Abstract:
In Bangladesh sweet potato (Ipomoea batatas L.) is one of the important vegetables
not only for its high market demand but also its high nutritious value. Present study
was conducted to evaluate the effect of fertilizers on the yield of sweet potato at
farmer’s level in Bogura, Bangladesh. The experiment was carried out in Randomized
Complete Block Design with twelve treatment combinations of four varieties (V
1
:
Annou Beni, V
2
: Annou Kougane, V
3
: Kokei and V
4
: BARI Misty Alu-12) and three
fertilizer application (T
0
: No chemical fertilizer and no compost, T
1
: BARI fertilizer
dose, and T
2
: Maruhisa dose (Chemical fertilizer + improved compost)) replicated
thrice. The results of the study showed that V
4
variety and T
2
fertilizer dose had
significant effect on growth and yield parameters. Vine length, leaf number per plant
and branch per plant were higher in V
4
variety (vine length 23.91cm, leaf number per
plant 27.33 and number of branches per plant 6.77 respectively) and in T
2
fertilizer
application, and V
4
T
2
treatment. The highest vine length, number of leaf and number
of branches per plant were shown during 100 days in V
4
T
2
treatment. The result
indicates that V
2
T
2
produced highest tuber length (16.67cm). The result also indicated
that V
4
T
2
(V
4
variety treated with T
2
fertilizer) produced significantly highest tuber
diameter (20.13) and V
3
T
2
shows highest tuber weight (1.19 kg) per plant and tuber
yield of 18.61 t/ha. The yield analysis result revealed that maximum yield of sweet
potato was obtained from the application of T
2
fertilizer on V
3
variety than other
varieties. Considering the above all fact, it appears that using T
2
: Maruhisa fertilizer
and V
3
(Khokei) had a positive impact on growth and tuber yield of sweet potato.
Description:
A Thesis
Submitted to the Department of Agricultural Botany
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
AGRICULTURAL BOTANY
