Journal
JOURNAL OF PLANT NUTRITION
Volume 41, Issue 16, Pages 2057-2068Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2018.1485164
Keywords
growth; magnesium; nodulation; pod; rhizobium inoculation; soybean
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Funding
- UNESCO & CHINA Great Wall Fellowship Program
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Magnesium (Mg) deficiency is one of the major nutritional problems in tropic and subtropic areas, where the most soils are acidic. In this study, the effects of Mg application and Bradyrhizobium inoculation on growth, nodulation, symbiotic nitrogen (N) fixation as well as N nutrition status in soybean (Glycine max L.) were investigated in hydroponics under greenhouse conditions. With the increase of Mg up to 0.75 mM at low N and up to 0.5 mM at high N solutions, the dry weights of shoots, roots, and pod grain yield in soybean were increased, while further increase in Mg supply inhibited soybean growth. The availability of Mg was found to entail an improved uptake of N by plants and nodulation process in the root by Bradyrhizobium. Inoculation with rhizobial inoculants not only formed many nodules, but also increased soybean shoot, root biomass and yield, as well as plant N nutrient status.
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