https://www.socictopen.socict.org/files/original/5ddaad14b71bd6aa15978e5cd996f614.pdf b9fc8b1bc1770c9100f296c12f8eedfc 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 Aproveitamento da macrófita aquática Egeria densa como adubo orgânico Use of aquatic plant (Egeria densa) as an organic fertilizer Creator An entity primarily responsible for making the resource E.V.S.B. Sampaio, N.M.B. Oliveira Description An account of the resource Grandes massas de Egeria densa são retiradas dos lagos do sistema hidrelétrico de Paulo Afonso e seu descarte tem sido problemático. O aproveitamento como adubo orgânico foi comparado com o de esterco, em plantio de milho, irrigado, a campo. Foram comparadas as doses de 20 e 40 t ha-1 de matéria seca com testemunha, sem adubo. Paralelamente, foi acompanhada a decomposição do material incorporado ao solo. A massa de E. densa decompôs-se rapidamente, restando menos de um terço após um mês e menos de 1% após dois meses. As adubações com E. densa e esterco incorporaram grande quantidade de nutrientes ao solo e resultaram em produção de grãos de milho (3,5 a 8,5 t ha-1) e palha (4,3 a 8,8 t ha-1) muito maior que a da testemunha (0,3 e 1,2 t ha-1). Em média, as produções com E. densa (grãos, 7,7 t ha-1) foram maiores que as com esterco (4,2 t ha-1), sem diferenças significativas entre doses, possivelmente porque a massa de E. densa libera nutrientes mais rapidamente. Os teores de metais pesados e outros elementos de E. densa ficaram dentro da faixa permitida para adubos orgânicos e não afetaram o milho. O aproveitamento como adubo orgânico parece recomendável.The removal of large masses of Egeria densa out of the lakes of Paulo Afonso hydroelectric plant complex has been problematic. Their use as organic fertilizer was compared to that of cattle manure, in an irrigated corn field. Doses of 20 and 40 t ha-1 of dry matter were compared to a control, without fertilizer. Simultaneously, decomposition of the material in the soil was monitored. The E. densa mass decomposed rapidly, with less than a third remaining after one month and less than 1% after two months. Incorporations with both E. densa and manure added large quantities of nutrients to the soil and resulted in larger grain (3.5 to 8.5 t ha-1) and straw (4.3 to 8.8 t ha-1) productions than those of the control (0.3 and 1.2 t ha-1). Productions with E. densa (grain, 7.7 t ha-1), on average, were higher than those with manure (4.2 t ha-1), without significant difference between doses, probably because the mass of E. densa releases nutrients faster than that of manure. The content of heavy metals and other elements in the mass of E. densa were within the range approved for organic fertilizers and did not affect the corn plants. Using the masses of E. densa as organic fertilizer appears to be a recommendable practice. Date A point or period of time associated with an event in the lifecycle of the resource 2005 Subject The topic of the resource Nutrientes, aquatic plant, corn, fertilizante orgânico, milho, nutrients, organic fertilizer, planta aquática, planta daninha, weed Identifier An unambiguous reference to the resource within a given context 10.1590/S0100-83582005000200001 Source A related resource from which the described resource is derived Planta Daninha Publisher An entity responsible for making the resource available Sociedade Brasileira da Ciência das Plantas Daninhas Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Biology (General), Botany Relation A related resource <a href="http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0100-83582005000200001" target="_blank" rel="noreferrer noopener">http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0100-83582005000200001</a>