Data/hora: 20/06/2024 22:58:03

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 14/04/2014
Data da última atualização: | 10/07/2017
Autoria: | MERLIN, A.; HE, Z. L.; ROSOLEM, C. A.
Afiliação: | Alexandre Merlin, Universidade Estadual Paulista, Departamento de Fitotecni; Zhenli Li He, University of Florida, IFAS; Ciro Antonio Rosolem, Universidade Estadual Paulista, Departamento de Fitotecni.
Título: | Ruzigrass affecting soil-phosphorus availability.
Ano de publicação: | 2013
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 12, p. 1583-1588, dez. 2013.
Idioma: | Inglês
Notas: | Título em português: Efeito da braquiária sobre a disponibilidade de fósforo no solo.
Conteúdo: | The objective of this work was to evaluate the effectiveness of ruzigrass (Urochloa ruziziensis) in enhancing soil&#8209;P availability in areas fertilized with soluble or reactive rock phosphates. The area had been cropped for five years under no&#8209;till, in a system involving soybean, triticale/black&#8209;oat, and pearl millet. Previously to the five&#8209;year cultivation period, corrective phosphorus fertilization was applied once on soil surface, at 0.0 n , as triple superphosphate or Arad rock phosphate. After this five&#8209;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?10cm) after ruzigrass cultivation and subjected to soil&#8209;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&#8209;extracted) and organic (NaHCO 3 ) 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&#8209;P availability did not differ between soluble and reactive P sources. Ruzigrass increases soil&#8209;P availability, especially where corrective P fertilization is performed.
Palavras-Chave: | Cultivo de cobertura; Fracionamento de fósforo; Phosphorus fractionation.
Thesagro: | Brachiaria Ruziziensis; Rotação de cultura.
Thesaurus Nal: | Cover crops; Crop rotation; Urochloa ruziziensis.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/101043/1/Ruzigrass-affecting.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (56002-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS