INFLUENCE OF BIOSTIMULANTS WITH REDUCED RATE OF CHEMICAL FERTILIZATION AND DEHAULMING SCHEDULE ON POTATO
Date
2020
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
DEPARTMENT OF HORTICULTURE
Abstract
The experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural
University, Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh to find out the effect of
biostimulants with reduced rate of chemical fertilization and dehaulming schedule on
potato during the period from November, 2019 to March, 2020. The variety BARI Alu25
(Asterix)
was
used
in
the
experiment
as
the
test
crop.
The
experiment
consisted
of
two
factors:
Factor
A:
biostimulants
with
reduced
rate
of
chemical
fertilizer
viz.
M
1
=
6 t ha
-1
vermicompost, M
2
= Recommended NPK, M
3
= 90% NPK+ Trichoderma 4 kg
ha
-1
, M
4
= 80% NPK+ Trichoderma 8 kg ha
-1
.
B: different days of dehaulming I
1
= 65
Days after planting, I
2
= 75 Days after planting, I
3
= 85 Days after planting. There were
12 treatment combinations and experiment was setup in Randomized Complete Block
Design (RCBD) with three replications. The result indicated significant variations in
number of tubers per hill, weight of tubers per hill, mean tuber weight, yield of tuber
per hill, yield of tuber (t ha
-1
), marketable yield, non-marketable yield (t ha
), grade of
tuber by number, total soluble solids, firmness, starch percentage, dry matter, water
percentage, skin color of potato due to biostimulants with reduced rate of chemical
fertilization and/or different days of dehaulming. Results also revealed that, the highest
yield contributing characters and tuber quality attributes were obtained from 80%
NPK+ Trichoderma 8 kg ha
-1
(M
4
) treatment. Different days of dehaulming
significantly influenced the quality attributes of potato but had non-significant variation
on yield contributing characters. The highest tuber yield and quality characters were
obtained from dehaulming at 85 days. Among the treatment combination, M
4
(80%
NPK+ Trichoderma 8 kg ha
-1
and dehaulming at 85 days) treatment seemed to be more
promising for obtaining higher tuber yield (26.63 t ha
-1
), total soluble solids (6.68),
firmness (46.65), starch content (22.38%), dry matter (35.74%) than other treatment
combination. Hence, we can summarized that 80% NPK+ Trichoderma 8 kg ha
and
dehaulming at 85 days given the maximum output in terms of yield and quality
contributing characters compared to other treatments.
Description
A Thesis
Submitted to the Department of Horticulture, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka in partial
fulfillment of the requirement for the degree of
MASTER OF SCIENCE (MS)
IN
HORTICULTURE
Keywords
BIOSTIMULANTS, DEHAULMING SCHEDULE ON POTATO