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Asian Journal of Plant Sciences

Year: 2007 | Volume: 6 | Issue: 1 | Page No.: 77-82
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Authors

Esmaeil Yasari

A.M. Patwardhan

Keywords

Research Article

Effects of (Azotobacter and Azosprillium) Inoculants and Chemical Fertilizers on Growth and Productivity of Canola (Brassica napus L.)

Esmaeil Yasari and A.M. Patwardhan
To investigate the effects of inoculants (biofertilizer) and chemical fertilizer on the yield, yield components and seed oil content of canola (Brassica napus L.), a split-plot experimental design with 20 treatments in 4 replications was carried out during 2004-2005 growing season at the Baiecola Agricultural Research Station in the Mazandaran province, Iran. Canola (cv. Hyola 401 hybrid), a high yielding early maturity variety, was grown in rotation after wheat. In the main plots, the biofertilizer treatments were at two different levels: 1) control (no seed inoculation) and 2) seed-inoculation with a combination of three different strains of bacteria Azotobacter chrocooccum and Azosprillium brasilense and Azosprillium lipoferum. In the two sets of 10 sub-plots chemical fertilizers comprising N, P, K and their combinations, NPKS and NPK Zn were applied. The seed yield touched a high of 3741.5 kg h-1 at treatment T20 (Bio + NPK Zn), that corresponded to 257.7 pods per plant and maximum CGR (18.3 g m-2 day-1). The highest weight of 1000 seeds (4.45 g) was obtained at treatment no T19 (Bio + NPK S) which coincided with the maximum TDM (1155 g-2) and maximum LAI (5.06). The maximum branching (4.43 branches per plant) was obtained at treatment T20 (Bio + NPK Zn) showing a 46.2% increase over the control. The maximum oil content 47.73% was obtained at T16 (Bio + NK). The application of inoculation with Azotobacter and Azosprillium helped to increase the yield by 21.17% over the control, raised the number of pods per plant (16.05%), number of branches (11.78%), weight of 1000 grain (2.92%) and the oil content of seeds (1.73%) but decreased (-0.24%) the number of seeds per pod.
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