Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method
Abstract Management of phosphorus (P) inputs to agroecosystems is often evaluated by phosphorus use efficiency (PUE), but different calculation approaches may yield discrepancies in estimated PUE values. We evaluated PUE (i) indirectly calculated by difference in crop P uptake between a P‐fertilized...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-06-01
|
| Series: | Agricultural & Environmental Letters |
| Online Access: | https://doi.org/10.1002/ael2.70022 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849424810813161472 |
|---|---|
| author | Andrew J. Margenot Neha Chatterjee Chongyang Li |
| author_facet | Andrew J. Margenot Neha Chatterjee Chongyang Li |
| author_sort | Andrew J. Margenot |
| collection | DOAJ |
| description | Abstract Management of phosphorus (P) inputs to agroecosystems is often evaluated by phosphorus use efficiency (PUE), but different calculation approaches may yield discrepancies in estimated PUE values. We evaluated PUE (i) indirectly calculated by difference in crop P uptake between a P‐fertilized versus a P‐unfertilized control (PUEdiff) and (ii) directly measured by tracing radioisotopically labeled fertilizer P (PUEisotope). Using two ammonium phosphate fertilizers of high (monoammonium phosphate [MAP]) and low (struvite) water solubility in three soils with non‐limiting extractable soil P concentrations (Mehlich‐3 P > 25 mg kg−1), we find dissimilar PUEisotope versus PUEdiff. PUEdiff often yielded negative values (77% of observations), whereas PUEisotope was (i) positive and (ii) higher (two‐ to fourfold) for MAP than struvite, and (iii) unassociated with soil Mehlich‐3 P concentrations. Thus, PUEdiff appears to underestimate PUE and miss differences in PUE among fertilizerss. Our results raise the need to reconsider calculation of PUE and to address practical challenges to in situ measurement of PUEisotope. |
| format | Article |
| id | doaj-art-813bb83a01334a4ba82b0a97757328ea |
| institution | Kabale University |
| issn | 2471-9625 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Agricultural & Environmental Letters |
| spelling | doaj-art-813bb83a01334a4ba82b0a97757328ea2025-08-20T03:29:58ZengWileyAgricultural & Environmental Letters2471-96252025-06-01101n/an/a10.1002/ael2.70022Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference methodAndrew J. Margenot0Neha Chatterjee1Chongyang Li2Department of Crop Sciences University of Illinois Urbana‐Champaign Urbana Illinois USADepartment of Crop Sciences University of Illinois Urbana‐Champaign Urbana Illinois USAAgroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment University of Illinois Urbana‐Champaign Urbana Illinois USAAbstract Management of phosphorus (P) inputs to agroecosystems is often evaluated by phosphorus use efficiency (PUE), but different calculation approaches may yield discrepancies in estimated PUE values. We evaluated PUE (i) indirectly calculated by difference in crop P uptake between a P‐fertilized versus a P‐unfertilized control (PUEdiff) and (ii) directly measured by tracing radioisotopically labeled fertilizer P (PUEisotope). Using two ammonium phosphate fertilizers of high (monoammonium phosphate [MAP]) and low (struvite) water solubility in three soils with non‐limiting extractable soil P concentrations (Mehlich‐3 P > 25 mg kg−1), we find dissimilar PUEisotope versus PUEdiff. PUEdiff often yielded negative values (77% of observations), whereas PUEisotope was (i) positive and (ii) higher (two‐ to fourfold) for MAP than struvite, and (iii) unassociated with soil Mehlich‐3 P concentrations. Thus, PUEdiff appears to underestimate PUE and miss differences in PUE among fertilizerss. Our results raise the need to reconsider calculation of PUE and to address practical challenges to in situ measurement of PUEisotope.https://doi.org/10.1002/ael2.70022 |
| spellingShingle | Andrew J. Margenot Neha Chatterjee Chongyang Li Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method Agricultural & Environmental Letters |
| title | Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| title_full | Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| title_fullStr | Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| title_full_unstemmed | Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| title_short | Radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| title_sort | radioisotopic labeling reveals inaccuracy of phosphorus use efficiency of ammonium phosphate fertilizers calculated by the difference method |
| url | https://doi.org/10.1002/ael2.70022 |
| work_keys_str_mv | AT andrewjmargenot radioisotopiclabelingrevealsinaccuracyofphosphorususeefficiencyofammoniumphosphatefertilizerscalculatedbythedifferencemethod AT nehachatterjee radioisotopiclabelingrevealsinaccuracyofphosphorususeefficiencyofammoniumphosphatefertilizerscalculatedbythedifferencemethod AT chongyangli radioisotopiclabelingrevealsinaccuracyofphosphorususeefficiencyofammoniumphosphatefertilizerscalculatedbythedifferencemethod |