Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand
Understanding plant phosphorus (P) uptake and pathways is critical in the rehabilitation of degraded landscapes. This study investigated whether the uptake of P by Lolium rigidum was influenced by forms (inorganic and organic) of nitrogen (N) and whether the forms of N affected P loss by leaching in...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2017
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| Acceso en línea: | https://hdl.handle.net/10568/165192 |
| _version_ | 1855531504403218432 |
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| author | Goloran, Johnvie B. Phillips, Ian R. Chen, Chengrong |
| author_browse | Chen, Chengrong Goloran, Johnvie B. Phillips, Ian R. |
| author_facet | Goloran, Johnvie B. Phillips, Ian R. Chen, Chengrong |
| author_sort | Goloran, Johnvie B. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Understanding plant phosphorus (P) uptake and pathways is critical in the rehabilitation of degraded landscapes. This study investigated whether the uptake of P by Lolium rigidum was influenced by forms (inorganic and organic) of nitrogen (N) and whether the forms of N affected P loss by leaching in bauxite‐processing residue sand (BRS). Gypsum amended BRS was grown with L. rigidum and fertilized with P [calcium di‐hydrogen phosphate, Ca (H2PO4)2], plus different forms of N [e.g. control (CK without N addition, glycine (P‐GL), ammonium (P‐AS) and nitrate (P‐KN))]. The experimental treatments were arranged in a complete randomized design. Aboveground biomass P under P‐KN accounted for 47.4% of applied P, but only 26.0% and 25.0% under P‐AS and P‐GL, respectively. However, root P contents showed a different trend where P‐AS (31.9%) was highest followed by P‐GLY (23.0%) and P‐KN (17.1%). Meanwhile, loss of P via leaching was minimal (<5% of applied P) regardless of treatment, which could be because of the high affinity of residue sand for P via specific adsorption sites. This was supported by high percentage recovery of applied P in BRS growth media under P‐GLY (48.1%), P‐AS (37.2%) and P‐KN (32.0%). It is concluded that loss of P via leaching may not be a problem in BRS; however, limited plant P availability may be of more concern. Further, uptake of P by L. rigidum in alkaline BRS was found to be more efficient under nitrate‐N fertilization. Understanding, however, the specific or associated mechanisms involved warrants further investigation. Copyright © 2016 John Wiley and Sons, Ltd. |
| format | Journal Article |
| id | CGSpace165192 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1651922024-12-22T05:44:57Z Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand Goloran, Johnvie B. Phillips, Ian R. Chen, Chengrong Understanding plant phosphorus (P) uptake and pathways is critical in the rehabilitation of degraded landscapes. This study investigated whether the uptake of P by Lolium rigidum was influenced by forms (inorganic and organic) of nitrogen (N) and whether the forms of N affected P loss by leaching in bauxite‐processing residue sand (BRS). Gypsum amended BRS was grown with L. rigidum and fertilized with P [calcium di‐hydrogen phosphate, Ca (H2PO4)2], plus different forms of N [e.g. control (CK without N addition, glycine (P‐GL), ammonium (P‐AS) and nitrate (P‐KN))]. The experimental treatments were arranged in a complete randomized design. Aboveground biomass P under P‐KN accounted for 47.4% of applied P, but only 26.0% and 25.0% under P‐AS and P‐GL, respectively. However, root P contents showed a different trend where P‐AS (31.9%) was highest followed by P‐GLY (23.0%) and P‐KN (17.1%). Meanwhile, loss of P via leaching was minimal (<5% of applied P) regardless of treatment, which could be because of the high affinity of residue sand for P via specific adsorption sites. This was supported by high percentage recovery of applied P in BRS growth media under P‐GLY (48.1%), P‐AS (37.2%) and P‐KN (32.0%). It is concluded that loss of P via leaching may not be a problem in BRS; however, limited plant P availability may be of more concern. Further, uptake of P by L. rigidum in alkaline BRS was found to be more efficient under nitrate‐N fertilization. Understanding, however, the specific or associated mechanisms involved warrants further investigation. Copyright © 2016 John Wiley and Sons, Ltd. 2017-02 2024-12-19T12:54:49Z 2024-12-19T12:54:49Z Journal Article https://hdl.handle.net/10568/165192 en Wiley Goloran, Johnvie B.; Phillips, Ian R. and Chen, Chengrong. 2016. Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand. Land Degrad Dev, Volume 28 no. 2 p. 628-637 |
| spellingShingle | Goloran, Johnvie B. Phillips, Ian R. Chen, Chengrong Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title | Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title_full | Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title_fullStr | Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title_full_unstemmed | Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title_short | Forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| title_sort | forms of nitrogen alter plant phosphorus uptake and pathways in rehabilitated highly alkaline bauxite processing residue sand |
| url | https://hdl.handle.net/10568/165192 |
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