Authors: P. Milburn, J.A. Macleod and B. Sanderson
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Published in: CBE Journal » CBE Journal Volume 39 (1997)

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The ability of a catch crop (winter wheat) and a lightly incorporated straw mulch to reduce N03-N leaching following harvest of early potatoes (variety Superior) on Prince Edward Island (PEl) was evaluated over two cycles of a potato-cereal rotation, from spring 1989 to spring 1993. The extent of nitrate leaching from each treatment was indicated by the mean annual (spring to spring) flow-weighted N03-N concentration (N03-Nr) of tile drainage water. Mean annual values for the winter wheat and barley crops in the rotation ranged from 2.9 to 7.7 mg/L. For the first potato crop, both fall treatments significantly reduced N03-Nr values, from 12.8 mg/L in the control to 10.7 mg/L for the straw incorporated and to 8.8 mg/L for the winter wheat crop. For the second potato crop, only the straw-incorporated treatment was significantly lower than the control, 27.5 compared to 18.0 mg/L. The relatively short time available for plant biomass accumulation following fall planting in PEl appears to limit the ability of winter wheat to consistently reduce post-harvest N03-N leaching. Soil profile N03-N content measured by coring in late fall and early spring after potatoes were grown did not show any significant differences among treatments.

Citation: P. Milburn, J.A. Macleod and B. Sanderson 1997. CONTROL OF FALL NITRATE LEACHI ,G FROM EARLY HARVESTED POTATOES ON PRINCE EDWARD ISLAND. Canadian Agricultural Engineering 39(4):263-271.
Volume: 39
Issue: 4
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Date: 1997
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Type: Text.Article
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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