Abstract:
Addition of soil amendments and side-dressing of fertilizers is very crucial to
provide soil optimal for healthy growth and higher yield of sweet potato. Therefore,
the present experiment was conducted at the Sher-e-Bangla Agricultural University
Farm, Dhaka-1207 during May 2018 to April 2019 to observe the yield performance
of sweet potato varieties as well as to optimize fertilizer dose for sweet potato
cultivation. In this experiment four sweet potato varieties (three exotic and one local)
viz., Annoh-Beni, Annoh-Kogane, Kokei, BARI Sweet potato12, and three fertilizer
doses viz., control (no chemical fertilizer and no compost), BARI recommended
fertilizer dose and maruhisa (chemical fertilizer + improved compost) were included
as treatments following randomized complete block design with three replications.
Morpho-physiological characters, yield attributes and yield of sweet potato were
significantly influenced by variety and fertilizer doses. At vegetative growth stages,
the highest plant height (186.60 cm) was found in 100 DAP in BARI Sweet potato 12
with BARI recommended fertilizer doses. Whereas, the highest number of branch
plant
-1
(7.40), number of leaves plant
-1
(118.60) were found in BARI Sweet potato 12
with maruhisa (chemical fertilizer
+
improved compost). The highest tuber length
(20.61cm), tuber plant
-1
(.97 kg), and yield (32.55 t ha
iii
-1
) were recorded from the
treatment Kokei with maruhisa (Chemical fertilizer
+
improved compost). While the
highest tuber diameter (17.75) was found in BARI Sweet potato 12 with BARI
recommended fertilizer dose. The lowest value of tuber length (9.48 cm), tuber plant
1
(), and yield (6.86 t ha
-1
) were recorded from the treatment Annoh-Kogane in control
condition. The highest dry weight (39.33) was recorded in the combination AnnohKogane
with maruhisa (Chemical fertilizer
+
improved compost), and the lowest
(32.66) one in BARI Sweet potato 12 in control condition. The highest TSS (14.26 %)
was found in Kokei in control treatment, and the lowest (11.56 %) one in Annohkogane
in BARI recommended dose. Both on the results, Kokei with maruhisa
(Chemical fertilizer
+
improved compost) was the best fertilizer dose in term of yield
attribute and yield of sweet potato
Description:
A Thesis Submitted to
The Department of Agricultural Botany, Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In Partial fulfillment of the requirements
for the degree
of
MASTER OF SCIENCE (MS) IN
AGRICULTURAL BOTANY
SEMESTER: JANUARY-JUNE, 2020
