Tolerance of Soybean Rhizobia to Soil Acidity 1
Some nodule bacteria do not tolerate acid soils. A study was initiated to determine if Rhizobium japonicum could adapt to soil acidity and therefore become more effective N z-fixers in association with soybeans (Glycine max L. Merr.) grown in acidic soils. Nodules were obtained from soybeans grow...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
1985
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2589/1/Tolerance_of_Soybean_Rhizobia_to_Soil_Acidity.pdf http://psasir.upm.edu.my/id/eprint/2589/ |
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| Summary: | Some nodule bacteria do not tolerate acid soils. A study was initiated to determine if Rhizobium
japonicum could adapt to soil acidity and therefore become more effective N z-fixers in association
with soybeans (Glycine max L. Merr.) grown in acidic soils. Nodules were obtained from soybeans
grown in fields where the crop had been planted for at least 5 years in soil with pH near 5, 6 or 7. The
nodular material was used for inoculation of soybeans in a factorial experiment grown in methyl
bromide fumigated soil obtained from the same fields as the inoculum. Nitrogenase activity
(C zH z - C zH 4reduction) and plant weight were usedfor evaluating the treatment effects. The results
seem to indicate that the nodular bacteria did not adapt to a given soil pH. Soybeans grown in soil at
pH 6 grew best regardless of whether inoculum was from plants grown at pH 5, 6 or 7. In acid soil,
inoculum from soils at pH 5 was no better than those from pH 6 or 7. |
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