Abstract:
The experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka-1207
during the period from September 2022 to February 2023 to examine the influence of
vermicompost, trichocompost and compost on growth and yield of onion. The
experiment consisted of 8 treatments viz. T
(RDF; recommended doses of fertilizers
= cowdung; 5 t ha
-1
+ urea; 150 kg ha
-1
1
+ TSP; 175 kg ha
IX
-1
+ MoP; 200 kg ha
+
gypsum; 110 kg ha
-1
+ ZnO; 3 kg ha
-1
), T
2
(100% vermicompost; 10 t ha
(100%
trichocompost; 8 t ha
-1
), T
4
(100% compost; 12 t ha
-1
), T
5
-1
), T
(50% vermicompost
+ 50%
trichocompost), T
6
(50% vermicompost
+ 50% compost), T
7
3
(50% trichocompost
+
50% compost) and T
8
(33% vermicompost
+33% trichocompost
+ 33% compost). The
experiment was conducted in randomized complete block design (RCBD) with three
replications. A significant variation among the treatments was found. The highest
plant height (64.52 cm) was recorded from the treatment T
(RDF; recommended
doses of fertilizers) while the highest number of leaves plant
1
-1
(18.75) was recorded
from the treatment T
. Similarly, the highest neck diameter (13.20 mm), bulb length
(5.57 cm), bulb diameter (4.85 cm), fresh weight of bulb plant
8
-1
(59.07 g), dry weight
bulb
-1
(14.37%), yield plot
-1
(2543.00 g) and yield ha
-1
(21.19 t) were recorded from
T
8
treatment followed by T
5
whereas the treatment T
gave the lowest performance for
the respected parameters. Again, the treatment T
8
3
also showed the highest gross return
(Tk. 529750.00 ha
-1
), net return (Tk. 326425.00 ha
-1
) and BCR (2.61) whereas the
lowest gross return (Tk. 375000.00 ha
-1
), net return (Tk. 167416.00 ha
) and BCR
(1.81) were recorded from T
(33% vermicompost; 3.33 t ha
3
-1
treatment. Considering results of the experiment, T
-1
+33% trichocompost; 3.66 t ha
-1
+ 33% compost; 4 t
ha
-1
) was the best treatment for producing greater onion bulb yield and monetary
return.
Description:
A Thesis
Submitted to Department of Entomology,
Faculty of Agriculture.
Sher-e-Bangla Agricultural University,
Dhaka-
In partial fulfillment of the requirements for the degree of
MASTERS OF SCIENCE (MS)
IN
DEPARTMENT OF HORTICULTURE
