Adsorption and desorption of phosphorus and nitrogen by immersed stalks

J. E. Gilley, B. Eghball, D. B. Marx

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Adsorption and desorption of phosphorus (P) and nitrogen (N) by stalk residues may influence the concentrations of P and N in runoff. A laboratory study was conducted to measure the effects of P and N constituents in solution on adsorption and desorption of P and N by corn, soybean, and wheat stalk residues. Experimental variables included type of stalk material (corn, soybean, and wheat), inorganic nutrients in solution (PO4-P and NO 3-N; PO 4-P and NH 4-N; NO 3-N and NH 4-N; and PO 4-P, NO 3-N, and NH 4-N), solution concentration (0, 6, 12, and 24 μg g -1 residue), and stalk immersion period (25, 250, 2500, 25000, and 86400 s). The initial concentration of each of the P and N constituents in a particular test solution was the same (0, 6, 12 or 24 μg mL -1). Corn-stalk residues released PO 4-P, NO 3-N, and NH 4-N. The quantity of PO 4-P released generally increased as the length of time the corn stalks were immersed became greater. The presence of P and N constituents in solution in general did not affect the quantity of NO 3-N released by corn-stalk residues. Soybean-stalk residues released PO 4-P and adsorbed relatively small amounts of NH 4-N. Wheat-stalk residues released PO 4-P, and adsorbed NO 3-N and NH 4-N. The presence of stalk residues, P or N solution concentration, and residue immersion period may influence P and N concentrations of overland flow. The amount of P and N adsorbed or desorbed by residue materials can be significantly different if more than one nutrient constituent is present in solution.

Original languageEnglish (US)
Pages (from-to)429-436
Number of pages8
JournalTransactions of the ASABE
Volume52
Issue number2
StatePublished - Mar 2009

Keywords

  • Corn
  • Crop residue
  • Nitrogen movement
  • Nutrient losses
  • Overland flow
  • Phosphorus
  • Runoff
  • Soybean
  • Water quality
  • Wheat

ASJC Scopus subject areas

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

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  • Cite this

    Gilley, J. E., Eghball, B., & Marx, D. B. (2009). Adsorption and desorption of phosphorus and nitrogen by immersed stalks. Transactions of the ASABE, 52(2), 429-436.