Technology Transfer of Biopolymer Soil Amendment for Rapid Revegetation and Erosion Control at Fort A. P. Hill, Virginia
ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS ENVIRONMENTAL LAB
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PURPOSE Sustainable land management at Army installations is a critical concern of the modern Army and the Army engineer. A unique soil additive consisting of a polysaccharide polymeric material, a natural product of plantsoil rhyzobial microbial activity, was demonstrated to enhance site vegetation and control erosion. The effort was supported by the Environmental Security Technology Certification Program ESTCP, Project ER-0920 of the Department of Defense. Rhizobium tropici, a catalogued symbiotic nodulator of leguminous plants Martinez-Romero et al. 1991, is also known for its prolific production of a gel-like, extracellular polymeric substance EPS, a biopolymer Gil-Serrano et al. 1990. The natural functions of the EPS in the rhizosphere include surface adhesion, self-adhesion of cells into biofilms, formation of protective barriers, water retention around roots, and nutrient accumulation Laspidou and Rittmann 2002. The secretion of EPS by bacteria is recognized as a cohesive force in promoting surface erosion resistance in sediments Droppo 2009, Gerbersdorf et al. 2008a, 2008b.
- Hydrology, Limnology and Potamology
- Soil Mechanics