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Effects of Alum and Aluminum Chloride on Phosphorus Runoff from Swine Manure

Dep. of Crops, Soils and Environmental Sciences, Univ. of Arkansas, Fayetteville, AR 72701

View larger version (34K): [in a new window]   Fig. 1. Effect of alum and aluminum chloride on (A) manure pH and (B) total dissolved phosphorus (TDP) and soluble reactive phosphorus (SRP) in swine manure. Different letters indicate significant difference at P 0.05.

View larger version (58K): [in a new window]   Fig. 2. Effect of alum and aluminum chloride additions to swine manure on (A) runoff water pH and (B) soluble reactive phosphorus (SRP) concentration in runoff water. Different letters indicate significant difference at P 0.05.

View larger version (13K): [in a new window]   Fig. 3. The relationship between soluble reactive phosphorus (SRP) in runoff water and SRP in manure.

View larger version (81K): [in a new window]   Fig. 4. Effect of alum and aluminum chloride additions to swine manure on (A) tall fescue yields and (B) nitrogen uptake by fescue. Different letters indicate significant difference at P 0.05.