erformance of rice hybrids grown by system of rice intensification (SRI) with plant growth promoting rhizobacteria (PGPR
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Date
2008
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Abstract
The field
experiment entitled
“Performance of rice hybrids grown by system of
rice intensification (SRI) with plant growth
promoting rhizobacteria”
was conducted
in
a sandy clay
-
loam soil (Main Block 14C) at Indian Agricultural Research Institute, New
Delhi
–
12, India
during
kharif
season of 2007.
The objectives of the study were:
To
evaluate the agronomic performance of di
fferent rice hybrids grown by system of rice
intensification (SRI), and to study the effect of plant growth promoting rhizobacteria
(PGPR) on productivity and nutrient uptake of rice hybrids. The treatments (18)
comprised of combination of 6 rice hybrids
(KRH 2, Arize 6444, PHB 71, Indam 100
-
001, PRH 10 and Indam 100
-
003), and 3 kinds of plant growth promoting rhizobacteria
(Non
-
inoculated control,
Azospirillum brasilense
CD4 and
Bacillus subtilis
RP24).
Treatments were laid out in a Factorial Randomized B
lock Design with three
replications.
Results of this trial indicate that t
he highest grain yield was obtained in
KRH 2, being at par to Arize 6444 and PHB 71, but significantly higher than that
obtained in Indam 100
-
003, PRH 10 and Indam 100
-
001. The lowes
t grain yield of rice
was recorded with Indam 100
-
001, which was significantly lower than all the other 5
hybrids. Rice hybrids KRH 2, Arize 6444 and PHB 71 produced 74.7%, 65.5% and
56.0% more grain yield, respectively over Indam 100
-
001.
Although, inocul
ation of rice
with
Bacillus subtilis
did not increase the grain yield significantly over control, but
inoculation with
Azospirillum brasilense
increased the grain yield of rice significantly
over both control (non
-
inoculated) and
Bacillus subtilis
inoculat
ion. The increase in
grain yield due to inoculation of
Azospirillum brasilense
over control and
Bacillus
subtilis
inoculation was to the tune of 15.2% and 15.8%, respectively.
Description
t-7950