Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-10-25T22:17:09Z
No. of bitstreams: 1
IaneMaiaraSoaresDeSouza_DISSERT.pdf: 4470838 bytes, checksum: 2d0cefa510064efd5cd302fd5185c11c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-12-16T17:16:18Z (GMT) No. of bitstreams: 1
IaneMaiaraSoaresDeSouza_DISSERT.pdf: 4470838 bytes, checksum: 2d0cefa510064efd5cd302fd5185c11c (MD5) / Made available in DSpace on 2016-12-16T17:16:18Z (GMT). No. of bitstreams: 1
IaneMaiaraSoaresDeSouza_DISSERT.pdf: 4470838 bytes, checksum: 2d0cefa510064efd5cd302fd5185c11c (MD5)
Previous issue date: 2016-03-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O nitrog?nio ? um macronutriente fundamental para o crescimento vegetal. Atualmente, devido os desgastes ao longo dos anos e a elevada demanda na produ??o de alimentos, o solo n?o consegue fornecer ?s plantas o nitrog?nio necess?rio para seu crescimento. Por isso, o uso de fertilizantes nitrogenados ? amplamente aplicado na agricultura, onde a ureia, por possuir elevado teor de nitrog?nio, ? o mais usado. Contudo, suas elevadas perdas acarretadas principalmente por volatiliza??o de am?nia e lixivia??o de nitrato fazem com que seja necess?rio o desenvolvimento de sistemas que reduzam a velocidade de hidr?lise da ureia. Neste trabalho foram desenvolvidos dois tipos de fertilizante a base de ureia e carreadores, um em que a ureia foi misturada com bentonita e outro onde a ureia foi misturada com a clinoptilolta, onde para cada argilomineral foram formulados tr?s tipos de fertilizantes, variando as propor??es carreador:ureia na forma: 1:4, 1:8 e 1:16. Ainda foi formulado um terceiro fertilizante constitu?do somente de ureia triturada e misturada com os aditivos utilizados nas formula??es como talco e solu??o de PVP. Todas as composi??es propostas foram compactadas em cilindros com di?metro de 7mm e altura de 4mm. Os fertilizantes foram caraterizados quanto a sua morfologia, an?lise qu?mica e mineralogia pelas t?cnicas de FRX, DRX, FTIR, TG/DSC e MEV. A efici?ncia agron?mica foi avaliada quanto as perdas de volatilizado, atingindo uma redu??o de 53% para Z1U16. / Nitrogen is an essential macronutrient for growth of plant. Currently, due to the wear and tear over the years and the high demand for food production, the soil cannot provide the necessary nitrogen for plant?s growth. Therefore, the use of nitrogen fertilizer is widely used in agriculture, where urea, due high nitrogen content, is the most used. However, their high losses caused mainly by volatilization of ammonia and nitrate leaching cause the development of systems that reduce the rate of urea. In this study we developed two types of fertilizer urea base and carriers, one in which the urea was mixed with bentonite and another where the urea was mixed with clinoptilolite where for each clay mineral were made three types of fertilizer, by varying the carrier ratios:urea: 1:4, 1:8 and 1:16. Still a third fertilizer was formulated consisting of crushed urea only and mixed with the additives used in formulations such as talc and PVP. All proposals compositions were compressed into cylinders with a diameter of 7 mm and 4 mm in height. The fertilizers were characterized as their morphology, chemistry and mineralogy analysis by XRF techniques, XRD, FTIR, TG / DSC and SEM. The agronomic efficiency was assessed as the loss of ???3 by evaporation in humidity and temperature controlled in a greenhouse, using a layer with a depth of 0-20cm a Planosol Haplic and trays as experimental units. Losses were evaluated using static-free semi-open cameras (SALE). They were evaluated dosages equivalent to 100 and 200kg.ha-1, with three replicates for each, and a completely randomized design. The formulated fertilizer showed good capacity storage, where exposed to the atmosphere do not agglomerate. The characterizations show that there were no chemical interactions between the constituents of fertilizers. As for agronomic evaluation showed that formulations used bentonite showed no significant reductions in the losses by volatilization as compared with conventional urea. The formulations used the clinoptilolite as carrier showed considerable reductions in the amount of ???3 volatilized, reaching a reduction of 53% to Z1U16.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21470 |
| Date | 09 March 2016 |
| Creators | Souza, Iane Maiara Soares de |
| Contributors | 27816279841, Zonta, Everaldo, 58544402968, Ruiz, Juan Alberto Chavez, 00744293456, Paskocimas, Carlos Alberto, Delmonte, Maur?cio Roberto Bomio |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0025 seconds