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| Souza,Géssica Pereira de; Figueiredo,Cícero Célio de; Sousa,Djalma Martinhão Gomes de. |
| Abstract The objective of this work was to evaluate the effects of soil management systems, cover crops, and phosphate fertilization on soil humic fractions in a long-term experiment. The treatments consisted of conventional tillage and no-tillage with pearl millet (Pennisetum glaucum) or velvet bean (Mucuna aterrima) as cover crops, at two doses of phosphorous: 0 and 100 kg ha-1 P2O5 per year. Soil samples were taken 11 years after the establishment of the experiment and analyzed for soil total organic carbon and carbon content of humic fractions at 0.00-0.05, 0.05-0.10, and 0.10-0.20-m depths. The humic fractions are sensitive to soil management, except free fulvic acid, which was the only one that did not reduce its carbon contents on the surface layer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humic fractions; No-tillage; Organic matter fractions; Phosphate fertilization; Soil fertility; Soil quality. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901668 |
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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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