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VOL. 7, ISSUE 4 (2025)
Effect of organic and inorganic sources of plant nutrients on changes of microbial population in the soil under incubation in different days of intervals
Authors
Chandan Pal, Kedar Nath Rai, Trilok Nath Rai, Sanjeev Kumar Rai, Jyoti Rai
Abstract
An investigation was carried out to study the
“Effect of organic and inorganic sources of plant nutrients on changes of
microbial population in the soil under incubation in different days of intervals”
under incubation in the Department of Soil Science and
Agricultural Chemistry, KNIPSS, Sultanpur, Uttar-pradesh. The experiment
was laid out in Completely Randomized Block Design with twelve treatments
replicated three times. N, P, K were applied through urea, single super
phosphate and muriate of potash, respectively. While the total amount of
organics was applied 15 days before incubation study. The effect of recommended
doses of fertilizers in addition to organic manures of different sources equivalent
N ha-1 and with their sole treatments on microbial population under
incubation have shown significant variations over control (T1).
Microbial population of the experiment under incubation as bacterial population
g-1soil x105, control (T1) treatment was show
lowest at different days of incubation. There was an increase in microbial
population of other treatments due to addition of organic and inorganic sources
of nutrients at each days of incubation. Addition of fertilizers and manures
either in combination or in alone has significantly shown as increase in
bacterial population over control (T1). The highest and lowest
bacterial population was recorded at 45 and 0- days of incubation; whereas the
treatments receiving 100% N through FYM were showed maximum population of
bacteria through out experimentation periods. The at par values were observed
in the treatments of T3 to T7 and T8 to T12
except T8 and T12 treatments at different days of
incubation. All the treatments show superiority over initial value of bacterial
population through out incubation periods. The population of fungi was maximum
and minimum observed at 25 and 0- days of incubation due to different
treatments under different periods of incubation. Incorporation of nitrogen
through alone organic treatments (T8 to T12) increased
significant fungal population over control (T1). Similar, to the
population of bacteria; fungal pupulation has also showed maximum and minimum
population in the treatments of 100% N through FYM (T8) and control
(T1) respectively, through out the experimentation periods under
incubation study. Among the treated conditions alone nitrogen through organic
sources given better response over other treatments under incubation at
different days. Most of the values were at par with each other in the treatment
of integrated approaches (T3 to T7) and organic alone
treatments (T8 to T12) in respective days of incubation.
Declined trend was started from 45 days of incubation in all the treatments in
fungal population over 25 days of incubation. Application of N through organic
manures / wastes alone treatment (T8 to T12) were
recorded maximum population of actinomycetes over other treatment under
incubation study at different days. Similar, to the population of bacteria and
fungi the highest and lowest population of actinomycetes were recorded in the
treatments receiving FYM alone (T8) and control (T1),
respectively at different days of incubation. Among the different days of
incubation, the maximum and minimum values were observed at 25 and 0- days
respectively. Most of the values were at par with each other in the treatment T3
to T7 and T8 to T12; except T8 and
T10.
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Pages:63-70
How to cite this article:
Chandan Pal, Kedar Nath Rai, Trilok Nath Rai, Sanjeev Kumar Rai, Jyoti Rai "Effect of organic and inorganic sources of plant nutrients on changes of microbial population in the soil under incubation in different days of intervals". International Journal of Agriculture and Plant Science, Vol 7, Issue 4, 2025, Pages 63-70
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