Journal
SOIL USE AND MANAGEMENT
Volume 21, Issue 4, Pages 432-434Publisher
CABI PUBLISHING
DOI: 10.1079/SUM2005352
Keywords
phosphorus; sodium; sea salmon sludge; fertilizer equivalent
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To evaluate the effect of sea salmon sludge on soil and ryegrass yield and quality, five treatments were tested (30, 60 and 90 t ha(-1) of sludge, inorganic fertilizer and control). The sludge contained 16% dry matter (DM), 0.13% total N and 1.6% P. The sludge increased ryegrass DM yield, P and Na content, but decreased K concentrations in soil and plants. Sludge can be applied successfully on to land, but its addition should be complemented with inorganic nutrients (N, K). The high Na content of the sludge may limit repeated application, but the main benefit is its P content.
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