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|Title: ||Evaluation of microbial inoculants as biofertilizers for the improvement of growth and yield of soybean and maize crops in savanna soils|
|Authors: ||Laditi, M. A.|
Nwoke, O. C.
Abaidoo, R. C.
Ogunjobi, A. A.
Cereals and legumes
plant growth promoting rhizobacteria
|Issue Date: ||19-Jan-2012|
|Publisher: ||African Journal of Agricultural Research|
|Citation: ||African Journal of Agricultural Research Vol. 7(3), pp. 405-413, 19 January, 2012|
|Abstract: ||Certain rhizobacteria exert considerable influence on plant growth and development, particularly under
limiting conditions. The effects of some indigenous soil microbial isolates and commercially produced
microbial inoculants, referred to as bio-inoculants, on the growth and dry matter yield (DMY) of maize
(Zea mays) and soybean (Glycine max) crops were assessed under greenhouse conditions. In two sets
of experiments, one set comprised of free-living nitrogen-fixing microorganisms (Azospirillum spp.),
three soils from Ibadan, Mokwa and Shanono located in different agro-ecological zones, and maize as
the test crop. The other set consisted of microbial inoculants that can act as biocontrol agents applied
to sterilized and non-sterilized soils; soybean was the test crop. The bio-inoculants were applied
separately and also in combination. The treatments included a reference termed ‘mineral N’ where
macro- and micro-nutrients were supplied at optimal rates, a control where bio-inoculants were not
applied, and four replicates. All treatments, excluding the reference, received only macro-nutrients at
suboptimal rates. The crops were grown for eight weeks and growth parameters were measured. The
shoot DMY of maize was relatively large (42 to 63 g plant-1) and differed significantly among the soils
but the bio-inoculants did not improve the shoot DMY significantly (P > 0.05) in any of the soils when
compared with the control. However, sole inoculation of Mazospiriflo-2 enhanced nitrogen uptake
significantly in maize grown in Shanono soil. For soybean, the shoot DMY was also not improved by the
inoculation or the addition of the microbial products compared with the control.|
|Description: ||An article published by African Journal of Agricultural Research Vol. 7(3), pp. 405-413, 19 January, 2012|
|Appears in Collections:||College of Science|
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