| Pak. J. Bot., 38(2): 459-464, 2006. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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EFFECT OF RHIZOBIUM STRAINS AND PHOSPHORUS ON GROWTH OF SOYBEAN (GLYCINE MAX) AND SURVIVAL OF RHIZOBIUM AND P SOLUBILIZING BACTERIA *ZARRIN FATIMA, MUHAMMAD ZIA AND **M FAYYAZ CHAUDHARY
Abstract: Pot experiments were conducted to evaluate the effect of Rhizobium
leguminosarum strains (TAL-377, TAL-379 and TAL-102) alone and in
combination with Phosphorus on soybean. The parameters studied were
survival of Rhizobium at pod filling stage and after harvesting,
and root/ shoot dry and fresh weight of soybean under natural condition.
Surface stererilized soybean seeds var. NARC-4 were sown in earthen
pots filled with soil and sand 1:3. Phosphorus (P) was applied as single
super phosphate (SSP) at the time of sowing in the soil. Soybean seeds
were inoculated with Rhizobium strains as seed coating just before
sowing. The effect of growth was highly significant (a 0.05) with an
increase in root/shoot dry and fresh weight in plants with mixture of
Rhizobium inoculums with phosphorus on soybean. Among three strains
TAL-102 performed well as compared to TAL-377 and 379 Rhizobium strains.
The CFU count of Rhizobium and P solubilizing bacteria was found maximum
both at pod filling and after harvesting stage when Rhizobium
strains and P was applied in mixed culture. A mixture of effective strains
with phosphorus is a promising way for enhancing the growth of legume
crops.
Department Biological Sciences, Quaid-i-Azam University, Islamabad,
Pakistan. |
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