Impacts of cover crops and crop residues on phosphorus losses in cold climates: a review
| dc.contributor.author | Liu, J. | |
| dc.contributor.author | Elliott, J.A. | |
| dc.contributor.author | Macrae, M.L. | |
| dc.contributor.author | Baulch, H.M. | |
| dc.contributor.author | Wilson, H.F. | |
| dc.contributor.author | Kleinman, P.J.A | |
| dc.date.accessioned | 2019-04-30T22:41:35Z | |
| dc.date.available | 2019-04-30T22:41:35Z | |
| dc.date.issued | 2019-03-05 | |
| dc.description.abstract | The use of plants in riparian buffers or cover crops is widely proposed as a strategy to mitigate sediment and nutrient losses from land to water. In cold climates, concerns may arise with regard to potentially elevated phosphorus (P) losses associated with freeze-thaw of plant materials. Here, we review the impacts of cover crops and crop residues on P loss in cold climates, and explore linkages between water extractable P in the plant materials and P loss in surface runoff and subsurface drainage from cropped soils. Water extractable P in plants is greatly affected by crop species and hardiness, as well as freezing regimes including both freezing temperature and the number of freeze-thaw cycles. Although controls on water extractable P in plant tissues and residues are relatively well understood, impacts on P runoff and leaching are inconsistent across studies due to the influences of soil, climate, and management factors. This review sheds light on improving winter crop cover management to minimize P losses from land to water in cold climates and points to future research needs. Specifically, more research is needed to understand interactions between soil, plant, hydrology, and management in influencing P loss, and to improve the assessment of crop contributions to P loss in field settings of cold climates. Further, the trade-offs between the concern over P and the control of sediment loss and nitrogen leaching should be acknowledged, as should the uncertainties of freezing and crop adaptability under future climate regimes. | en_US |
| dc.description.version | Non-Peer Reviewed | en_US |
| dc.identifier.uri | http://hdl.handle.net/10388/12028 | |
| dc.language.iso | en | en_US |
| dc.relation.ispartof | Soils and Crops Workshop | en_US |
| dc.rights | Attribution-NonCommercial-NoDerivs 2.5 Canada | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ | * |
| dc.title | Impacts of cover crops and crop residues on phosphorus losses in cold climates: a review | en_US |
| dc.type | Presentation | en_US |