Uncertainty in phosphorus fluxes and budgets across the US long-term agroecosystem research network.

Autor: Welikhe P; Department of Agronomy, Purdue University, West Lafayette, Indiana, USA.; USDA-ARS, National Soil Erosion Research Laboratory, West Lafayette, Indiana, USA., Williams MR; USDA-ARS, National Soil Erosion Research Laboratory, West Lafayette, Indiana, USA., King K; USDA-ARS, Soil Drainage Research Unit, Columbus, Ohio, USA., Bos J; USDA-ARS, National Soil Erosion Research Laboratory, West Lafayette, Indiana, USA., Akland M; Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, USA., Baffaut C; USDA-ARS, Cropping Systems and Water Quality Research Unit, Columbia, Missouri, USA., Beck EG; Kentucky Geological Survey, Henderson, Kentucky, USA., Bierer A; USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, Idaho, USA., Bosch DD; USDA-ARS, Southeast Watershed Research Laboratory, Tifton, Georgia, USA., Brooks ES; Department of Soil and Water Resources, University of Idaho, Moscow, Idaho, USA., Buda AR; USDA-ARS, Pasture Systems and Watershed Management Research Unit, University Park, Pennsylvania, USA., Cavigelli M; USDA-ARS, Sustainable Agricultural Systems Laboratory, Beltsville, Maryland, USA., Faulkner J; Department of Plant and Soil Science, University of Vermont, Burlington, Vermont, USA., Feyereisen GW; USDA-ARS, Soil and Water Management Unit, St. Paul, Minnesota, USA., Fortuna AM; USDA-ARS, Grazinglands Research Laboratory, El Reno, Oklahoma, USA., Gamble J; USDA-ARS, Plant Science Research Unit, St. Paul, Minnesota, USA., Hanrahan BR; USDA-ARS, Soil Drainage Research Unit, Columbus, Ohio, USA., Hussain MZ; W.K. Kellogg Biological Station, Michigan State University, Hickory Corners, Michigan, USA., Kovar JL; USDA-ARS, National Laboratory for Agriculture and the Environment, Ames, Iowa, USA., Lee B; Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, USA., Leytem AB; USDA-ARS, Northwest Irrigation and Soils Research Laboratory, Kimberly, Idaho, USA., Liebig MA; USDA-ARS, Northern Great Plains Research Laboratory, Mandan, North Dakota, USA., Line D; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Macrae ML; Department of Geography and Environmental Management, University of Waterloo, Waterloo, Ontario, Canada., Moorman TB; USDA-ARS, National Laboratory for Agriculture and the Environment, Ames, Iowa, USA., Moriasi D; USDA-ARS, Grazinglands Research Laboratory, El Reno, Oklahoma, USA., Mumbi R; Department of Agronomy, Purdue University, West Lafayette, Indiana, USA.; USDA-ARS, National Soil Erosion Research Laboratory, West Lafayette, Indiana, USA., Nelson N; Department of Agronomy, Kansas State University, Manhattan, Kansas, USA., Ortega-Pieck A; Department of Soil and Water Resources, University of Idaho, Moscow, Idaho, USA., Osmond D; Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina, USA., Penn C; USDA-ARS, National Soil Erosion Research Laboratory, West Lafayette, Indiana, USA., Pisani O; USDA-ARS, Southeast Watershed Research Laboratory, Tifton, Georgia, USA., Reba ML; USDA-ARS, Delta Water Management Research Unit, Jonesboro, Arkansas, USA., Smith DR; USDA-ARS, Grassland, Soil and Water Research Laboratory, Temple, Texas, USA., Unrine J; Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky, USA.; Kentucky Water Resources Research Institute, Lexington, Kentucky, USA., Webb P; Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, Arkansas, USA., White KE; USDA-ARS, Sustainable Agricultural Systems Laboratory, Beltsville, Maryland, USA., Wilson H; Agriculture and Agri-Food Canada, Science and Technology Branch, Brandon Research and Development Centre, Brandon, Manitoba, Canada., Witthaus LM; USDA-ARS, National Sedimentation Laboratory, Oxford, Mississippi, USA.
Jazyk: angličtina
Zdroj: Journal of environmental quality [J Environ Qual] 2023 Jul-Aug; Vol. 52 (4), pp. 873-885. Date of Electronic Publication: 2023 Jun 08.
DOI: 10.1002/jeq2.20485
Abstrakt: Phosphorus (P) budgets can be useful tools for understanding nutrient cycling and quantifying the effectiveness of nutrient management planning and policies; however, uncertainties in agricultural nutrient budgets are not often quantitatively assessed. The objective of this study was to evaluate uncertainty in P fluxes (fertilizer/manure application, atmospheric deposition, irrigation, crop removal, surface runoff, and leachate) and the propagation of these uncertainties to annual P budgets. Data from 56 cropping systems in the P-FLUX database, which spans diverse rotations and landscapes across the United States and Canada, were evaluated. Results showed that across cropping systems, average annual P budget was 22.4 kg P ha -1 (range = -32.7 to 340.6 kg P ha -1 ), with an average uncertainty of 13.1 kg P ha -1 (range = 1.0-87.1 kg P ha -1 ). Fertilizer/manure application and crop removal were the largest P fluxes across cropping systems and, as a result, accounted for the largest fraction of uncertainty in annual budgets (61% and 37%, respectively). Remaining fluxes individually accounted for <2% of the budget uncertainty. Uncertainties were large enough that determining whether P was increasing, decreasing, or not changing was inconclusive in 39% of the budgets evaluated. Findings indicate that more careful and/or direct measurements of inputs, outputs, and stocks are needed. Recommendations for minimizing uncertainty in P budgets based on the results of the study were developed. Quantifying, communicating, and constraining uncertainty in budgets among production systems and multiple geographies is critical for engaging stakeholders, developing local and national strategies for P reduction, and informing policy.
(Published 2023. This article is a U.S. Government work and is in the public domain in the USA.)
Databáze: MEDLINE
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