Abstract:
An experiment was conducted at Sher-e-Bangla Agricultural University Farm
Dhaka, Bangladesh to study the effect of organic and inorganic fertilizers on
growth and yield of soybean (Glycine max L.) during the period from November
2021 to March 2022 (Rabi season). The experiment was laid out in randomized
complete block design (RCBD) with seven organic and inorganic fertilizer
treatments i.e. T
1
: 100% RCF (Recommended chemical fertilizer) + 0 t ha
vermicompost, T
2
: 75% RCF + 2 t ha
-1
vermicompost, T
3
: 75% RCF + 3 t ha
vermicompost, T
4
: 75% RCF + 4 t ha
-1
vermicompost, T
5
: 50% RCF + 2 t ha
vermicompost, T
6
: 50% RCF + 3 t ha
-1
vermicompost and T
: 50% RCF + 4 t
ha
-1
7
vermicompost. For the purpose of evaluating the experimental outcomes, data
on various parameters were statistically analyzed for evaluation of the different
treatment effects. Experimental result revealed that the highest number of
branches plant
-1
(3.46), fresh weight plant
-1
(10.60 g), number of pods plant
(27.53), pod length (4.21 cm), seeds pod
-1
(3.97), 1000-seed weight (115.67 g),
seed yield (1.86 t ha
-1
), stover yield (2.17 t ha
-1
), biological yield (4.03 t ha
) and
harvest index (46.15 %). were found in T
treatment. On the other hand, the
lowest value of these properties were obtained in T
4
(100% RCF) treatment. Soil
pH, organic matter content, N, P, K, S of post harvest soil at surface (0-15 cm)
layer, varied significantly amon different treatments. The highest pH in post
harvest soil of soybean (6.27), organic matter content (1.86 %), total nitrogen
content (0.069 %), available phosphorus (30.07 ppm), available potassium (0.171
meq/100 g soil) and available sulphur (17.66 ppm) were recorded with T
1
(75%
RCF + 4 t ha
-1
vermicompost) treatment whereas the lowest value were found in
T
treatment. Therefore, based on the above findings, it could be conclude that the
use of vermicompost not only reduce the recommended doses of inorganic
fertilizer but also improves the soil physico chemical properties and availability of
nutrients in soil in the long run sustaining the soil productivity and improve
growth and yield of soybean.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the
requirements for the degree of
MASTER OF SCIENCE
IN
SOIL SCIENCE
