2004
DOI: 10.1590/s0102-05362004000300004
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Produção da alface em função do uso de diferentes fontes de fósforo em solo de Cerrado

Abstract: O s solos sob vegetação de cerrado, principalmente os latossolos, apresentam limitações de ordem química para o adequado crescimento das plantas, com destaque para os baixos teores de nutrientes e a elevada capacidade de adsorção de fosfato. A baixa eficiência das adubações fosfatadas evidencia a necessidade de novos métodos de adubação no que diz respeito a fontes, épo-cas de aplicação e localização do adubo (Guimarães et al., 1993). Em solos áci-dos e com baixos teores de fósforo, este nutriente limita a pro… Show more

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Cited by 33 publications
(27 citation statements)
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“…Although Mg is not supplied through the fertilizations, the synergetic interaction of applied P x soil Mg favors the absorption of both (Lana et al, 2004). For the other spacings, S 2 and S 3 , the means were similar as a function of the fertilizations.…”
Section: Resultsmentioning
confidence: 88%
“…Although Mg is not supplied through the fertilizations, the synergetic interaction of applied P x soil Mg favors the absorption of both (Lana et al, 2004). For the other spacings, S 2 and S 3 , the means were similar as a function of the fertilizations.…”
Section: Resultsmentioning
confidence: 88%
“…In an experiment done by MOTA et al (2001) with potassium in americana lettuce, the authors discovered that smaller doses can be more efficient in relation to greater head circumferences, and that higher doses appear to be less efficient even in relation to the control, this result, according to the authors, is due to the fact of higher doses proportionate a nutritional imbalance, in which the excess of potassium impaired the absorption of other elements, such as calcium and magnesium, resulting in a smaller plants development. LANA et al (2004), in an experiment done with sources of phosphorus, obtained the greatest results for lettuce diameter with the sources which provided a greater concentration of phosphorus in the leaves and in the soil. With this in sight, it is noted that an adequate balance of nutrients on the soil contributes for a greater root growth, capable of absorbing more nutrients, causing a higher growth of the aerial part.…”
Section: Resultsmentioning
confidence: 97%
“…There was an increase in the P content in the soil, from 14 to 21 mg dm -3 P, in the treatment without addition of P at planting, which may have occurred due to two factors: the P from the organic fertilizer and the correction of soil pH (Lana et al, 2004;Souza et al, 2006), which provided P that was previously unavailable. With doses of 50, 100, 200, 300 and 400 kg ha -1 P2O5, the P content available in the soil increased 2.9; 3.2; 4.1; 3.9 and 4.4 times in relation to the P content in the soil before fertilization.…”
Section: Resultsmentioning
confidence: 98%
“…Whereas the lettuce is a culture with high demand of phosphorus, especially in the final phase of its cycle (Lana et al, 2004), it is necessary to conduct studies in the different edaphoclimatic conditions of the country for proper nutritional management. For the state of Maranhão, there are no studies that support recommendation of phosphorus levels for lettuce.…”
Section: Introductionmentioning
confidence: 99%