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Feeding phytase to swine, combined with adding aluminum chloride to their manure, can cut phosphorus pollution of water as much as 70%, according to a study by Agricultural Research Service (ARS) scientists and cooperators.
Douglas Smith, now a soil scientist at the ARS National Soil Erosion Research Laboratory in West Lafayette, Ind., conducted the study while he was a graduate student at the University of Arkansas at Fayetteville. The study focused on the effects of combining both practices, which have usually been studied separately. Smith worked with soil scientist Phillip Moore at the ARS Poultry Production & Product Safety Research Unit in Fayetteville and with University of Arkansas scientists.
Simply adding aluminum chloride to the manure reduced phosphorus in runoff 53%. Aluminum chloride binds with phosphorus to form an aluminum phosphate, which is less susceptible to losses in runoff. Such a reduction could significantly reduce the amount of phosphorus reaching rivers, lakes ...
Source: HighBeam Research, Feeding phytase to swine, combined with adding aluminum chloride to...