Nitrogen fertilization effects on soil phosphorus dynamics under a grass-pasture system
dc.contributor.author | Touhami, D | |
dc.contributor.author | McDowell, Richard | |
dc.contributor.author | Condron, LM | |
dc.contributor.author | Bouray, M | |
dc.date.accessioned | 2022-02-10T00:15:26Z | |
dc.date.available | 2022-01-12 | |
dc.date.issued | 2022-01-12 | |
dc.date.submitted | 2021-12-28 | |
dc.date.updated | 2022-02-09T22:24:39Z | |
dc.description.abstract | Nitrogen (N) and phosphorus (P) are critical to pasture productivity; however, limited information is available on how the single and combined additions of N and P affect soil P fractions and seasonal changes in microbial and biochemical processes linked to P cycling under pasture systems. A two-year field trial was conducted where N (0 or 250 kg ha¯¹yr¯¹) and P (0 or 50 kg ha¯¹yr¯¹) were applied in a full factorial design to an intensively managed grass-pasture system. Changes in plant growth and nutrient uptake, soil microbial biomass P, soil phosphatase activities, and soil inorganic and organic P fractions were assessed by regular sampling. Phosphorus addition increased Olsen P and shoot P uptake but not shoot biomass compared to the control. In contrast, N addition decreased Olsen P by 23% but increased both shoot biomass and P uptake by 1.6-fold, compared to the control. Microbial biomass P was irresponsive to N and P additions. Phosphatase enzyme activity significantly increased in summer under N addition, which was linked to labile organic P mineralization. After two growing seasons, N addition alone significantly decreased readily-available inorganic P, labile inorganic P, moderately labile inorganic P, and labile organic P by 75, 19, 7, and 28%, respectively, compared to the control. On the other hand, combined N and P addition significantly decreased readily-available inorganic P, labile inorganic P, and labile organic P by 39, 26, and 28%, respectively, but had no impact on moderately labile inorganic P compared to P addition alone. The findings of this study revealed that short-term N fertilization to N-limited grass-pastures can accelerate P cycling by mobilizing labile inorganic and organic P as well as moderately labile inorganic P pools. However, N fertilization combined with P applications exceeding plant requirements cannot mobilize moderately labile inorganic P, which accumulates under high P sorbing soils. | |
dc.format.extent | 20 pages | |
dc.identifier | https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:000741879000002&DestLinkType=FullRecord&DestApp=WOS_CPL | |
dc.identifier.doi | 10.1007/s10705-021-10191-0 | |
dc.identifier.eissn | 1573-0867 | |
dc.identifier.issn | 1385-1314 | |
dc.identifier.other | 6J7BE (isidoc) | |
dc.identifier.uri | https://hdl.handle.net/10182/14574 | |
dc.language | en | |
dc.language.iso | en | |
dc.publisher | Springer | |
dc.relation | The original publication is available from Springer - https://doi.org/10.1007/s10705-021-10191-0 - http://dx.doi.org/10.1007/s10705-021-10191-0 | |
dc.relation.isPartOf | Nutrient Cycling in Agroecosystems | |
dc.relation.uri | https://doi.org/10.1007/s10705-021-10191-0 | |
dc.rights | © 2022, The Author(s), under exclusive licence to Springer Nature B.V. | |
dc.subject | Italian ryegrass (Lolium multiflorum Lam.) | |
dc.subject | nitrogen fertilization | |
dc.subject | organic P mineralization | |
dc.subject | phosphate enzyme activity | |
dc.subject | soil P fractions | |
dc.subject | soil P cycling | |
dc.subject.anzsrc2020 | ANZSRC::3004 Crop and pasture production | |
dc.subject.anzsrc2020 | ANZSRC::4004 Chemical engineering | |
dc.subject.anzsrc2020 | ANZSRC::4106 Soil sciences | |
dc.title | Nitrogen fertilization effects on soil phosphorus dynamics under a grass-pasture system | |
dc.type | Journal Article | |
lu.contributor.unit | LU | |
lu.contributor.unit | LU|Agriculture and Life Sciences | |
lu.contributor.unit | LU|Agriculture and Life Sciences|SOILS | |
lu.contributor.unit | LU|Research Management Office | |
lu.contributor.unit | LU|Research Management Office|OLD QE18 | |
lu.identifier.orcid | 0000-0003-3911-4825 | |
pubs.issue | 2 | |
pubs.publication-status | Published | |
pubs.publisher-url | http://dx.doi.org/10.1007/s10705-021-10191-0 | |
pubs.volume | 124 |