Effect of biofertilizers and inorganic fertilizers on growth and nutrient uptake in Acacia nilotica willd. ex Del. seedlings
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Date
2016
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Punjab Agricultural University, Ludhiana
Abstract
The vital importance of Acacia nilotica in afforestation programmes and lack of
information on quality seedlings production of this species encouraged to carry out the
present study. The investigation was conducted to generate information on effect of inorganic
and biofertilizers on growth performance and nutrient uptake in plants. The treatments
comprised of all possible thirty-six combinations of three levels of nitrogen (0, 30 and 60 kg
N ha-1), three levels of phosphorus (0, 75 and 150 kg P205 ha-1) and four biofertilizers levels
(No biofertilizer, VAM, Rhizobium and VAM + Rhizobium. The experiment was established
in factorial split design with nine combinations of N and P in the main-plot and four biofertilizer
levels in the sub plots with three replications. Inoculation with VAM and Rhizobium,
singly and dually. resulted in maximum growth and N and P uptake in shoot and root as
compared to uninoculated control. Among different doses of nitrogen and phosphorus, when
applied singly, 30 kg N and 75 kg P205 ha-1 produced maximum growth for most of
characters. Dual inoculation of VAM and Rhizobium supplemented with 30 kg N and 75 kg
P2O5 ha-1 significantly increased shoot and root length, collar diameter, shoot and root dry
weight, shoot fresh weight, number of nodules, nitrogen and phosphorus uptake by roots and
shoot. However, root fresh weight increased with dual inoculation of VAM and Rhizobium
supplemented with 30 kg N and 150 kg P2O5 ha-1. So, it was concluded that there is a great
potential of combining inorganic and bio-fertilizers for achieving higher growth of Acacia
nilotica plants.
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Keywords
Acacia nilotica, biofertilizers, nitrogen, phosphorus, VAM, Rhizobium