RESEARCH REPORTS FROM INSTITUTE FOR AGRO-MICROBIOLOGY, Vol. 2, 1998 p.19-32
Copyright © Institute for Agro-Microbiology. All Rights Reserved.

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GRANT REPORT

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2.Comparison of Microbiological and Biochemical Properties on Some Different Treated Fields Soils

Ichio Nioh(Faculty of Agriculture, Shizuoka University)

1.
Number and kinds of rhizosphere and nitrogen fixing bacteria of the roots of tea plants
cultivated under natural and conventional farming systems were compared. About 60% of therhizosphere isolates from the natural farming field were Burkholderia gladioli and 14% B.cepacia. On the other hand, about half of the isolates from the conventional farming did not belong to the known genera based of MIS data base. The kind of nitrogen-fixing bacteria wasalso different between the roots of two cultivation systems.

2.
Some biochemical characteristics of the cultivated soils with different fertilization manage-ments were examined. Higher ratio of polyhydrolybutyric acid/total phospholipid fatty acids ofthe soils supplied with chemical fertilizer was noticed.

Keywords: Rhizosphere bacteria, Nitrogen-fixing bacteria, Fluorescent Pseudomonas, Natural farming, Soil biochemical activity