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Characteristics and Compositional Variation in Round and Square Switchgrass Bales Under Different Storage conditions

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1009098.(doi:10.13031/2013.34826)
Authors:   Amit Khanchi, Carol Jones, Bhavna Sharma
Keywords:   Round bales, square bales, switchgrass, dry matter loss, cellulose, lignin, protein, ash, storage losses

Storage losses in large round and square bales of switchgrass were measured for various outside and inside storage methods. After 3 months in storage, no significant change in dry matter was observed between the treatments. Significant changes in dry matter content were observed after 6 months in storage with highest loss occuring in square bales stored outside and unprotected from the ground. Significant difference was observed in covered and uncovered treatments in dry matter loss and moisture content. After 6 months in storage, average moisture content increased by 204% in uncovered square bales and 57% in uncovered round bales. Covered treatments were equally effective in protecting round and square bales from moisture accumulation and dry matter loss when compared to inside storage treatments. There was an increase in fiber portion of switchgrass bales after storage due to loss of extractives. A significant difference (P<0.0001) in lignin content was observed between covered and uncovered square bales. An increase in protein and ash content was also recorded, but no significant difference was observed between the treatments..

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