Effects of different treatments of cattle slurry manure on water-extractable phosphorus

L. Chapuis-Lardy, E.J.M. Temminghoff, R.G.M. de Goede

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

Cattle slurry manure applied to land increases the risk of phosphorus (P) movement to surface waters, which may lead to eutrophication. The water-extractable fraction of P in slurry manure is correlated with P concentration in runoff from soils amended with slurry smanure, and thus is an effective indicator of environmental P loss. We evaluated the water-extractable P (WEP) and readily soluble P (RSP; i.e., P extractable in a single water extract) contents in slurry manure from nine farms. On some farms, the additive Euromestmix® (MX) is used to complex N-compounds in the slurry manure, but the effect of MX on P in the slurry manure is not known. We also focused on methodological factors affecting the measurement of P in slurry manure. Drying the slurry manure before analysis decreased WEP and RSP contents. Dilution of slurry manure by varying the dry matter-to-distilled water ratio increased the water-extractable fractions. Analysis of calcium and magnesium contents in water showed that these minerals are involved in the release of P in water. Total RSP content of slurry manures from the nine farms ranged from 1.83 to 4.06 mg P per g dry matter. A substantial portion of total P in the slurry manure occurred in the water-extractable (46–71%) and the readily soluble P fractions (24–51%). The addition of MX tended to decrease the readily soluble inorganic P content of slurry manures.
Original languageEnglish
Pages (from-to)91-102
JournalNetherlands Journal of Agricultural Science
Volume51
Issue number1-2
Publication statusPublished - 2003

Keywords

  • cattle manure
  • cattle slurry
  • treatment
  • phosphorus
  • chemical properties
  • additives
  • solubility
  • water pollution
  • manure treatment
  • runoff phosphorus
  • animal manure
  • nitrogen
  • soil
  • netherlands
  • strategies
  • management
  • excretion
  • recovery
  • losses

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