Abstract:
A held experiment was conducted at Sher-e-Rangla Agricultural University Farm.
Dhaka 1207 during the Rabi season of 2007-2008 to study the eflect of combined
application of inorganic fertilizers and vermicompost on growth. yield, chemical
composition and oil content of rapeseed
(Brassicci campesiris
var. SAU Sharisha- I).
The experimental soil was clay loam in texture having pH of 6.2. The treatments used
were 4 levels of each of vermieomposts viz. V
0 (01 ha"), V
1 (2 t ha"). V
2 (4 t ha1),V3
(6 t ha") and chemical fertilizers (N. P. K. S.
Zn.
B) vit F0= ( 0-0-0- 0-0-0kg
ha" ). F, = low fertilizer (45 - 15-20 - 12 -. 1.5 - 1.0 kg ha
1
), F
2
medium
fertilizer (90-30-40 25 -. 3 -2 kg ha"), F
3 high fertilizer (135-45
-60-40
- 4.5 -- 3.0 kg ha
4
) in 16 treatment combinations with
3 replications. The resulls
demonstrated that the increasing doses of vermicompost and chemical fertilizers
increased grain and straw yields of rapeseed significantly. The maximum significant
grain yi
eld was obtained with the treatment combination. V
2F2 and that of straw yield
was obtained with the treatment combination. V
3F3. The highest doses of
vermicompost and chemical fertilizers increased N. P. K. and S concentrations in
rapeseed plant significantly and also enhanced N, P, K and S uptake significantly at
the harvesting stage. The maximum significant N. P and K uptake by rapeseed grain
were obtained with the treatment combination, V
2F2
and S uptake was obtained with
the treatment combination, V
3F3
. Application of chemical fertilizers failed to increase
organic matter content of post harvest soil, whereas vennicomposts showed a
significant positive efiCet. Vermicompost and chemical fertilizers increased P. S and
Zn. B status significantly and that of N and K appreciably in the soil under study. The
oil content was not significantly influenced by the different treatments.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-c-Bangla Agricultural University, Uhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
SOIL SCIENCE
SEMESTER JANUARY-JUNE 2098.
