Data/hora: 11/06/2024 07:55:48

Provedor de dados: | 63
País: | Brazil
Título: | Perennial herbaceous legumes as live soil mulches and their effects on C, N and P of the microbial biomass
Autores: | Duda,Gustavo Pereira; Guerra,José Guilherme Marinho; Monteiro,Marcela Teixeira; De-Polli,Helvécio; Teixeira,Marcelo Grandi.
Data: | 2003-02-01
Ano: | 2003
Palavras-chave: | Microbial phosphorus; Manure green; Nutrients cycling.
Resumo: | The use of living mulch with legumes is increasing but the impact of this management technique on the soil microbial pool is not well known. In this work, the effect of different live mulches was evaluated in relation to the C, N and P pools of the microbial biomass, in a Typic Alfisol of Seropédica, RJ, Brazil. The field experiment was divided in two parts: the first, consisted of treatments set in a 2 x 2 x 4 factorial combination of the following factors: live mulch species (Arachis pintoi and Macroptilium atropurpureum), vegetation management after cutting (leaving residue as a mulch or residue remotion from the plots) and four soil depths. The second part had treatments set in a 4 x 2 x 2 factorial combination of the following factors: absence of live mulch, A. pintoi, Pueraria phaseoloides, and M. atropurpureum, P levels (0 and 88 kg ha-1) and vegetation management after cutting. Variation of microbial C was not observed in relation to soil depth. However, the amount of microbial P and N, water soluble C, available C, and mineralizable C decreased with soil depth. Among the tested legumes, Arachis pintoi promoted an increase of microbial C and available C content of the soil, when compared to the other legume species (Pueraria phaseoloides and Macroptilium atropurpureum). Keeping the shoot as a mulch promoted an increase on soil content of microbial C and N, total organic C and N, and organic C fractions, indicating the importance of this practice to improve soil fertility.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100021
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162003000100021
Formato: | text/html
Fonte: | Scientia Agricola  v.60 n.1 2003
Fonte: | info:eu-repo/semantics/openAccess