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Title: | 15N-Uptake, N2-Fixation and Rhizobial. Interstrain Competition in Soybean and Bean, Intercropped with Maize |
Authors: | Abaidoo, Robert C. Kessel, Christopher Van |
Issue Date: | 1989 |
Publisher: | Soil Mot Biochem. |
Citation: | Soil Mot Biochem. Vol. 21, No. I, pp. 155-159, 1989 |
Abstract: | Summary-N2-fixing activity of soybean and beans monocropped or intercropped with maize was
measured by the 15N dilution method. Intercropped bean and soybean, planted in the same hole
with maize , or in two separate planting holes, showed a decrease in atom % 15N as compared
with monocropped bean and soybean. However, compared to when monocropped, intercropped
non-nodulating soybean isoline and unincoulated bean showed a highly significant decrease in
atom % 15N. Whereas the total amount of 15N-label accumulated in monocrop and intercrop
systems remained constant, intercrraped maize accumulated more and intercropped legumes less
15N compared with monocropped maize or legume, respectively. The decrease in atom % 15N
excess of intercropped N2-fixing legumes could be explained by higher N2-fixing activity, a
different 15N-uptake pattern or a difference in competition for soil N between intercropped
legumes and maize.
Intercropping bean or soybeans did not alter the competition pattern of the introduced strains
of rhizobia. TAL 102 (USDA 110) and TAL 182 were the best competitors for soybeans and beans,respectively, and formed the greatest number of nodules, independent of cropping systems tested |
Description: | An article published by Soil Mot Biochem. Vol. 21, No. I, pp. 155-159, 1989 |
URI: | http://hdl.handle.net/123456789/9348 |
Appears in Collections: | College of Science
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