Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips
Phosphorus (P) is an important element for crop production. A low concentration limits crop growth whereas the residual quantity after fertilization contributes to eutrophication of surface waters. A key to success in the soil P management is its accurate estimation and potential supply to the plant...
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| Formato: | H2 |
| Lenguaje: | Inglés |
| Publicado: |
SLU/Dept. of Soil and Environment
2016
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| Materias: |
| _version_ | 1855571494073008128 |
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| author | Tuyishime, Jean Rene Marius |
| author_browse | Tuyishime, Jean Rene Marius |
| author_facet | Tuyishime, Jean Rene Marius |
| author_sort | Tuyishime, Jean Rene Marius |
| collection | Epsilon Archive for Student Projects |
| description | Phosphorus (P) is an important element for crop production. A low concentration limits crop growth whereas the residual quantity after fertilization contributes to eutrophication of surface waters. A key to success in the soil P management is its accurate estimation and potential supply to the plant. The objective of this project was to compare the soil P extractability between the Pi- filter strip method and P depletion without a sink (0.01 M CaCl2). The results were compared to those obtained using ammonium lactate (AL), Olsen (OL) soil P tests. The results showed that the efficiency of different methods decreased in the order Pi (62-85%) > OL (25-40%) > 0.01 M CaCl2 (8-24%) of the total P extracted by AL. A strong correlation (r = 0.99) was obtained between the pairs (Pi; AL), (Pi; OL), and (OL; AL). Further, it was found that all methods were equally well correlated (the r was between 0.88 and 0.90) with the depletion method. The soil with the highest P adsorption capacity had higher values of P extracted by the AL, Pi and OL methods but was lower in 0.01 M CaCl2 extractable P. The results indicated that in the soils studied, the efficiency of the Pi-filter strip method in comparison to the routine P tests (AL and OL) was not attributed to the soil properties. It was rather attributed to the length of soil P desorption time and the number of filter strips. |
| format | H2 |
| id | RepoSLU9291 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés |
| publishDate | 2016 |
| publishDateSort | 2016 |
| publisher | SLU/Dept. of Soil and Environment |
| publisherStr | SLU/Dept. of Soil and Environment |
| record_format | eprints |
| spelling | RepoSLU92912016-07-12T14:10:53Z Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips Tuyishime, Jean Rene Marius phosphorus Pi-filter strip desorption depletion soil phosphorus tests Phosphorus (P) is an important element for crop production. A low concentration limits crop growth whereas the residual quantity after fertilization contributes to eutrophication of surface waters. A key to success in the soil P management is its accurate estimation and potential supply to the plant. The objective of this project was to compare the soil P extractability between the Pi- filter strip method and P depletion without a sink (0.01 M CaCl2). The results were compared to those obtained using ammonium lactate (AL), Olsen (OL) soil P tests. The results showed that the efficiency of different methods decreased in the order Pi (62-85%) > OL (25-40%) > 0.01 M CaCl2 (8-24%) of the total P extracted by AL. A strong correlation (r = 0.99) was obtained between the pairs (Pi; AL), (Pi; OL), and (OL; AL). Further, it was found that all methods were equally well correlated (the r was between 0.88 and 0.90) with the depletion method. The soil with the highest P adsorption capacity had higher values of P extracted by the AL, Pi and OL methods but was lower in 0.01 M CaCl2 extractable P. The results indicated that in the soils studied, the efficiency of the Pi-filter strip method in comparison to the routine P tests (AL and OL) was not attributed to the soil properties. It was rather attributed to the length of soil P desorption time and the number of filter strips. SLU/Dept. of Soil and Environment 2016 H2 eng https://stud.epsilon.slu.se/9291/ |
| spellingShingle | phosphorus Pi-filter strip desorption depletion soil phosphorus tests Tuyishime, Jean Rene Marius Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title | Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title_full | Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title_fullStr | Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title_full_unstemmed | Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title_short | Sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| title_sort | sequential phosphorus extraction using iron (hydr)oxide-impregnated filter paper strips |
| topic | phosphorus Pi-filter strip desorption depletion soil phosphorus tests |