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Provedor de dados:  Rev. Bras. Ciênc. Solo
País:  Brazil
Título:  Year-round poultry litter decomposition and N, P, K and Ca release
Autores:  Pitta,Christiano Santos Rocha
Adami,Paulo Fernando
Assmann,Tangriani Simioni
Franchin,Marcia Fernanda
Cassol,Luís César
Sartor,Laércio Ricardo
Data:  2012-06-01
Ano:  2012
Palavras-chave:  Litter bag
Filed incubation
Organic fertilizer
Residual contents
Resumo:  Poultry litter is an important nutrient source in agriculture, although little information is available regarding its decomposition rate and nutrient release. To evaluate these processes, poultry litter (PL) was applied to the soil to supply 100, 200 and 300 kg ha-1 N contained in 4,953, 9,907 and 14,860 kg ha-1 PL, respectively. The litter bag technique was used to monitor the process of decomposition and nutrient release from the litter. These bags were left on the soil surface and collected periodically (after 15, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, and 365 days). The dry matter (DM) loss was highest (35 %) after the first 30 days of field incubation. The highest nutrient release occurred in the first 60 days on the field, when 40, 34, 91, and 39 %, respectively, of N, P, K, and Ca of the initial PL dry matter (4,860 kg ha-1) was already released to the soil. In absolute terms, these percentages represent 40, 23, 134, and 69 kg ha-1 of N, P, K, and Ca and these values doubled and tripled as the PL fertilization rates increased to 9,907 and 14,860 kg ha-1, respectively. After one year of field incubation, the residual contents in the litter were 27, 15, 18 and 30 % of the initial DM , and N, P and Ca, respectively. The release rate of K was the fastest and 91 % of the K had been released from the PL after 30 days of field incubation.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Ciência do Solo
Relação:  10.1590/S0100-06832012000300034
Formato:  text/html
Fonte:  Revista Brasileira de Ciência do Solo v.36 n.3 2012
Direitos:  info:eu-repo/semantics/openAccess

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