Distribution of Soil Algae in Salinized Irrigation Land in the Arid Region of Central Asia : II. A Case Study of 25-Year-Old Bakbakty Farm in the Flood Plain of the River Ili, Kazakstan

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Distribution patterns of soil algae were investigated in the 25-year-old Bakbakty farm and its surroundings in the flood plain of the River Ili, Kazakstan. Using a culture dilution method, the soil algal density was estimated. Soil algal density in the study site was lower by almost one order than that in the 14-year-old Bereke farm Ca. 60 km apart which was previously studied. This difference and the results of the distribution pattern of electric conductivity suggest that salinization was more advanced in the older farm. Multiple linear regression analyses revealed that the density of the green colony group composed of chlorophytes together with xanthophytes was strongly influenced by the soil salinity. On the other hand, the water content in soil was more important than the effect of soil salinity for the distribution of nostocalean blue-green algae. These findings were in good agreement with the results of the previous study. The usefulness of the green colony group as an indicator of soil salinity, was discussed.
社団法人日本土壌肥料学会の論文