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Photooxidative Approach to Annual Ryegrass (Lolium multiflorum Lam.) Straw Modification with Corresponding Increases in Microbial Response¹

ABSTRACT

The biodegradability of cereal straw in soil is low because of lignin and lignin-cellulose complexes in their structure. Photooxidation prior to soil incorporation was evaluated as a means of modifying these structures to improve biodegradability. Microbial activity increased significantly when an annual ryegrass straw was photooxidized as a 0.5% w/v mixture in water by ultraviolet light in the presence of hydrogen peroxide.

Key Words: photolysis

¹ Contribution of the Department of Microbiology, Oregon St. Univ., Corvallis. 97331. This research was supported in part by the Oregon Seed Growers Leagueand by the Oregon Agr. Exp. Sta., Corvallis. Tech. Paper No. 3194.

² Dep. of Microbiology, Oregon St. Univ., Corvallis. 97331.

³ Dep. of Microbiology, Colorado St. Univ., Fort Collins. 80521.

Received for publication October 18, 1971.