Data/hora: 11/06/2024 23:22:49

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 12/05/2016
Data da última atualização: | 12/05/2016
Autoria: | DINIZ, E. R.; SANTOS, R. H. S.; URQUIAGA, S.; PETERNELLI, L. A.; BARRELLA, T. P.; FREITAS, G. B. de.
Afiliação: | ELLEN RUBIA DINIZ, UFV; RICARDO HENRIQUE SILVA SANTOS, UFV; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; LUIZ ALEXANDRE PATERNELLI, UFV; TATIANA PIRES BARRELA, UFV; GILBERTO BERNARDO DE FREITAS, UFV.
Título: | Green manure incorporation timing for organically grown broccoli.
Ano de publicação: | 2007
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília v.42, n. 2, p.199-206, fev. 2007.
DOI: | http://dx.doi.org/10.1590/S0100-204X2007000200008
Idioma: | Inglês
Conteúdo: | The objective of this work was to determine the effect of incorporation timing of the velvet bean (Stizolobium cinereum) (GM) on both organic broccoli yield and N status. Mineral N content in the soil, biologically fixed N recovery by broccoli, GM biomass decomposition and N release kinetics were also determined. Plots were fertilized with 12 Mg ha-1 of organic compost and received GM either at 0, 15, 30 or 45 days after transplant. Other treatments were compost (12 or 25 Mg ha-1), GM, mineral fertilizers and control (no fertilizer). The data were collected in four completely randomized blocks. GM decomposition increased mineral N content in soil as rapidly as mineral fertilizer or the supply of 25 Mg ha-1 of compost. The N half-life in GM (24 days) is smaller than the mass half-life (35 days) and the biological fixation contributed with 23.6% of N present in the aboveground biomass of broccoli. The result suggests a higher synchrony between the crop relative growth rate and N release from the GM when incorporated at crop early growth stage. The incorporation of GM until 15 days after transplanting replaces 50% of the highest compost dose, without yield loss.
Palavras-Chave: | biological nitrogen fixation; Cultivo orgânico; decomposition rate; Fixação biológica do nitrogênio; Mucuna-cinza; N recovery; recuperação de nitrogênio; Stizolobium cinereum; taxa de decomposição.
Thesagro: | Adubação Verde; Brassica Oleracea; Brassica Oleracea Botrytis; Brócolo; Nitrogênio; Produtividade.
Categoria do assunto: | --
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (40215-1) - UPC - SP - PP - 2016.00068 -  - 2016.00068 - DIS