Effects of giant burreed (Sparganium eurycarpum ) and shade on wild rice (Zizania palustris ).

SA Clay, E A Oelke

Research output: Contribution to journalArticlepeer-review


Studies were conducted at Grand Rapids, MN, to determine the effect of giant burreed (Sparganium eurycarpum Engelm. No. 3 SPGEU) planted at 6, 12, and 24 corms/m super(2) on wild rice (Zizania palustris) L. "K2") growth and yield. Giant burreed, a spreading perennial, had shoot densities of 21, 29, and 42/m super(2) at harvest for the 6, 12, and 24 corms/m super(2) treatments, respectively. Wild rice yield and panicle number were reduced approximately 60% when giant burreed shoot density was 40/m super(2) or higher when compared to the weed-free control. Reduction of PAR penetration into the wild rice canopy appears to be the major mechanism of giant burreed interference with wild rice.
Original languageEnglish (US)
Pages (from-to)640-646
Number of pages7
JournalWeed Science
Issue number5
StatePublished - 1987


  • ecology
  • growth
  • Minnesota
  • Zizania palustris
  • photosynthesis
  • plant density
  • Sparganium
  • plant competition
  • Weeds
  • Ecology Abstracts
  • Sparganium eurycarpum
  • D 04636:Grasses
  • interspecific relationships
  • shading

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