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Dinâmica da matéria orgânica em agroecossistemas submetidos a queima e manejos dos resíduos culturais
(Universidade Federal de Santa Maria, 2004-07-26)
The use of fire as pasture management has been object of intense argue, although it has many effects in soil and environment quality. In the ground, the most expressive effect occurs on the organic matter (OM), by combustion, ...
Relações entre indicadores de qualidade do solo e a produtividade das culturas em áreas com agricultura de precisão
(Universidade Federal de Santa Maria, 2007-02-16)
The estimative of yield variability is an important tool to soil management decisions and to investigate yield limiting factors. Tools of precision farming as yield mapping and soil sampling using GPS makes possible identify ...
Identificação de fontes de sedimento em bacias hidrográficas rurais do sul do Brasil
(Universidade Federal de Santa Maria, 2015-03-05)
Knowledge of the main diffuse sources of sediment can enhance efficiency in the use of public resources invested in soil conservation management strategies. Conventional fingerprinting methods based on geochemical composition ...
Modelagem da decomposição e emissão de N20 de resíduos culturais com distinta composição química e quantidade
(Universidade Federal de Santa Maria, 2021-07-30)
Simulating the dynamics of carbon (C) and nitrogen (N) and nitrous oxide (N2O) emissions during decomposition of crop residues with distinct chemical composition on the soil surface (mulch) is essential to establish ...
Surface water contamination in southern Brazil by pharmaceutical compounds: application in a high anthropic pressure context
(Universidade Federal de Santa Maria, 2021-07-23)
As aglomerações urbanas de médio porte têm experimentado um enorme crescimento populacional nas últimas décadas. A ausência de um plano diretor e de planejamento ambiental e/ou a falta de controle da ocupação do espaço têm ...
Estratégias para mitigar as emissões de óxido nitroso e aumentar a eficiência de uso do nitrogênio de dejetos líquidos de suínos injetados no solo
(Universidade Federal de Santa Maria, 2021-07-29)
The injection of pig slurry (PS) into the subsurface is an efficient alternative to reduce
N losses via ammonia volatilization. However, this way of using PS enhances the formation of
N2O, the potent greenhouse gas. This ...
Otimização da produção e caracterização química de um bioherbicida produzido por Mycoleptodiscus indicus
(Universidade Federal de Santa Maria, 2021-01-26)
The research and commercial production of bioherbicides in Brazil occur to a lesser extentncompared to biopesticides and biofungicides. The aim of the study was to optimize the production of a bioherbicide by the fungus ...
Emissões de dióxido de carbono durante a implantação de culturas em dois sistemas de preparo em latossolo vermelho do Rio Grande do Sul
(Universidade Federal de Santa Maria, 2011-12-19)
In farming systems with annual crops, the crop establishment period is characterized by intense soil disturbance in conventional tillage (CT) or disturbance only in the sowing line, in case of no-tillage (NT). The soil ...
Destino do carbono de raízes e parte aéreas de culturas de inverno enriquecidas com 13C em solo sob plantio direto
(Universidade Federal de Santa Maria, 2015-09-28)
Little is known about the decomposition and stabilization of shoots and intact roots derived carbon (C)
under no-tillage (no-till) field conditions. The present study was designed with following objectives:
1) evaluation ...
Produção de quitinases e biossurfactantes fúngicos por processos fermentativos
(Universidade Federal de Santa Maria, 2017-05-29)
Brazil's agricultural growth is based on the use of large quantities of synthetic agrochemicals, which result in high production costs and environmental degradation. On the other hand, Brazil harbors the greatest biodiversity ...