Among-site variability in environmental and management characteristics: Effect on nutrient loss in agricultural tile drainage |
| |
| Affiliation: | 1. Department of Hydrology, Geological Survey of Denmark and Greenland, Øster Voldagde 10, 1350 Copenhagen, Denmark;2. LandboSyd, Jens Terp-Nielsens Vej 13, 6200 Aabenraa, Denmark;3. Department of Geochemistry, Geological Survey of Denmark and Greenland, Øster Voldagde 10, 1350 Copenhagen, Denmark;4. Department of Agroecology, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark;5. SEGES, Agro Food Park 15, 8200 Aarhus N, Denmark;1. Iowa Geological Survey, University of Iowa, Iowa City, IA, United States of America;2. Center for Agricultural and Rural Development, Iowa State University, Ames, IA, United States of America;3. IIHR-Hydroscience & Engineering, University of Iowa, Iowa City, IA, United States of America;4. Grassland Soil and Water Research Laboratory, USDA-ARS, Temple, TX, United States of America;1. Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON N2L 3G1, Canada;2. Environmental Management Branch, Ontario Ministry of Agriculture, Food and Rural Affairs, London, ON N6E 1L3, Canada;3. Environmental Management Branch, Ontario Ministry of Agriculture, Food and Rural Affairs, Woodstock, ON N4T 1W2, Canada;1. Dept. of Geography and Environmental Management, University of Waterloo, Waterloo, ON N2L 3G1, Canada;2. Dept. of Geography and Environmental Studies, Wilfrid Laurier University, Waterloo, ON N2L 3C5, Canada;3. Ridgetown Campus, University of Guelph, Ridgetown, ON N0P 2C0, Canada |
| |
| Abstract: | Water quality issues, including harmful and nuisance algal blooms (HNABs), related to nitrogen (N) and phosphorus (P) exported from agricultural lands persist in the Great Lakes region. Previous work examining N and P loss from agricultural fields in portions of the United States (US) and Canada (CA) that drain into Lake Erie, consistently indicate significant nutrient loss from fields in Indiana and Ohio, US compared with those in southwestern Ontario, CA. The primary objective of this study was to examine variation in environmental and management characteristics from 30 sites (US: n = 28, CA: n = 2) located within the Lake Erie Basin and subsequently determine the influence of among-site variation on edge-of-field N and P losses. Using principal component analyses (PCA), we found that among-site variation was predominantly controlled by broad-scale patterns in fertilizer management practices and soil properties; however, N and P loss metrics were largely unexplained by these gradients. As such, fine-scale variability and the interaction of environmental and management characteristics at individual sites more strongly influenced N and P loss. Ultimately, these results further emphasize the importance of site- and nutrient-specific management plans that are needed to mitigate N and P losses from agricultural fields. |
| |
| Keywords: | Agricultural land use Agricultural management Nitrogen Phosphorus |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
