Abstract
Five New Caledonian ultramafic soils were compared for their bacterial and
fungal population densities and for their microbial activity estimated by
fluorescein diacetate (FDA) hydrolysis. The low microbial numbers and
activities were related to the organic matter content and to metallic
toxicity. Actinomycetes were found to be dominant among bacterial populations.
The effect of soil colonisation by plants on the microflora was studied and
appeared to be very favourable. The rhizosphere effect of 2 plant species
(Grevillea gillivrayi and
Costularia comosa) was estimated. The influence of
cropping on the development of microflora in one soil was also investigated
and a qualitative study of the fungal populations and their variation in
relation to the cropping was reported. The fungal flora was dominated by
Moniliaceae, and
Tuberculariaceaeand Dematiaceae
were absent in natural ultramafic soils. Cropping enhanced the diversity of
these fungal populations.
Subject
Earth-Surface Processes,Soil Science,Environmental Science (miscellaneous)
Cited by
17 articles.
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