Abstract:
The experiment was conducted at central farm of Sher-e-Bangla Agricultural
University, Dhaka-1207 during the period from November 2019 to April 2020 to
evaluate the seed yield and quality of onion as affected by planting time and nutrients.
The treatment consisted of two factors viz. Factor A: three planting time; (i) T
1
(1
November) (ii) T
2
(10 November) and (iii) T
3
(20 November) and Factor B: four
levels of nutrients; (i) N
0
(NPKS; standard dose), (ii) N
1
(50% NPKS + 50%
vermicompost), (iii) N
2
(50% NPKS + 50% mushroom spent compost) and (iv) N
3
(50% vermicompost + 50% mushroom spent compost). The experiment was
conducted in randomized complete block design (RCBD) with three replications. A
significant variation among the treatments was found while different planting time
and different levels of nutrients applied in different combinations. The highest number
of umbel per plant (3.25), number of seeds per umbel
(606.40), 1000 seed weight
(3.50 g), seed yield per plant (3.47 g), seed yield per plot (138.70 g) as well as seed
yield per ha (770.60 kg) was recorded from T
2
N
1
(10 November with 50% NPKS +
50% Vermicompost) whereas the lowest was from T
3
N
3
(20 November with 50%
Vermicompost + 50% Spent mushroom compost). Considering seed quality, all the
parameters were significantly affected by combined effect of different planting time
and different levels of nutrients. T
2
N
1
gave the highest seed germination (86.33%),
shoot length (9.67 cm), root length (4.56 cm) and seed vigor index (1228.00) whereas
T
3
N
3
(20 November with 50% vermicompost + 50% spent mushroom compost)
showed the lowest results. Considering results of the experiment, planting time at 10
November along with 50% NPKS + 50% Vermicompost are the best for producing
better yield and higher quality of onion seed.
keywords: quality seed, production, nutrients, vermicompost, mushroom spent
compost.
Description:
A Thesis
submitted to the Institute of Seed Technology
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
INSTITUTE OF SEED TECHNOLOGY