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Distribution of sulfur fractions in soil as influenced by management of organic residues

Journal Article · · Soil Science Society of America Journal; (USA)
;  [1]
  1. Oregon State Univ., Corvallis (USA)
A study of the long-term (55 yr) effect of organic residue and inorganic N applications on the distribution of S fractions (inorganic sulfate, C-bonded, ester sulfate, residual, and sulfolipid S) in a Typic Haploxeroll under a wheat-fallow (Triticum aestivum L.) rotation was undertaken. The biennial treatments were: straw (control), straw plus fertilizer (+N) (34 kg N ha{sup {minus}1} from 1931-1966 and 90 kg N ha{sup {minus}1} from 1967-1986), straw plus 2.24 Mg ha{sup {minus}1} of pea vine residue (PV), and straw plus 22.4 Mg ha{sup {minus}1} of strawy manure (M). There was significant treatment effect with the M treatment having 7 to 41% greater total S, and 9 to 22% greater ester sulfate hydriodic reducible S, and nearly two times more C-bonded and sulfolipid S than the remaining treatments. The lowest level for total S occurred in the +N treatment. On a biennial basis, treatments receiving only straw had net inputs of -0.51 and -1.72 kg S ha{sup {minus}1}, respectively, and PV and M treatments had net S inputs of 1.92 and 31.05 kg S ha{sup {minus}1}, respectively. Calculation of the coefficient of simple determination (r{sup 2}) among S fractions and other soil properties showed that whereas organic C and total N had a high r{sup 2} value, total S had a low r{sup 2} with organic C and was more closely related to total N. The r{sup 2} values among the organic S fractions were quite low, except for sulfolipid S and C-bonded (r{sup 2} = 0.45).
OSTI ID:
5568100
Journal Information:
Soil Science Society of America Journal; (USA), Journal Name: Soil Science Society of America Journal; (USA) Vol. 52:5; ISSN SSSJD; ISSN 0361-5995
Country of Publication:
United States
Language:
English