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Journal of Environmental Quality Abstract - WASTE MANAGEMENT

Phosphorus Accumulation in Cultivated Soils from Long-Term Annual Applications of Cattle Feedlot Manure

 

This article in JEQ

  1. Vol. 30 No. 1, p. 229-237
     
    Received: Dec 20, 1999


    * Corresponding author(s): whalenj@nrs.mcgill.ca
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doi:10.2134/jeq2001.301229x
  1. Joann K. Whalen * and
  2. Chi Chang
  1. Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada

Abstract

Historically, manure has been recognized as an excellent soil amendment that can improve soil quality and provide nutrients for crop production. In areas of high animal density, however, the potential for water pollution resulting from improper storage or disposal of manure may be significant. The objective of this study was to determine the P balance of cultivated soils under barley (Hordeum vulgare L.) production that have received long-term annual manure amendments. Nonirrigated soils at the study site in Lethbridge, AB, Canada, have received 0, 30, 60, or 90 Mg manure ha−1 (wet wt. basis) while irrigated plots received 0, 60, 120, and 180 Mg ha−1 annually for 16 yr. The amount of P removed in barley grain and straw during the 16-yr period was between 5 and 18% of the cumulative manure P applied. There was a balance between P applied in manure and P recovered in crops and soils (to the 150-cm depth) of nonirrigated plots during the 16-yr study. In irrigated plots, as much as 1.4 Mg P ha−1 added (180 Mg ha−1 yr−1 treatment) was not recovered over 16 yr, and was probably lost through leaching. The risk of ground water contamination with P from manure was greater in irrigated than nonirrigated plots that have received long-term annual manure amendments. Manure application rates should be reduced in nonirrigated and irrigated plots to more closely match manure P inputs to crop P requirements.

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Copyright © 2001. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyPublished in J. Environ. Qual.30:229–237.