Livestock Farm Phosphorus Import/Export Analysis and Strategies for Phosphorus Management
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Livestock Farm Phosphorus Import/Export Analysis and Strategies for Phosphorus Management
Alternative title
Authors
Published Date
2015
Publisher
University of Minnesota Extension
Type
Presentation
Abstract
Objective of this project is to measure farm-gate phosphorus (P) import/export balances on Minnesota dairy farms and beef feedlots, identify imbalance sources, and examine strategies for reducing excess soil test phosphorus (STP) buildup. When livestock farms are land-limited relative to manure-P STP can rise, increasing dissolved and particulate P in runoff, and increasing algae growth in rivers and lakes. Detailed spreadsheet analyses of P imports and exports on fourteen dairy and five beef feedlots collected where there was expectation of excess P imports over exports. Excess P ranged from less than 1 to 130 kg ha-1 year-1. Feed and fertilizer were the largest P import sources with feed supplements usually the largest. There were case studies developed in four management areas: 1. Feed management: reduce ration P to National Research Council recommendations, and reduce feed waste. 2. Herd management: breed all heifers to freshen at 22-24 months, and reduce heifer inventory. 3. Crop management: increase crop yields and forage quality, and base P fertilizer applications (including starter) on university guidelines. 4. Manure management: transport manure to distant low STP fields, sell manure, and incorporate manure to conserve nitrogen (N), allowing reduced application rates to meet crop N requirements. Case studies presented at 21 workshops to dairy farms, beef feedlots, and agricultural professionals. Almost half of producer attendees stated their operations are likely out of balance; most are considering adopting one or more of the strategies presented. The case studies posted on completion at the UMN Extension website at z.umn.edu/manure.
Keywords
Description
Related to
Replaces
License
Collections
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Other identifiers
Suggested citation
Everett, Leslie; Pepin, Randy. (2015). Livestock Farm Phosphorus Import/Export Analysis and Strategies for Phosphorus Management. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/175133.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.