Dynamics of Forms of Inorganic Phosphorus in Soil under Coffee Plants as a Function of Successive Annual Additions of the Nutrient
Phosphorus (P) dynamics and availability in soils are influenced by P fertilization. This paper aimed to evaluate inorganic P fractions bonded to calcium (Ca), iron (Fe), and aluminum (Al), associating them with soil mineralogy. The experiment was carried out using an acidic kaolinitic-oxidic soil,...
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Published in | Communications in Soil Science and Plant Analysis Vol. 42; no. 8; pp. 980 - 991 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Philadelphia, PA
Taylor & Francis Group
05.04.2011
Taylor & Francis Taylor & Francis Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | Phosphorus (P) dynamics and availability in soils are influenced by P fertilization. This paper aimed to evaluate inorganic P fractions bonded to calcium (Ca), iron (Fe), and aluminum (Al), associating them with soil mineralogy. The experiment was carried out using an acidic kaolinitic-oxidic soil, located in an irrigated area cultivated with coffee plants (Coffee arabica L.), submitted to successive annual fertilizations with triple superphosphate doses of 0, 50, 100 200, and 400 kg ha
−1
phosphorus pentoxide (P
2
O
5
) in randomized blocks with three replications. Phosphorus fractions were determined in soil samples collected at two depths, 0-10 and 10-20 cm, according to the methodology used by
Chang and Jackson (1957
). The inorganic P fractions presented the following sequence: P-Al > P-Fe > P-Ca. The dynamics of forms of inorganic P showed that P-Al is controlling the P bioavailability as a result of an acidic pH and a very simple and thermodynamically stable clay mineralogy, typical of very weathered and old tropical soils. |
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ISSN: | 0010-3624 1532-2416 1532-4133 |
DOI: | 10.1080/00103624.2011.558966 |