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Management Options to Reduce Phosphorus Leaching from Vegetated Buffer Strips.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hille, Sandra Graeber, Daniel Kronvang, Brian Rubæk, Gitte H. Onnen, Nils Molina-Navarro, Eugenio Baattrup-Pedersen, Annette Heckrath, Goswin Stutter, M. I. |
| Copyright Year | 2019 |
| Abstract | Vegetated buffer strips (VBS) between agricultural areas and surface waters are important retention areas for eroded particulate P through which they may obtain critically high degrees of P saturation imposing high risk of soluble P leaching. We tested topsoil removal and three harvesting frequencies (once, twice, or four times per year) of natural buffer vegetation to reduce P leaching with the aim to offset erosional P accumulation and high degrees of P saturation. We used a simple numerical time-step model to estimate changes in VBS soil P levels with and without harvest. Harvesting offset erosional deposition as it resulted in an annual ammonium oxalate-extractable P reduction of 0.3 to 2.8% (25-cm topsoil content) in soils of the VBS and thus, with time, reduced potential P leaching below a baseline of 50 μg L. Topsoil removal only marginally reduced potential leaching at two sites and not anywhere near this baseline. The harvest frequency only marginally affected the annual P removal, making single annual harvests the most economical. We estimate 50 to 300 yr to reach the P leaching baseline, due to substantial amounts of P accumulated in the soils. Even in high-erosion-risk situations in our study, harvesting reduced soil P content and the P leaching risk. We suggest harvesting as a practical and efficient management to combat P leaching from agricultural VBS, not just for short-term reductions of dissolved P, but also for reductions of the total soil P pool and for possible multiple benefits for VBS. |
| Starting Page | 322 |
| Ending Page | 329 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.2134/jeq2018.01.0042 |
| PubMed reference number | 30951111 |
| Journal | Medline |
| Volume Number | 48 |
| Issue Number | 2 |
| Alternate Webpage(s) | https://dl.sciencesocieties.org/publications/jeq/supplements/0/jeq2018.01.0042-supplement2.pdf |
| Alternate Webpage(s) | https://dl.sciencesocieties.org/publications/jeq/supplements/0/jeq2018.01.0042-supplement1.pdf |
| Journal | Journal of environmental quality |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
