Nutrient concentrations of runoff during the year following manure application

John E. Gilley, Bahman Eghball, David B. Marx

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Little information is currently available concerning temporal changes in nutrient transport following the addition of manure to cropland areas. This study was conducted to measure nutrient transport in runoff as affected by tillage and time following the application of beef cattle or swine manure to a site on which corn (Zea mays L.) was grown. Rainfall simulation tests were initiated 4, 32, 62, 123, and 354 days following land application. Three 30 min simulated rainfall events, separated by 24 h intervals, were conducted at an intensity of approximately 70 mm h -1. Dissolved phosphorus (DP), particulate phosphorus (PP), total phosphorus (TP), NO 3-N, NH 4-N, total nitrogen (TN), electrical conductivity (EC), and pH were measured from 0.75 m wide by 2 m long plots. Concentrations of DP, TP, and NH 4-N, in general, declined throughout the year on both the no-till cattle and no-till swine manure treatments. Tillage did not significantly affect concentrations of DP, PP, TP, NH 4-N, orpH on the swine manure treatments, but significant variations in these variables were measured over time. Under no-till and tilled conditions on both the cattle and swine manure treatments, the smallest concentrations of DP, NO 3-N, NH 4-N, and TN occurred on the final test date. The increase in pH of runoff during the study is attributed to the addition of CaCO 3 to the rations of beef cattle and swine. Tillage appeared to have less of an impact on runoff nutrient transport from cropland areas than length of time since manure application.

Original languageEnglish (US)
Pages (from-to)1987-1999
Number of pages13
JournalTransactions of the ASABE
Volume50
Issue number6
StatePublished - Nov 2007

Keywords

  • Eutrophication
  • Land application
  • Manure management
  • Manure runoff
  • Nitrogen movement
  • Nutrient losses
  • Phosphorus
  • Runoff
  • Tillage
  • Water quality

ASJC Scopus subject areas

  • Forestry
  • Food Science
  • Biomedical Engineering
  • Agronomy and Crop Science
  • Soil Science

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