Data/hora: 18/06/2024 13:52:58

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Solos.
Data corrente: | 05/12/2017
Data da última atualização: | 11/11/2021
Autoria: | SANTOS, F. M.; BALIEIRO, F. de C.; MARCELO ANTONIOL FONTES; CHAER, G. M.
Afiliação: | FELIPE MARTINI SANTOS, UFRRJ; FABIANO DE CARVALHO BALIEIRO, CNPS; MARCELO ANTONIOL FONTES, CNPAB; GUILHERME MONTANDON CHAER, CNPAB.
Título: | Understanding the enhanced litter decomposition of mixed-species plantations of Eucalyptus and Acacia mangium.
Ano de publicação: | 2018
Fonte/Imprenta: | Plant and Soil, v. 423, n. 1/2, p. 141-155, Feb. 2018.
DOI: | https://doi.org/10.1007/s11104-017-3491-7
Idioma: | Inglês
Conteúdo: | Background and aims Soil microbial-derived litter decomposition represents an important step in the global carbon and nutrient cycling and, at the local level, is primarily driven by litter chemistry. Here, we assessed how mixed-species plantations with Eucalyptus urograndis and Acacia mangium could be a key to enhancing litter production, decomposition, and soil microbial activity. Methods The relationships between litter decomposition and litter quality and quantity were compared among 6-year-old monocultures of E. urograndis and A. mangium (E100+N and A100, respectively) and a mixed plantation of both species (E50A50). Additionally, we evaluated soil microbial biomass carbon (MBC) and nitrogen (MBN), soil basal respiration (SBR), soil enzymes and the N mineralization potential. Results The return to soil of N via litterfall in E50A50 was greater than E100+N, while the return of P in E100+N and E50A50 were higher than A100. The decomposition rate in A100 was slower than in the E50A50 and E100+N. The microbial activity, represented by soil enzyme activities (proteases and N-acetyl-B- glucosaminidases), was consistently higher in E50A50 than in A100. Conclusion The E50A50 presented a more balanced supply ofN and P associated to a better structural quality of the litter for microbial metabolism, with synergic reflections on decomposition rates and release of nitrogen.
Palavras-Chave: | Árvores fixadoras de nitrogênio; Decomposer starvation; N P stoichiometry; Nutrient cycling.
Thesagro: | Atividade Enzimática; Nutriente.
Thesaurus Nal: | Enzyme activity; Intercropping.

Categoria do assunto:

P Recursos Naturais, Ciências Ambientais e da Terra
S Ciências Biológicas

Registro original: | Embrapa Solos (CNPS)

Exemplares:

CNPS - (19726-1) - UPC - AP - DD -  -  - 2017.00286 - DIS
CNPAB - (40738-1) - UPC - AP - DD - 2018.00028 -  - 2018.00028 - DIS