| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Ruzigrass affecting soil-phosphorus availability
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| Autores: |
Merlin,Alexandre
He,Zhenli Li
Rosolem,Ciro Antonio
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| Data: |
2013-12-01
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| Ano: |
2013
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| Palavras-chave: |
Brachiaria ruziziensis
Urochloa ruziziensis
Cover crops
Crop rotation
P cycling
Phosphorus fractionation
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| Resumo: |
The objective of this work was to evaluate the effectiveness of ruzigrass (Urochloaruziziensis) in enhancing soil-P availability in areas fertilized with soluble or reactive rock phosphates. The area had been cropped for five years under no-till, in a system involving soybean, triticale/black-oat, and pearl millet. Previously to the five-year cultivation period, corrective phosphorus fertilization was applied once on soil surface, at 0.0 and 80 kg ha-1 P2O5, as triple superphosphate or Arad rock phosphate. After this five-year period, plots received the same corrective P fertilization as before and ruzigrass was introduced to the cropping system in the stead of the other cover crops. Soil samples were taken (0-10 cm) after ruzigrass cultivation and subjected to soil-P fractionation. Soybean was grown thereafter without P application to seed furrow. Phosphorus availability in plots with ruzigrass was compared to the ones with spontaneous vegetation for two years. Ruzigrass cultivation increased inorganic (resin-extracted) and organic (NaHCO3) soil P, as well as P concentration in soybean leaves, regardless of the P source. However, soybean yield did not increase significantly due to ruzigrass introduction to the cropping system. Soil-P availability did not differ between soluble and reactive P sources. Ruzigrass increases soil-P availability, especially where corrective P fertilization is performed.
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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=S0100-204X2013001200007
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2013001200007
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.48 n.12 2013
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| Direitos: |
info:eu-repo/semantics/openAccess
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