Full TGIF Record # 22853
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Publication Type:
Author(s):Serna, M. D.; Pomares, F.
Author Affiliation:Departemento de Ecologia, Instituto Valenciano de Investigaciones Agarias, Apartado Oficial
Title:Indexes of assessing N availability in sewage sludges
Source:Plant and Soil. Vol. 139, No. 1, January 1992, p. 15-21.
Publishing Information:Dordrecht, Netherland: Martinus Nijhoff Publishers
Related Web URL:http://link.springer.com/article/10.1007/BF00012837
    Last checked: 10/14/2015
    Notes: Abstract only
Keywords:TIC Keywords: Assessment; Nitrogen; Nitrogen mineralization; Nitrogen uptake; Sewage sludge; Zea mays
Abstract/Contents:Biological and chemical methods were used in an attempt to estimate N availability in sewage sludges. The two biological methods, i.e. maize plants grown in pots, and soil-sludge mixtures incubated at 2, 4, 6, 8, 12, and 16 weeks, and the four chemical methods, i.e. autoclave, 0.5 M KMnO4, pepsin and 0.6 M HCl, were compared to determine N availability in twelve sewage sludges in a given soil. In the mineralization test, the aerobically treated sewaged sludges gave higher mineralization rates than the anaerobically treated wastes. The simple correlation between available N, estimated from the plant N uptake during 6 weeks and N extracted by chemical mehtods showed that HCl and pepsin appeared to be the better single indexes. Predicition of availability of N in sewage sludges to plants in the growth chamber improved if N mineralized during the incubation period and extracted by several chemical methods were combined in a multiple regression analysis.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Serna, M. D., and F. Pomares. 1992. Indexes of assessing N availability in sewage sludges. Plant Soil. 139(1):p. 15-21.
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