| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Green manure incorporation timing for organically grown broccoli
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| Autores: |
Diniz,Ellen Rúbia
Santos,Ricardo Henrique Silva
Urquiaga,Segundo Sacramento
Peternelli,Luiz Alexandre
Barrella,Tatiana Pires
Freitas,Gilberto Bernardo de
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| Data: |
2007-02-01
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| Ano: |
2007
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| Palavras-chave: |
Brassica oleracea
Stizolobium cinereum
Biological nitrogen fixation
Decomposition rate
N recovery
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| Resumo: |
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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000200008
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2007000200008
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.42 n.2 2007
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| Direitos: |
info:eu-repo/semantics/openAccess
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