- Essential Oils and Antimicrobial Activity
- Rural Development and Agriculture
- Free Radicals and Antioxidants
- Agricultural Systems and Practices
- Pharmacological Effects of Natural Compounds
- Environmental and biological studies
- Growth and nutrition in plants
- Wheat and Barley Genetics and Pathology
- Chemical synthesis and alkaloids
- Traditional and Medicinal Uses of Annonaceae
- Banana Cultivation and Research
- Agricultural Innovations and Practices
Universidade Federal de Santa Maria
2016-2022
International Rice Research Institute
2022
University of Lisbon
2010-2015
Recent studies on yield gap analysis for rice in Southeast Asia revealed different levels of intensification across the main 'rice bowls' region. Identifying key crop management and biophysical drivers gaps provides opportunities comparative analyses, which are crucial to better understand scope narrow increase resource-use efficiencies The objective this study was decompose into their efficiency, resource, technology components map sustainably production four lowland irrigated areas through...
ABSTRACT Process-based-models can predict leaf and reproductive development of agricultural crops. The objective this study was to calibrate evaluate the SimulArroz model in simulating number leaves on main culm phenology three hybrid rice cultivars Rio Grande do Sul, Brazil. Field experiments were conducted Santa Maria, Cachoeirinha, Uruguaiana Vitória Palmar, Sul state, two growing seasons. Observations made determine through Haun scale (PRIME CL, INOV CL QM 1010 CL) a conventional...
Abstract Most studies about yield potential (Yp) of modern rice ( Oryza sativa L.) varieties have been grown under tropical conditions Asia, and little is known the Yp in subtropics Brazil, biggest producer outside Asia. Playing a key role global production, it necessary to estimate amount that Brazil can potentially produce. The objective this study provide estimations southern by using SimulArroz v1.1 ORYZA v3 models. Models were calibrated evaluated with data collected from five growing...
Resumo: O objetivo deste trabalho foi avaliar a calibração e o desempenho do modelo SimulArroz na simulação acúmulo de matéria seca da produtividade grãos cultivares arroz híbrido irrigado por inundação no Rio Grande Sul. Os experimentos foram conduzidos em delineamento blocos ao acaso Santa Maria, Cachoeirinha, Vitória Palmar, Uruguaiana, Bagé, Camaquã Cachoeira Em Maria avaliados parte aérea três híbridas (Prime CL, Inov CL QM 1010 CL) uma convencional usada como testemunha (Irga 424). Nos...
Abstract: The objective of this work was to model weedy rice (Oryza sativa) and barnyard grass (Echinochloa spp.) competition with flood-irrigated rice, introducing it as a submodule into the SimulArroz model. both weeds irrigated modeled using rectangular hyperbola equation. “i” “a” coefficients for each these were obtained from literature field experiments carried out in state Rio Grande do Sul, Brazil. In SimulArroz, yield loss applied penalize all three technological levels (high,...
Abstract: The objective of this work was to model, in the SimulArroz three flood-irrigated rice (Oryza sativa) cultivars currently most grown state Rio Grande do Sul, Brazil. experiments calibrate and validate model were conducted municipalities Cachoeirinha, Santa Maria, Uruguaiana, Vitória Palmar, Cachoeira Sul during four crop seasons. number leaves, phenology, aboveground dry matter biomass, yield each cultivar evaluated. results showed a slight overestimate R1, R4, R9 stages; however,...
Resumo: O objetivo deste trabalho foi avaliar um método de previsão safra arroz irrigado por inundação para o Rio Grande do Sul, meio modelo SimulArroz e climático regional RegCM4. Dados diários temperatura mínima, máxima radiação solar, simulados a partir nove membros RegCM4, foram usados como dados entrada no safra. Para testar desempenho da safra, experimentos realizados durante ano agrícola 2013/2014, nos municípios Restinga Seca Itaqui, RS, onde avaliada variável produtividade grãos. A...
Aiming to find new antibacterial compounds from African medicinal plants, forty extracts of different polarity eight plant species were screened against Gram positive and negative bacteria. The selected Cleistochlamys kirkii, Colophospermum mopane, Cladostemon Chrysophyllum viridifolium, Gardenia ternifolia, Grewia hexamita, Xeroderris stuhlmannii Albizia adianthifolia, are used in Mozambique traditional medicine treat infectious diseases. best results obtained for both apolar polar C....
Despite being relatively high (7.7 t ha -1 ), the average yield of irrigated rice in State Rio Grande Sul (RS) can be even higher, if management practices are carried out at most appropriate time, considering date occurrence main stages plant development (PDS). The objective this article was to demonstrate fundamentals and applications software PlanejArroz estimate six PDS, aiming crop management, expected grain yield. Based on degree-day method, estimates each using historical series (30...
The objectives of the study were estimate additional yield that may be achieved by reducing gap in actual rice area, evaluate if irrigated production meet future demand for without increase area and determine sowing date allows maximum potential. (Yg) was determined difference between potential (Yp) (Ya). Ya obtained from surveys applied to producers. 51% Yp, Yg 49%. In a scenario high demand, yields follow historical rate gain, should not sufficient projected 6% expansion currently...
Plant-derived compounds have long been playing a crucial role in drug discovery and development, representing potential source of new anti-infective agents. It was supposed that the antimicrobial from plants may inhibit bacteria through different mechanisms than conventional antibiotics, could therefore be clinical value treatment resistant microbial strains [1]. Herein, we report evaluation antibacterial activity fourteen medicinal plants, which were collected Mozambique. Seventy crude...
O objetivo deste trabalho foi caracterizar o regime térmico do solo sob três coberturas: gramado, desnudo e coberto com palha, em Santa Maria, RS. Foram utilizados os dados diários de temperatura solo, coletados no período 1970 a 2011, geotermômetros vidro elemento sensível mercúrio às 9h, 15h 21h, nas profundidades 2, 5, 10, 20 30 cm, na Estação Climatológica Principal 8º DISME/INMET/MAPA As estatísticas descritivas foram calculadas nível mensal, sazonal, semestral anual. No média mensal...
Abstract The objective of this work was to evaluate a flooded-rice yield forecasting method for the state Rio Grande do Sul, Brazil, using SimulArroz model. Version 1.1 model and historical meteorological data were used, with six different scenarios composed following levels field information: number sowing dates (1 4) cultivars and/or development cycles 3) during four growing seasons (2014/2015 2017/2018). root mean square error (RMSE) comparing actual simulated Sul 618.3 1,024.8 kg ha−1,...
The genus Zanthoxylum, comprising approximately 250 species, is well known for its ethnobotanical uses among Rutaceae family [1]. Previous studies have demonstrated that plants belonging to this are rich sources of biologically active compounds, such as alkaloids, aliphatic and aromatic amides, coumarins, lignans [2]. Zanthoxylum capense (Thunb.) Harv. a medicinal plant indigenous Zimbabwe, South Africa, Mozambique. Traditional healers use the decoction roots snakebites, root barks treat...
Calycobolus heudelotii (Baker ex Oliv.) Heine is a native plant from West Tropical Africa. Stems are used in folk medicine of Guinea-Bissau for inflammations, skin allergies and wounds [1]. First work previously performed was preliminary botanical analysis the stem [2]. Here we present results an antimicrobial activity study C. methanol extract phytochemical screening. The minimum inhibitory concentration (MIC) determined by broth dilution method against Candida albicans ATCC 10231,...