Biological P cycling is influenced by the form of P fertilizer in an Oxisol
Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 croppin...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Springer
2017
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| Online Access: | https://hdl.handle.net/10568/83158 |
| _version_ | 1855519967600967680 |
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| author | Margenot, Andrew J. Sommer, Rolf Mukalama, John Parikh, Sanjai J. |
| author_browse | Margenot, Andrew J. Mukalama, John Parikh, Sanjai J. Sommer, Rolf |
| author_facet | Margenot, Andrew J. Sommer, Rolf Mukalama, John Parikh, Sanjai J. |
| author_sort | Margenot, Andrew J. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 cropping seasons of P applications as Minjingu phosphate rock (PR) or as triple super phosphate (TSP) (50 kg P ha−1 season−1), as well as a P-unfertilized control (0 kg P ha−1 season−1). Soils (0–15 and 15–30 cm) were analyzed for microbial biomass P (Pmic), activities of acid phosphomonoesterase, alkaline phosphomonoesterase, and phosphodiesterase, and sequentially extractable P fractions. P additions as Minjingu PR yielded 299% greater Pmic than TSP at 0–15-cm depth despite similar labile P concentrations in the two P fertilization treatments and stimulated activities of acid phosphomonoesterase (+39%). When added in the soluble form of TSP, a greater percentage of total soil P was present in mineral-bound forms (+33% Fe- and Al-associated P). Higher soil pH under Minjingu PR (pH 5.35) versus TSP (pH 5.02) and the P-unfertilized treatment (pH 4.69) at 0–15-cm depth reflected a liming effect of Minjingu PR. The form of P fertilizer can influence biological P cycling in weathered soils, potentially improving P availability under Minjingu PR relative to TSP via enhanced microbial biomass P and enzymatic drivers of P cycling. |
| format | Journal Article |
| id | CGSpace83158 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace831582025-03-13T09:44:04Z Biological P cycling is influenced by the form of P fertilizer in an Oxisol Margenot, Andrew J. Sommer, Rolf Mukalama, John Parikh, Sanjai J. phosphorus phosphatase oxisol soil soil properties soil fertility fósforo ferralsoles microbiology Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 cropping seasons of P applications as Minjingu phosphate rock (PR) or as triple super phosphate (TSP) (50 kg P ha−1 season−1), as well as a P-unfertilized control (0 kg P ha−1 season−1). Soils (0–15 and 15–30 cm) were analyzed for microbial biomass P (Pmic), activities of acid phosphomonoesterase, alkaline phosphomonoesterase, and phosphodiesterase, and sequentially extractable P fractions. P additions as Minjingu PR yielded 299% greater Pmic than TSP at 0–15-cm depth despite similar labile P concentrations in the two P fertilization treatments and stimulated activities of acid phosphomonoesterase (+39%). When added in the soluble form of TSP, a greater percentage of total soil P was present in mineral-bound forms (+33% Fe- and Al-associated P). Higher soil pH under Minjingu PR (pH 5.35) versus TSP (pH 5.02) and the P-unfertilized treatment (pH 4.69) at 0–15-cm depth reflected a liming effect of Minjingu PR. The form of P fertilizer can influence biological P cycling in weathered soils, potentially improving P availability under Minjingu PR relative to TSP via enhanced microbial biomass P and enzymatic drivers of P cycling. 2017-11 2017-08-16T16:03:35Z 2017-08-16T16:03:35Z Journal Article https://hdl.handle.net/10568/83158 en Open Access Springer Margenot, Andrew J.; Sommer, Rolf; Mukalama, John; Parikh, Sanjai J.. 2017. Biological P cycling is influenced by the form of P fertilizer in an Oxisol . Biology and Fertility of Soils 53(8): 899-909. |
| spellingShingle | phosphorus phosphatase oxisol soil soil properties soil fertility fósforo ferralsoles microbiology Margenot, Andrew J. Sommer, Rolf Mukalama, John Parikh, Sanjai J. Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title | Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title_full | Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title_fullStr | Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title_full_unstemmed | Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title_short | Biological P cycling is influenced by the form of P fertilizer in an Oxisol |
| title_sort | biological p cycling is influenced by the form of p fertilizer in an oxisol |
| topic | phosphorus phosphatase oxisol soil soil properties soil fertility fósforo ferralsoles microbiology |
| url | https://hdl.handle.net/10568/83158 |
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