Organic fertilization and straw maintenance in sugarcane: effects on ammonia volatilization, chemical and physical parameters of the soil and productivity

Autor: ALVES, André da Silva
Přispěvatelé: SHIGAKI, Francirose, RODRIGUES, Rosane Cláudia, PEREIRA, Marcos Gervásio, ZANINE, Anderson de Moura
Jazyk: portugalština
Rok vydání: 2020
Předmět:
Zdroj: Biblioteca Digital de Teses e Dissertações da UFMA
Universidade Federal do Maranhão (UFMA)
instacron:UFMA
Popis: Submitted by Sheila MONTEIRO (sheila.monteiro@ufma.br) on 2021-04-15T13:53:10Z No. of bitstreams: 1 ANDRE-ALVES.pdf: 969820 bytes, checksum: 4e886d31faa93834b67da87c0ea6d7cb (MD5) Made available in DSpace on 2021-04-15T13:53:10Z (GMT). No. of bitstreams: 1 ANDRE-ALVES.pdf: 969820 bytes, checksum: 4e886d31faa93834b67da87c0ea6d7cb (MD5) Previous issue date: 2020-02-29 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão - FAPEMA Objective: to evaluate how to reduce N by ammonia volatilization system, such as changes in the physical and chemical attributes of the soil promoted by the use of organic fertilizer, degradation of the palette in the soil and research of the sugarcane culture. For this, two experimental years were imposed. In the first year, sugarcane crops (RB 92579, RB 867515 and RB 863129) were evaluated, where RB 867515 performed better and was selected for the second experimental year. As nitrogen sources applied were liquid manure (DS), chicken litter (CF), urea (URE), coated urea (URE R), and control treatment (CON) where there was no fertilizer application. After the application of organic and mineral sources of N, chemical and physical substances of the soil were applied, in the depths (0-5, 5-10 and 10-20 cm), being these: pH, Ca, Mg, K, Al, H + Al, P, COT, total density and total porosity. Palette decomposition and nitrogen losses due to ammonia volatilization were also quantified. In general terms, if organic nitrogen sources demonstrate beneficial effects on soil chemicals, where DS will provide no pH value, and comparisons with a CF will provide records on COT levels. reduction in density and increase in the amount of soil pores. For the results of ammonia volatilization, as organic sources demonstrated as lower volatilization rates with average values of 3.4 kg ha-1, being 70% less than the values found for the N analysis by volatilization when the mineral nitrogen sources have been applied. As for a straw decomposition, as organic sources demonstrated significant effect (p
Databáze: OpenAIRE
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