Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina
The dynamics of soil P forms and particle size fractions was studied under three wheat-based cropping sequences in production systems of Argentina. The whole soil and its coarse (100–2000 µm) and fine (0–100 µm) fractions were analyzed to determine Bray-Kurtz extractable (Pe), organic (Po), inorgani...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2014/532807 |
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| author | Liliana Suñer Juan Galantini Gabriela Minoldo |
| author_facet | Liliana Suñer Juan Galantini Gabriela Minoldo |
| author_sort | Liliana Suñer |
| collection | DOAJ |
| description | The dynamics of soil P forms and particle size fractions was studied under three wheat-based cropping sequences in production systems of Argentina. The whole soil and its coarse (100–2000 µm) and fine (0–100 µm) fractions were analyzed to determine Bray-Kurtz extractable (Pe), organic (Po), inorganic (Pi), and total (Pte) phosphorus. The reference soil was determined at time 0 and compared to a four-year period (time 9 to 12) in three crop sequences: wheat (Triticum aestivum L.)-cattle grazing on natural grasses (WG), continuous wheat (WW), and wheat-legume (WL). Levels of Pe showed differences over time, from 10 to 16 µg g−1 in WG, in line with agriculture and cattle grazing alternate sequences. In WW, P level increased with time, while in WL systems a significant decrease in P from 33.7 to 10.4 µg P g−1 was found during the legume period. Soil P values varied between reference soil and soil samples in year nine and between treatments. Pi was significantly lower in WW, and its concentration increased with time. The coarse fraction of the reference plots had significantly higher levels of Po and Pi than the cultivated treatments, probably a consequence of the particulate organic matter decomposition and coarse mineral particle weathering. The observed changes in Pi content could be attributed to differences in occluded P equilibrium under different soil environments (mainly pH) and crop-tillage-climatic interaction. |
| format | Article |
| id | doaj-art-7df1f3f9437145a8bde0369215e78a33 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
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| series | Applied and Environmental Soil Science |
| spelling | doaj-art-7df1f3f9437145a8bde0369215e78a332025-02-03T01:02:43ZengWileyApplied and Environmental Soil Science1687-76671687-76752014-01-01201410.1155/2014/532807532807Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of ArgentinaLiliana Suñer0Juan Galantini1Gabriela Minoldo2Comisión de Investigaciones Científicas (CIC), CERZOS-UNS, 8000 Bahía Blanca, ArgentinaComisión de Investigaciones Científicas (CIC), CERZOS-UNS, 8000 Bahía Blanca, ArgentinaDepartamento de Agronomía, Universidad Nacional del Sur, 8000 Bahía Blanca, ArgentinaThe dynamics of soil P forms and particle size fractions was studied under three wheat-based cropping sequences in production systems of Argentina. The whole soil and its coarse (100–2000 µm) and fine (0–100 µm) fractions were analyzed to determine Bray-Kurtz extractable (Pe), organic (Po), inorganic (Pi), and total (Pte) phosphorus. The reference soil was determined at time 0 and compared to a four-year period (time 9 to 12) in three crop sequences: wheat (Triticum aestivum L.)-cattle grazing on natural grasses (WG), continuous wheat (WW), and wheat-legume (WL). Levels of Pe showed differences over time, from 10 to 16 µg g−1 in WG, in line with agriculture and cattle grazing alternate sequences. In WW, P level increased with time, while in WL systems a significant decrease in P from 33.7 to 10.4 µg P g−1 was found during the legume period. Soil P values varied between reference soil and soil samples in year nine and between treatments. Pi was significantly lower in WW, and its concentration increased with time. The coarse fraction of the reference plots had significantly higher levels of Po and Pi than the cultivated treatments, probably a consequence of the particulate organic matter decomposition and coarse mineral particle weathering. The observed changes in Pi content could be attributed to differences in occluded P equilibrium under different soil environments (mainly pH) and crop-tillage-climatic interaction.http://dx.doi.org/10.1155/2014/532807 |
| spellingShingle | Liliana Suñer Juan Galantini Gabriela Minoldo Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina Applied and Environmental Soil Science |
| title | Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina |
| title_full | Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina |
| title_fullStr | Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina |
| title_full_unstemmed | Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina |
| title_short | Soil Phosphorus Dynamics of Wheat-Based Cropping Systems in the Semiarid Region of Argentina |
| title_sort | soil phosphorus dynamics of wheat based cropping systems in the semiarid region of argentina |
| url | http://dx.doi.org/10.1155/2014/532807 |
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