Effect of organic matter and chemical fertilizers on 2, 4-D degradation: Changes in microbiological statns of 2, 4-D-perfnsed soil
1987
Duah- Yentumi, S., Department of Soil Science, University of Ghana, Legon, Ghana) | Kuwatsuka,S., Faculty of Agriculture, Nagoya University, Nagoya, 464, Japan
Various groups of microbial populations and2,4-0-degrading microbes in 2,4-0-enriched soils amended with rice straw, compost and N-P-K fertilizers combined or separately applied were enumerated ·by the most probable number (MPN) and plate count methods, respectively. No recognizable differences in the numbers of yeast and total bacteria were found between the different amendments. The population of 2,4-0-degrading bacteria, however, was greater in N-P-K and compost amendments than in rice straw and control (non-amendment). 2,4-0-degrading bacteria were isolated from the perfused soil and all the strains degraded 2,4-0 rapidly with increasing phosphorus concentration. Moreover, in a medium with glucose or sucrose as organic source, the isolates utilized these materials for growth without attacking 2,4-0 to any extent and vice versa in medium containing cellulose or starch.
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