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erformance of rice hybrids grown by system of rice intensification (SRI) with plant growth promoting rhizobacteria (PGPR
Ram Lal Choudhary
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.
Krishikosh Institutional Repository