https://www.socictopen.socict.org/files/original/624f6ba0ce1b31bcc409e85d990e79a1.pdf 801640b040e79e4bc2ca416fe489d5ce Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Agricultura sostenible Description An account of the resource Dominio científico: Agricultura sostenible Text A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Qualidade de alface crespa cultivada em sistema orgânico, convencional e hidropônico Quality of looseleaf lettuce in organic, conventional and hydroponic crop in Rio Branco State, Brazil Creator An entity primarily responsible for making the resource Sebastião Elviro de Araújo Neto, Eliana Mara NCP da Silva, Regina Lúcia F Ferreira, Leonardo B Tavella, Antônio JS Solino Description An account of the resource O objetivo deste trabalho foi avaliar a qualidade da alface do grupo crespa, cv. Vera, em sistemas de cultivo orgânico, convencional e hidropônico em Rio Branco-AC. O experimento foi conduzido em julho de 2009. As amostras dos sistemas, convencional e hidropônico (3 marcas comerciais), foram escolhidas aleatoriamente nos supermercados do município de Rio Branco, no mesmo dia de coleta da alface produzida em sistema orgânico. A alface orgânica, produzida na área experimental do Setor de Agricultura Ecológica da Universidade Federal do Acre (UFAC), em Rio Branco, foi cultivada em estufa, sob plantio direto utilizando folhas de bambu como cobertura do solo, e adubada com composto orgânico (17 t ha-1 em base seca). O delineamento utilizado foi o inteiramente casualizado, com cinco tratamentos e quatro repetições compostas por três plantas. As amostras foram lavadas, cortadas e processadas com folha e caule, para obter o suco. Logo após foram determinados os teores de sólidos solúveis e a concentração de nitrato e ácido ascórbico. As três marcas de alface hidropônica apresentaram maior teor de nitrato e menor concentração de sólidos solúveis e ácidos ascórbico, enquanto a alface orgânica apresentou qualidade superior, com baixa concentração de nitrato e maior teor de ácido ascórbico.The aim of this work was to evaluate the quality of the looseleaf lettuce group, cv. Vera, in organic, conventional and hydroponic crop in Rio Branco, Acre State, North Brazil. The experiment was carried out in July 2009, at the Universidade Federal do Acre. The samples of the conventional and hydroponic (three trademarks) systems were obtained randomly in supermarkets in Rio Branco, in the same day of harvest of the lettuce produced in the organic system. The organic lettuce grown in the experimental area was cultivated in a greenhouse, under no-tillage and mulching of bamboo leaves, and fertilized with organic compost (17 t/ha on a dry base). The experimental design was completely randomized with five treatments and four replications composed of three plants each. The samples were washed, cut and processed, including leaves and stems to obtain the juice and soon after the soluble solids contents and the concentration of nitrate and ascorbic acid were determined. The three trademarks of hydroponic lettuce had higher nitrate content and lower concentration of soluble solids and ascorbic acid, while the organic lettuce had higher quality, with low concentration of nitrate and higher ascorbic acid content. Date A point or period of time associated with an event in the lifecycle of the resource 2011 Subject The topic of the resource Alimento orgânico, Lactuca sativa L, Nitrate, Organic food, nitrato Identifier An unambiguous reference to the resource within a given context 10.1590/S0102-05362011000200019 Source A related resource from which the described resource is derived Horticultura Brasileira Publisher An entity responsible for making the resource available Associação Brasileira de Olericultura Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Plant culture Relation A related resource <a href="http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0102-05362011000200019" target="_blank" rel="noreferrer noopener">http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0102-05362011000200019</a>