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Carbohydrases in Soil as Affected by Successional Stages of Revegetation¹

ABSTRACT

Addition of plant materials from the first successional stage of old-field succession caused a continuous increase in the microbial population and in activities of amylase, invertase, and cellulase for 45 days, the duration of the experiment. On the other hand, addition of plant materials from an intermediate successional stage or the climax stage resulted in an initial increase in the microbial population and in the activities of the three carbohydrases with a leveling off or decrease after 30 days. Type of organic matter added appeared to be responsible for the higher activities of the carbohydrases during the early stages of old-field succession.

¹ This project was done under Grant GB-22859 from the National Science Foundation.

² Post Doctoral Research Associate and Professor, respectively, Dep. of Botany and Microbiology, Univ. of Oklahoma, Norman, Okla. 73069.

Received for publication August 21, 1972. Accepted for publication December 4, 1972.