Publish in OALib Journal
APC: Only $99
The current study was conducted to assess the
effects of phosphorus supplementation and Bradyrhizobium
japonicum inoculation on the availability and uptake of N, P, K, Mg, Ca and
Na on cowpea. The experiment was laid out in a split plot design where the main
plots comprised two inoculation levels (with and without inoculation of B. japonicum ) and sub plots contained
four different levels of phosphorus (0, 20, 40, and 80 kg P/ha). The results
indicated that B. japonicum inoculation and phosphorus supplementation significantly improved the uptake of
N, P, K, Mg, Ca and Na in different cowpea tissues such as roots, pods, shoots,
and whole plant relative to the control. The results also indicated that there
was a significant interaction of B.
japonicum and phosphorus on the uptake of sodium in the roots and whole
cowpea plant in the screen house. Rhizobia inoculation and supplementation of
phosphorus at 40 kg P/ha resulted in the improved uptake of the most elements
over other treatments tested.
The field and screen
house experiments were carried out in the 2013 cropping season to assess the
effects of B. japonicum inoculation
and phosphorus supplementation on the uptake of micronutrients in the cowpea.
The experiment was laid out in a split plot design where the main plots
comprised two inoculation treatments (with and without B. japonicum inoculation) and sub plots included four different
levels of phosphorus (0, 20, 40, and 80 kg P/ha). The results showed a
significant improvement in the uptake of micronutrients in the B. japonicum inoculated treatments over
the control. Phosphorus supplementation (40 kg P/ha) also showed a significant
increase in the uptake of some micronutrients while decreasing the uptake of Zn
in some plant organs. There was also a significant interaction between B. japonicum inoculation and phosphorus
in the root uptake of Zn for the field experiment.