Cover crop and phosphorus fertilizer management impacts on surface water quality from a no-till corn-soybean rotation
Carver, RE; Nelson, NO; Roozeboom, KL; Kluitenberg, GJ; Tomlinson, PJ; Kang, Q; Abel, DS
| HERO ID | 11438109 |
|---|---|
| In Press | No |
| Year | 2022 |
| Title | Cover crop and phosphorus fertilizer management impacts on surface water quality from a no-till corn-soybean rotation |
| Authors | Carver, RE; Nelson, NO; Roozeboom, KL; Kluitenberg, GJ; Tomlinson, PJ; Kang, Q; Abel, DS |
| Journal | Journal of Environmental Management |
| Volume | 301 |
| Page Numbers | 113818 |
| Abstract | Best management practices that reduce potential phosphorus (P) loss and provide flexibility in P fertilizer management are needed to help producers protect water quality while maintaining crop yield. This study examined the impacts of P fertilizer management (no P, fall broadcast P, and spring injected P) and cover crop use on annual concentrations and loads of sediment, total P, and dissolved reactive P (DRP) in edge-of-field runoff from a no-till corn (Zea mays)-soybean (Glycine max) rotation in the Central Great Plains, USA, from September 2015 through September 2019. The spring injected P fertilizer treatment generally had 19% less total P and 33% less DRP loss compared to the fall broadcast treatment, confirming the importance of P fertilizer management as a practice for reducing P loss. The addition of a cover crop had an inconsistent effect on total P loss, with no effect in 2016 and 2017, increasing loss in 2018 by 56%, and decreasing it in 2019 by 40%. The inconsistent impact of cover crops on total P loss was related to cover crop effects on sediment loss. Although cover crop impacts on total P losses were inconsistent, the addition of a cover crop increased DRP loss in three of four years. Cover crop use consistently reduced sediment loss, with greater sediment reduction when P fertilizer was applied. Results from this study highlight the benefit of cover crops for reducing sediment loss and the continued need for proper fertilizer management to reduce P loss from agricultural fields. |
| Doi | 10.1016/j.jenvman.2021.113818 |
| Pmid | 34597948 |
| Wosid | WOS:000704970000005 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Keyword | Phosphorus fertilizer; Cover crops; Water quality; Phosphorus loss; Edge-of-field runoff; Erosion |