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| Merlin,Alexandre; He,Zhenli Li; Rosolem,Ciro Antonio. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria ruziziensis; Urochloa ruziziensis; Cover crops; Crop rotation; P cycling; Phosphorus fractionation. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001200007 |
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| Oliveira,Rodolfo Assis de; Comin,Jucinei José; Tiecher,Tales; Piccin,Rogério; Somavilla,Luiza Michelon; Loss,Arcângelo; Lourenzi,Cledimar Rogério; Kürtz,Claudinei; Brunetto,Gustavo. |
| ABSTRACT Cover crops grown alone or in association can take up different amounts of phosphorus (P) from the soil and accumulate it in different P-forms in plant tissue. Cover crop residues with a higher content of readily decomposed forms may release P more quickly for the next onion crop. The aim of this study was to evaluate the release of P forms from residues of single and mixed cover crops in agroecological no-till onion (Allium cepa L.) production. The experiment was conducted in Ituporanga, Santa Catarina (SC), Brazil, in an Inceptisol, with the following treatments: weeds, black oat (Avena sativa L.), rye (Secale cereale L.), oilseed radish (Raphanus sativus L.), oilseed radish + black oat, and oilseed radish + rye. Cover crops were sown in April... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Green manure crops; P cycling; Allium cepa L. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100502 |
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| Costa,Adriana Rodolfo da; Sato,Juliana Hiromi; Ramos,Maria Lucrécia Gerosa; Figueiredo,Cícero Célio de; Souza,Géssica Pereira de; Rocha,Omar Cruz; Guerra,Antônio Fernando. |
| Phosphorus fertilization and irrigation increase coffee production, but little is known about the effect of these practices on soil organic matter and soil microbiota in the Cerrado. The objective of this study was to evaluate the microbiological and oxidizable organic carbon fractions of a dystrophic Red Latossol under coffee and split phosphorus (P) applications and different irrigation regimes. The experiment was arranged in a randomized block design in a 3 x 2 factorial design with three split P applications (P1: 300 kg ha-1 P2O5, recommended for the crop year, of which two thirds were applied in September and the third part in December; P2: 600 kg ha-1 P2O5, applied at planting and then every two years, and P3: 1,800 kg ha-1 P2O5, the requirement for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P cycling; Soil microbial activity; Acid phosphatase; Soil organic matter. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100006 |
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