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The Fate of Sulfate in Acidified Pig Slurry during Storage and Following Application to Cropped Soil

Dep. of Agroecology and Environment, Faculty of Agricultural Sciences, Univ. of Aarhus, PO Box 50, 8830 Tjele, Denmark

View larger version (24K): [in this window] [in a new window]   Fig. 1. Dry matter content, pH and content of sulfate, dissolved and total sulphide in untreated and acidified pig slurry stored at 2, 10, and 20°C. Error bars: SE (n = 4).

View larger version (15K): [in this window] [in a new window]   Fig. 2. Content of sulfate and total sulphide in untreated pig slurry stored at 20°C. Error bars: SE (n = 4).

View larger version (17K): [in this window] [in a new window]   Fig. 3. Content of total S at Day 0 and 225 in untreated and acidified pig slurry stored at 2, 10, and 20°C. Error bars: SE (n = 12 for Day 0 and n = 4 for Day 225).

View larger version (33K): [in this window] [in a new window]   Fig. 4. Yield and S-uptake in spring barley in pot experiment with application of inorganic S fertilizer and untreated and acidified slurry either fresh or stored at 2, 10, and 20°C. Error bars: SE (n = 3 for inorganic S, n = 4 for slurry).