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This article in JEQ

  1. Vol. 6 No. 2, p. 163-164
     
    Received: June 8, 1976


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doi:10.2134/jeq1977.00472425000600020012x

Characterization of an Agent in Aqueous Extracts of Beef Cattle Manure that Inhibits the Germination of Barley Seeds1

  1. R. G. Bell2

Abstract

Abstract

Aqueous extracts of fresh beef cattle manure and of manure from the surface of a feedlot inhibited the germination of Galt barley (Hordeum vulgare L.) seeds in petri dish germination trials. Neither the polysaccharide nor protein fractions of fresh manure extract inhibited germination. Germination was inhibited similarly by a 1,000-ppm solution of bile salts or by fresh manure extract. It is concluded that the major toxic principle in aqueous manure extracts that inhibits the germination of barley seeds consists of bile salts at concentrations in excess of 200 ppm.

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