| spelling |
2023-04-20T13:29:16Z2023-04-20T13:29:16Z2021-09-241012e372101220621https://doi.org/10.33448/rsd-v10i12.206212525-3409http://hdl.handle.net/1843/52307O uso da ureia como fertilizante implica em elevadas perdas de N-NH3. Essas perdas comprometem a sustentabilidade da adubação nitrogenada em sistemas intensivos de produção de forragem, mesmo em áreas irrigadas de regiões tropicais. Assim, é primordial a adoção de práticas de manejo que favoreçam a eficiência de utilização do N-ureia pelas plantas. Portanto, avaliou-se a aplicação de doses de ureia associada ou não ao inibidor de urease NBPT® sobre as perdas de N-NH3do solo por volatilização, a produtividade e a eficiência de uso do N na Tithonia diversifoliaem cultivo irrigado. Utilizou-se o delineamento em bloco casualizados, com quatro repetições, em esquema fatorial 2 x 5, sendo o primeiro fator a ureia associada ou não com o inibidor de urease NBPT®, e o segundo representado pelas doses de 0,50, 100,150 e 200 kg ha-1de N. As maiores perdas de N-NH3no solo foram observadas no 6º dia após aplicação, nos tratamentos sem inibidor de urease e nas maiores doses de ureia. A utilização de NBPT® reduziu a perda de N-NH3 no solo a menos de 5% das doses aplicadas. O NBPT® em mistura a ureia aumenta a eficiência agronômica do uso do N e a produtividade pela T. diversifolia em comparação ao uso do fertilizante sem esse inibidor. A eficiência do uso do nutriente aplicado possui comportamento inverso ao aumento da dose de N aplicada, sendo o melhor custo benefício referente a produtividade da forrageira (12.000 kg ha-1de massa seca) obtido com a aplicação 50 kg ha-1de N com NBPT®.The use of urea as a fertilizer implies high N-NH3 losses. These losses compromise the sustainability of nitrogen fertilization in intensive forage production systems, even in irrigated areas in tropical regions. Thus, it is essential to adopt management practices that favor the efficiency of the use of N-urea by plants. Therefore, it was evaluated the application of urea doses associated or not with the urease inhibitor NBPT® on soil NH3-N losses by volatilization, productivity, and N use efficiency in Tithonia diversifolia in irrigated cultivation. A randomized block design was used, with four replications, in a 2 x 5 factorial scheme, the first factor being urea associated or not with the urease inhibitor NBPT®, and the second represented by doses of 0, 50, 100, 150 and 200 kg ha-1 of N. The greatest losses of N-NH3 in the soil were observed on the 6th day after application, in treatments without urease inhibitor and in the highest doses of urea. The use of NBPT® reduced the loss of N-NH3 in the soil to less than 5% of the applied doses. NBPT® mixed with urea increases the agronomic efficiency of N use and productivity by T. diversifolia compared to the use of fertilizer without this inhibitor. The efficiency of the use of the applied nutrient has an inverse behavior to the increase of the applied N dose, being the best cost-benefit referring to the forage productivity (12,000 kg ha-1 of dry mass) obtained with the application of 50 kg ha-1 of N with NBPT®.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisporUniversidade Federal de Minas GeraisUFMGBrasilICA - INSTITUTO DE CIÊNCIAS AGRÁRIASResearch, Society and DevelopmentGirassolAdubaçãoIrrigação agrícolaUréia como fertilizanteFertilizantes nitrogenadosN (n-butyl) thiophosphoricotriamideAgronomic efficiencyTithonia diversifoliaEficiência da adubação nitrogenada associada ao inibidor de urease no cultivo de girassol-mexicano irrigadoEfficiency of nitrogen fertilization associated with urease inhibitor in irrigated mexican sunflower cultivationEficiencia de la fertilización nitrogenada asociada al inhibidor de la ureasa en el cultivo de girasol mexicano con regadioinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://rsdjournal.org/index.php/rsd/article/view/20621Eden Eduardo Alves RibeiroLuan Mateus Silva DonatoVictor Diniz MachadoRodinei Facco PegoraroRodrigo Eduardo BarrosJatnel Alonso LazoLeonardo David Tuffi Santosinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/52307/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINALEficiência da adubação nitrogenada associada ao inibidor de urease no cultivo de girassol-mexicano irrigado.pdfEficiência da adubação nitrogenada associada ao inibidor de urease no cultivo de girassol-mexicano irrigado.pdfapplication/pdf278102https://repositorio.ufmg.br/bitstream/1843/52307/2/Efici%c3%aancia%20da%20aduba%c3%a7%c3%a3o%20nitrogenada%20associada%20ao%20inibidor%20de%20urease%20no%20cultivo%20de%20girassol-mexicano%20irrigado.pdf123d8630c22042b787d958529f36607aMD521843/523072023-04-20 17:41:48.158oai:repositorio.ufmg.br:1843/52307TElDRU7vv71BIERFIERJU1RSSUJVSe+/ve+/vU8gTu+/vU8tRVhDTFVTSVZBIERPIFJFUE9TSVTvv71SSU8gSU5TVElUVUNJT05BTCBEQSBVRk1HCiAKCkNvbSBhIGFwcmVzZW50Ye+/ve+/vW8gZGVzdGEgbGljZW7vv71hLCB2b2Pvv70gKG8gYXV0b3IgKGVzKSBvdSBvIHRpdHVsYXIgZG9zIGRpcmVpdG9zIGRlIGF1dG9yKSBjb25jZWRlIGFvIFJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRk1HIChSSS1VRk1HKSBvIGRpcmVpdG8gbu+/vW8gZXhjbHVzaXZvIGUgaXJyZXZvZ++/vXZlbCBkZSByZXByb2R1emlyIGUvb3UgZGlzdHJpYnVpciBhIHN1YSBwdWJsaWNh77+977+9byAoaW5jbHVpbmRvIG8gcmVzdW1vKSBwb3IgdG9kbyBvIG11bmRvIG5vIGZvcm1hdG8gaW1wcmVzc28gZSBlbGV0cu+/vW5pY28gZSBlbSBxdWFscXVlciBtZWlvLCBpbmNsdWluZG8gb3MgZm9ybWF0b3Mg77+9dWRpbyBvdSB277+9ZGVvLgoKVm9j77+9IGRlY2xhcmEgcXVlIGNvbmhlY2UgYSBwb2zvv710aWNhIGRlIGNvcHlyaWdodCBkYSBlZGl0b3JhIGRvIHNldSBkb2N1bWVudG8gZSBxdWUgY29uaGVjZSBlIGFjZWl0YSBhcyBEaXJldHJpemVzIGRvIFJJLVVGTUcuCgpWb2Pvv70gY29uY29yZGEgcXVlIG8gUmVwb3NpdO+/vXJpbyBJbnN0aXR1Y2lvbmFsIGRhIFVGTUcgcG9kZSwgc2VtIGFsdGVyYXIgbyBjb250Ze+/vWRvLCB0cmFuc3BvciBhIHN1YSBwdWJsaWNh77+977+9byBwYXJhIHF1YWxxdWVyIG1laW8gb3UgZm9ybWF0byBwYXJhIGZpbnMgZGUgcHJlc2VydmHvv73vv71vLgoKVm9j77+9IHRhbWLvv71tIGNvbmNvcmRhIHF1ZSBvIFJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRk1HIHBvZGUgbWFudGVyIG1haXMgZGUgdW1hIGPvv71waWEgZGUgc3VhIHB1YmxpY2Hvv73vv71vIHBhcmEgZmlucyBkZSBzZWd1cmFu77+9YSwgYmFjay11cCBlIHByZXNlcnZh77+977+9by4KClZvY++/vSBkZWNsYXJhIHF1ZSBhIHN1YSBwdWJsaWNh77+977+9byDvv70gb3JpZ2luYWwgZSBxdWUgdm9j77+9IHRlbSBvIHBvZGVyIGRlIGNvbmNlZGVyIG9zIGRpcmVpdG9zIGNvbnRpZG9zIG5lc3RhIGxpY2Vu77+9YS4gVm9j77+9IHRhbWLvv71tIGRlY2xhcmEgcXVlIG8gZGVw77+9c2l0byBkZSBzdWEgcHVibGljYe+/ve+/vW8gbu+/vW8sIHF1ZSBzZWphIGRlIHNldSBjb25oZWNpbWVudG8sIGluZnJpbmdlIGRpcmVpdG9zIGF1dG9yYWlzIGRlIG5pbmd177+9bS4KCkNhc28gYSBzdWEgcHVibGljYe+/ve+/vW8gY29udGVuaGEgbWF0ZXJpYWwgcXVlIHZvY++/vSBu77+9byBwb3NzdWkgYSB0aXR1bGFyaWRhZGUgZG9zIGRpcmVpdG9zIGF1dG9yYWlzLCB2b2Pvv70gZGVjbGFyYSBxdWUgb2J0ZXZlIGEgcGVybWlzc++/vW8gaXJyZXN0cml0YSBkbyBkZXRlbnRvciBkb3MgZGlyZWl0b3MgYXV0b3JhaXMgcGFyYSBjb25jZWRlciBhbyBSZXBvc2l077+9cmlvIEluc3RpdHVjaW9uYWwgZGEgVUZNRyBvcyBkaXJlaXRvcyBhcHJlc2VudGFkb3MgbmVzdGEgbGljZW7vv71hLCBlIHF1ZSBlc3NlIG1hdGVyaWFsIGRlIHByb3ByaWVkYWRlIGRlIHRlcmNlaXJvcyBlc3Tvv70gY2xhcmFtZW50ZSBpZGVudGlmaWNhZG8gZSByZWNvbmhlY2lkbyBubyB0ZXh0byBvdSBubyBjb250Ze+/vWRvIGRhIHB1YmxpY2Hvv73vv71vIG9yYSBkZXBvc2l0YWRhLgoKQ0FTTyBBIFBVQkxJQ0Hvv73vv71PIE9SQSBERVBPU0lUQURBIFRFTkhBIFNJRE8gUkVTVUxUQURPIERFIFVNIFBBVFJPQ++/vU5JTyBPVSBBUE9JTyBERSBVTUEgQUfvv71OQ0lBIERFIEZPTUVOVE8gT1UgT1VUUk8gT1JHQU5JU01PLCBWT0Pvv70gREVDTEFSQSBRVUUgUkVTUEVJVE9VIFRPRE9TIEUgUVVBSVNRVUVSIERJUkVJVE9TIERFIFJFVklT77+9TyBDT01PIFRBTULvv71NIEFTIERFTUFJUyBPQlJJR0Hvv73vv71FUyBFWElHSURBUyBQT1IgQ09OVFJBVE8gT1UgQUNPUkRPLgoKTyBSZXBvc2l077+9cmlvIEluc3RpdHVjaW9uYWwgZGEgVUZNRyBzZSBjb21wcm9tZXRlIGEgaWRlbnRpZmljYXIgY2xhcmFtZW50ZSBvIHNldSBub21lKHMpIG91IG8ocykgbm9tZXMocykgZG8ocykgZGV0ZW50b3IoZXMpIGRvcyBkaXJlaXRvcyBhdXRvcmFpcyBkYSBwdWJsaWNh77+977+9bywgZSBu77+9byBmYXLvv70gcXVhbHF1ZXIgYWx0ZXJh77+977+9bywgYWzvv71tIGRhcXVlbGFzIGNvbmNlZGlkYXMgcG9yIGVzdGEgbGljZW7vv71hLgo=Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-04-20T20:41:48Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
|