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by
Z.H. Khandaker |
Total Records (
2 ) for
Z.H. Khandaker |
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B. Sarkar
,
S.S. Islam
,
Z.H. Khandaker
,
S.M.E. Ershad
,
A. Ashraf
and
M.H. Rashid
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The study was conducted in the Department of Animal Nutrition, Bangladesh Agricultural
University with an aim to assess the degradability of crude protein (CP) and
crude fibre (CF) of Jumbo grass grown in four different doses of nitrogen (N)
fertilizer. The four doses of N fertilizer were 0, 50, 100 and 150 kg urea ha
1 in a Completely Randomized Design having four replications in each
treatment. The unit plot size of each replicate was 4x4 m2. The fodder
was harvested at the pre flowering stage at 68 days after sowing for first cutting.
Four adult male cattle of about 170 kg live weight and about four years of age,
fitted with permanent rumen canula, were used for the experiment. Approximately
3 g of each ground sample was placed in nylon bag separately for ruminal incubation.
The size of the bag was 7x5 cm2 with pore size of 60 μ m. The bags
with samples were incubated for the period of 2, 6, 12, 24, 48 and 72 h in the
rumen. The bags with contents were removed from rumen and dried in an oven at
100 ° C for complete removal of moisture. The residues were analyzed for crude
protein (CP) and crude fibre (CF) estimation. The disappearance values were
obtained by difference in weight of the sample before and after incubation.
From the percentage of disappearance data, the degradation characteristics were
calculated by using the NAWAY computer programme. The results of the study showed
that the effective degradability of crude protein (EDCP) of the fodder increased
by increasing the N fertilizer doses while effective degradability of crude
fibre (EDCF) remain unchanged. Due to fertilization the values of potential
degradable fractions ‘(a+b) ’ decreases for CF and this value remain unchanged
for CP. Rate constant (c value) was increased due to N fertilizer for both CP
and CF. |
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B. Sarkar
,
S.S. Islam
,
Z.H. Khandaker
,
S.M.E. Ershad
,
A. Ashraf
and
M.I. Hossain
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The experiment was carried out at the Department of Animal Nutrition, Bangladesh
Agricultural University, Mymensingh, to study the effects of different doses
of nitrogen (N) fertilizer on yields and chemical composition of Zamboo grass.
The fodder was cultivated at 4 levels of N fertilizer viz., 0, 50, 100 and 150
kg urea ha-1 in a completely randomized design having four replications
in each treatment. The unit plot size of each replicate was 4×4 m. The
fodder was harvested at the pre flowering stage (68 days after sowing) for first
cutting and again 40 days after first cutting. The proximate components of the
fodder for each plot were determined at the laboratory, Department of Animal
Nutrition. The results of the study showed that the total yields (t ha-1)
of Zamboo grass on fresh basis were 11.08, 15.63, 22.35 and 26.72 in the first
cuttings and 7.94, 12.24, 16.65 and 22.41 in the second cutting using 0, 50,
100 and 150 kg urea ha-1, respectively. The total dry matter (DM)
yield of fodder for first cutting at the treatment levels of 0, 50, 100 and
150 kg urea ha-1 were found to be 1.85, 2.75, 3.66 and 4.60 t ha-1 and those in second cutting were 0.67, 2.13, 3.08 and 3.97 t ha-1, respectively. Total yields of fodder green as well as DM basis
in both cutting progressively and significantly increased with the increasing
levels of N fertilizer doses. Similarly crude protein (CP), crude fiber (CF)
and ether extract (EE) yields (t ha-1) were increased with increasing
fertilizer doses. The green fodder as well as DM yields and percent of different
proximate components of each treatment were higher in the first cutting than
that of the second cutting except CF. The DM percent of the fodder was almost
similar for different fertilizer treatments in both cutting. Among the various
proximate components, CP, CF and EE percent increased by increasing the N fertilizer
doses while ash percentage decreased. |
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