Growth response and nutrient uptake of blue pine (Pinus wallichiana) seedlings inoculated with rhizosphere microorganisms under temperate nursery conditions
2012
M.A. Ahangar | G.H. Dar | Z.A. Bhat
<span>Microbial inoculants (</span><em>Trichoderma harzianum, Pseudomonas fluorescens, Laccaria laccata</em><span>) inoculated either individually or in combination significantly improved the growth and biomass of blue pine seedlings. The ECM fungus </span><em>Laccaria laccata</em><span>, when inoculated individually, showed significantly higher plant growth, followed by </span><em>Pseudomonas fluorescens</em><span> and </span><em>Trichoderma harzianum</em><span>. The combined inoculation of rhizosphere microorganisms showed synergistic growth promoting action and proved superior in enhancing the growth of blue pine than individual inoculation. Co-inoculation of </span><em>L. laccata</em><span>with </span><em>P. fluorescens</em><span> resulted in higher ectomycorrhizal root colonization. Uptake of nutrients (N, P, K) was significantly improved by microbial inoculants, tested individually or in combination. Combined inoculation of </span><em>L. laccata</em><span> with </span><em>T. harzianum</em><span> and </span><em>P. fluorescens</em><span> significantly increased in N, P and K contents in blue pine seedlings as compared to control. Acid phosphatase activity in the rhizosphere of blue pine seedlings was also enhanced by these microorganisms. </span><em>L. laccata</em><span> exhibited higher acid phosphatase activity followed by </span><em>P. fluorescens</em><span>. </span>
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