Abstract:
The experiment was conducted at experimental plot of Agronomy farm of Sher-eBangla
Agricultural University, Dhaka with a view to finding out the optimum dose
of Nitrogen and Sulphur for maximizing the growth and yield of Black gram and their
interactions on of Nitrogen and Sulphur fertilization for proper growth and yield of
Black gram. The experiment consisted of treatment N
0
(no nitrogen) N
(nitrogen @
10 kg ha
-1
) N
2
(nitrogen @ 20 kg ha
-1
) N
3
(nitrogen @ 30 kg ha
-1
) and S
(no sulphur),
S
1
(sulphur @ 5 kg ha
-1
), S
2
(sulphur @ 10 kg ha
-1
). The experiment was laid out in a
two factor randomized complete block design with three replications. Growth
characters, yield contributing characters and yield of blackgram were significantly
influenced by nitrogen, sulphur and their interaction. At vegetative growth stage,
application of nitrogen @ 30 kg ha
-1
combined with sulphur @ 10 kg ha
produced
the highest plant height (34.00 cm), number of leaves plant
-1
(28.28), dry matter
weight (23.12 g) and number of branches plant
-1
(6.15) at harvest. The highest number
of pods plant
-1
(64.80), number of seeds pod
-1
(5.46), pod length (4.52 cm), 1000-seed
weight (36.49 g), seed yield (1.68 t ha
-1
), stover yield (2.03 t ha
-1
), biological yield
(3.71 t ha
-1
) and harvest index (45.39 %) were found in nitrogen @ 10 kg ha
. The
highest seed yield (1.68 t ha
-1
) was obtained in nitrogen @ 30 kg ha
and the lowest
seed yield (.81 t ha
-1
) was obtained in no nitrogen application. The application sulphur
@ 10 kg ha
-1
-1
showed superiority in terms of the highest number of pods plant
(54.75), number of seeds pod
-1
(5.13), pod length (4.05 cm), 1000-seed weight (33.87
g), seed yield (1.40 t ha
-1
), stover yield (1.80 t ha
-1
1
0
), biological yield (3.20 t ha
) and
harvest index (43.51 %). In case of interaction, the highest seed yield (1.81 t ha
) was
recorded in nitrogen @ 30 kg ha
-1
when combined with sulphur @ 10 kg ha
. It can
be concluded that the nitrogen @ 30 kg ha
-1
appears to be promising fertilizer in terms
of seed yield when combined with sulphur @ 10 kg ha
-1
.
