Abstract:
Integrated nutrient
management strategies involving chemical
and biologic fertilizer is a real challenge to
stop using the high rates of agrochemicals
and to enhance sustainability of crop
production. In order to study the effects of
livestock manure, chemical nitrogen, and
biologic (Azotobacter) fertilizers on yield
and yield components of wheat, an
agricultural experiment in the form of split
factorial design with three replications was
conducted in Elam region, Iran. The aim of
this research was assessment of the effects
of these fertilizers separately and in
integrated forms; and setting out the best
fertilizer mixture. The results showed that
treatment with livestock manure,
Azotobacter and chemical nitrogen
increased plant height, biological and grain
yield. Using livestock manure and
Azotobacter increased biologic yield
through increase in plant height which
cause to increase in grain yield without any
significant changes in harvest index and
other yield components, but the use of
chemical nitrogen caused an increase in
plant height, No. of spikelete/spike, No. of
grain/spike, one thousand grain weight and
harvest index, biologic and grain yield. In
the light of the results achieved, we may
conclude that using livestock manure and
chemical nitrogen fertilizer together with
the Azotobacter had the maximum impact
on yield; and that we can decrease use of
chemical fertilizers through using livestock
manure and biologic fertilizers and to reach
to the same yield when we use only
chemical fertilizers.
