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Sourcing, transport and control of phosphorus loss in two English headwater catchments

Sourcing, transport and control of phosphorus loss in two English headwater catchments Long‐term data on annual phosphorus (P) transfers from an intensively under‐drained largely arable catchment (Rosemaund) and a less intensively drained mixed arable/dairy catchment (Cliftonthorpe) are presented and compared. The range in stream loads of total P (TP) from both catchments was very similar (0.1–4.2 kg ha−1 year−1) and dominated by the particulate (PP) form. At Rosemaund, the majority (approx. 55%) of the P was transferred through pipe drains. The PP transfers in overland flow from arable fields at Rosemaund were estimated to be three times those from extensive grassland and the contribution of hopyards was over 10 times that of arable land. Changing land use from arable to grass at Rosemaund reduced flow and P loss through pipe drains, especially in the third year after establishment. By contrast, at Cliftonthorpe, only 33% of the TP transfer was through pipe drains and PP transfers in overland flow from grassland were estimated to be twice that from arable land. The increased P transfer from grassland was related to livestock poaching mobilizing P on wet riparian fields. However, establishment of a 6‐m riparian grass buffer strip at Cliftonthorpe had no beneficial effect on TP transfer over a 3‐year period and tended to increase the proportion of P transferred in soluble form. Our data highlight the large variability in P loss risk due to land management rather than land use per se, and the potential for PP transfer to occur from grassland as well as from arable land. More long‐term research is needed to fully evaluate the effectiveness of control options in catchments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Soil Use and Management Wiley

Sourcing, transport and control of phosphorus loss in two English headwater catchments

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References (51)

Publisher
Wiley
Copyright
Copyright © 2007 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0266-0032
eISSN
1475-2743
DOI
10.1111/j.1475-2743.2007.00112.x
Publisher site
See Article on Publisher Site

Abstract

Long‐term data on annual phosphorus (P) transfers from an intensively under‐drained largely arable catchment (Rosemaund) and a less intensively drained mixed arable/dairy catchment (Cliftonthorpe) are presented and compared. The range in stream loads of total P (TP) from both catchments was very similar (0.1–4.2 kg ha−1 year−1) and dominated by the particulate (PP) form. At Rosemaund, the majority (approx. 55%) of the P was transferred through pipe drains. The PP transfers in overland flow from arable fields at Rosemaund were estimated to be three times those from extensive grassland and the contribution of hopyards was over 10 times that of arable land. Changing land use from arable to grass at Rosemaund reduced flow and P loss through pipe drains, especially in the third year after establishment. By contrast, at Cliftonthorpe, only 33% of the TP transfer was through pipe drains and PP transfers in overland flow from grassland were estimated to be twice that from arable land. The increased P transfer from grassland was related to livestock poaching mobilizing P on wet riparian fields. However, establishment of a 6‐m riparian grass buffer strip at Cliftonthorpe had no beneficial effect on TP transfer over a 3‐year period and tended to increase the proportion of P transferred in soluble form. Our data highlight the large variability in P loss risk due to land management rather than land use per se, and the potential for PP transfer to occur from grassland as well as from arable land. More long‐term research is needed to fully evaluate the effectiveness of control options in catchments.

Journal

Soil Use and ManagementWiley

Published: Sep 1, 2007

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