Aluminum is more tightly bound in soil after wollastonite treatment to a forest watershed

TitleAluminum is more tightly bound in soil after wollastonite treatment to a forest watershed
Publication TypeThesis
Year of Publication2016
AuthorsGu, W
Date Published2016///
UniversitySyracuse University
CitySyracuse, NY

Aluminum concentrations decreasedsoil exchange sites and in soil solution after whole watershed wollastonite (CaSiO treatment at the Hubbard Brook Experimental Forest in New Hampshire . This study was conducted to determine whether these decreases could be explained by change in organically bound Al (Al org in soils . The concentration of Al org xchangeable Al (Al KCl ) and other chemical properties in organic ( Oi + Oe, and 0 10 cm mineral soil layer were measured using samples collected prior to treatment (1998) and afterwards (2002, 2006, 2010 and 2014) Compar to pre treatment value org concentrations in the Oa horizon and the 10 cm mineral soil layer incr eased by 12% and 803%, respectively; over the same period KCl concentrations in these horizons decreased by % and %, respectively. Through 2014, the org pool in the 0 10 cm mineral soil layer increased by 602% compar to the pretreatment value, whereas the KCl pool in the Oa horizon decreased by 84%. In the surface Oi + Oe horizon, no significant change in soil Al concentrations and pools were observed after the treatment, though Al KCl concentrations showed a slight decrease. Aluminum is migrating downward from the Oa horizon to the 0 10 cm mineral layer. The predominant form of Al binding has shifted from weaker exchangeable Al to stronger organically bound Al. This conversion of exchangeable Al to organically bound Al has reduced Al solubility and contributed to improve forest health

Thesis Type

MS Thesis