Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge
Urban wastes such as sewage sludge can be an economically viable alternative source for providing macro- and micronutrients to plants in tropical conditions. Sewage sludge is normally rich in phosphorus (P), which is present in soils mainly in organic forms, so that it is very important to establish...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2015/720167 |
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| author | Roberta Corrêa Nogueirol Wanderley José de Melo Edna Ivani Bertoncini Luís Reynaldo Ferracciú Alleoni |
| author_facet | Roberta Corrêa Nogueirol Wanderley José de Melo Edna Ivani Bertoncini Luís Reynaldo Ferracciú Alleoni |
| author_sort | Roberta Corrêa Nogueirol |
| collection | DOAJ |
| description | Urban wastes such as sewage sludge can be an economically viable alternative source for providing macro- and micronutrients to plants in tropical conditions. Sewage sludge is normally rich in phosphorus (P), which is present in soils mainly in organic forms, so that it is very important to establish methods for estimating its availability to plants. This study aimed to test three extractants that simulate P-uptake by maize (Zea mays) cropped in plots after 13 consecutive years of fertilization with sewage sludge, in a cycle of fertilized sugarcane (Saccharum L.) amended with sewage sludge and organic compost. Soil samples were collected at depths of 0–10, 10–20, and 20–40 cm in March 2010 from the two experimental areas. Soil P was extracted via ion exchange resin, Mehlich-I, and 0.025 M H2SO4 and determined via colorimetry. Maize and sugarcane diagnostic leaves were collected in the experiments, subjected to nitric-perchloric digestion, and the leaf-P content was determined via colorimetry. No significant correlations were found between phosphorus extracted from soils and phosphorus concentrations in diagnostic leaves. Resin extracted larger amounts of P in the short-term experiment, while acidic extractants yielded larger amounts in the long-term experiment. |
| format | Article |
| id | doaj-art-96340a6ee62f441984755c4d9287711c |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied and Environmental Soil Science |
| spelling | doaj-art-96340a6ee62f441984755c4d9287711c2025-02-03T06:42:05ZengWileyApplied and Environmental Soil Science1687-76671687-76752015-01-01201510.1155/2015/720167720167Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage SludgeRoberta Corrêa Nogueirol0Wanderley José de Melo1Edna Ivani Bertoncini2Luís Reynaldo Ferracciú Alleoni3Department of Soil Science, University of São Paulo (ESALQ/USP), P.O. Box 9, 13418-900 Piracicaba, SP, BrazilDepartment of Technology, São Paulo State University, 14884-900 Jaboticabal, SP, BrazilSão Paulo State Agribusiness Technology Agency, 13400-970 Piracicaba, SP, BrazilDepartment of Soil Science, ESALQ/USP, BrazilUrban wastes such as sewage sludge can be an economically viable alternative source for providing macro- and micronutrients to plants in tropical conditions. Sewage sludge is normally rich in phosphorus (P), which is present in soils mainly in organic forms, so that it is very important to establish methods for estimating its availability to plants. This study aimed to test three extractants that simulate P-uptake by maize (Zea mays) cropped in plots after 13 consecutive years of fertilization with sewage sludge, in a cycle of fertilized sugarcane (Saccharum L.) amended with sewage sludge and organic compost. Soil samples were collected at depths of 0–10, 10–20, and 20–40 cm in March 2010 from the two experimental areas. Soil P was extracted via ion exchange resin, Mehlich-I, and 0.025 M H2SO4 and determined via colorimetry. Maize and sugarcane diagnostic leaves were collected in the experiments, subjected to nitric-perchloric digestion, and the leaf-P content was determined via colorimetry. No significant correlations were found between phosphorus extracted from soils and phosphorus concentrations in diagnostic leaves. Resin extracted larger amounts of P in the short-term experiment, while acidic extractants yielded larger amounts in the long-term experiment.http://dx.doi.org/10.1155/2015/720167 |
| spellingShingle | Roberta Corrêa Nogueirol Wanderley José de Melo Edna Ivani Bertoncini Luís Reynaldo Ferracciú Alleoni Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge Applied and Environmental Soil Science |
| title | Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge |
| title_full | Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge |
| title_fullStr | Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge |
| title_full_unstemmed | Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge |
| title_short | Effectiveness of Extractants for Bioavailable Phosphorus in Tropical Soils Amended with Sewage Sludge |
| title_sort | effectiveness of extractants for bioavailable phosphorus in tropical soils amended with sewage sludge |
| url | http://dx.doi.org/10.1155/2015/720167 |
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