Buscar
Itens para a visualização no momento 1-10 of 31
Desenvolvimento do arroz e do arroz vermelho: modelagem e resposta à mudança climática
(Universidade Federal de Santa Maria, 2008-02-28)
Increases of 1.1 to 6.4°C in temperature are projected by the end of the XXI century in
several locations, including Brazil. Among processes that may be affected by increasing
temperatures is the duration of the developmental ...
Residual da mistura formulada dos herbicidas imazethapyr e imazapic em áreas de arroz sob diferentes manejos de solo
(Universidade Federal de Santa Maria, 2008-04-03)
Red rice (Oryza spp.) is one of the main limiting factors of rice yield (O. sativa L.) in the world and particularly in the Rio Grande do Sul (RS) state Brazil. The Clearfield®
technology is a viable and efficient tool for ...
Doses de nitrogênio, silicatos e fungicidas em cultivar de arroz irrigado sensível à brusone
(Universidade Federal de Santa Maria, 2016-02-29)
Diseases are limiting factors for the expression of the high yield potential of rice cultivars in
the state of Rio Grande do Sul. Blast (Pyricularia oryzae) is considered the main disease,
causing damage to yield and milling ...
Épocas de semeadura, genótipos e programas de controle químico no manejo integrado da brusone na cultura do arroz irrigado
(Universidade Federal de Santa Maria, 2015-02-27)
The blast is the main disease of flooded rice. The integrated management of this disease is based on the adoption of cultural, genetic and chemical strategies of control. The objective of this work was to evaluate the ...
Previsão de safra de arroz no estado do Rio Grande do Sul através de modelagem numérica
(Universidade Federal de Santa Maria, 2015-02-19)
The objective of this study was to define a methodology for monitoring a flooded rice crop forecast for Rio Grande do Sul, and to evaluate the effect of the flood time on growth, development and rice productivity. Two ...
Impacto de agroquímicos usados na lavoura de arroz irrigado sobre a qualidade da água de irrigação e na comunidade zooplanctônica
(Universidade Federal de Santa Maria, 2010-02-26)
Agrochemicals are intensely used on rice (Orysa sativa L.) paddy culture, and depending on their environmental persistence and toxicity they may contaminate water bodies and affect non-target organisms. Both herbicides and ...
Época de semeadura de arroz irrigado: rendimento de grãos, controle de arroz-vermelho, eficiência no uso da água e estresse oxidativo
(Universidade Federal de Santa Maria, 2013-02-26)
Irrigated rice is highly influenced by weather, as it is by air temperature and solar radiation.
Thus, the study aimed to evaluate the effect of sowing dates on grain yield and in water use,
as well as in red rice, main ...
Dinâmica do nitrogênio mineral e produtividade do arroz irrigado na sucessão soja-azevém em solo de várzea
(Universidade Federal de Santa Maria, 2011-08-31)
The current recommendation of nitrogen fertilizer for irrigated rice (Oryza sativa) depends
on the content of soil organic matter and expectation of response to N application; it can be
influenced by previous crops. This ...
Cianobactérias heterocitadas e euglenas vermelhas em lavoura de arroz irrigado por inundação em planossolo háplico, Santa Maria, RS
(Universidade Federal de Santa Maria, 2010-08-30)
Oxyreduction reactions resulting from the soil flood promote lighest availability of nutrients from fertilizer application, soil solution. Although the management of drainage, necessary to improve plant establishment ...
Dinâmica do arsênio no sistema solo - água - arroz na América do Sul: distinções fisiológicas entre cultivares e ocorrência em grãos comerciais
(Universidade Federal de Santa Maria, 2016-02-29)
Rice is the main source of inorganic arsenic (Asi), a carcinogenic substance, in the human diet. In this sense, there is great interest in reducing the accumulation of As in rice grains. To achive this, field management / ...