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investigate the effect of different ratio of roughage further research areas, especially, on native cattle
and concentrate on growth and nutrient utilization.
The weather were divided into four groups and
randomly allocated into four diets in a completely
randomized design. The four diets were formulated
with the ratio of roughage and concentrate, 3.1 (T 1)
2.3:1(T 2), 1.8:1(T 3) and 1.5:l (T 4) by maintaining
almost same energy level.The total Dry Matter
(DM) and Organic Matter (OM) intake (g/d)
increased by raising the concentrate levels but the
differences were not significant (P>0.05). Crude
protein (CP) intake increased significantly
(P<0.()5) with the increasing the levels of
concentrate. The level of concentrate had no effect
on the digestibility of DM, OM, acid detergent
fiber (ADF) and neutral detergent fiber (NDF). The
highest daily live weight gain (110.50g) was
recorded in weather fed diet T 3 (1.8:1) followed by
T 4 (105.30 g). T 2(102.00 g) and T 1 (95.20 g). The
feed conversion efficiency (DMl/LWG), the
protein conversion efficiency (CPl/LWG) and
energetic efficiency (MJ MEl/LWG) increased by
raising concentrate level but difference among the
treatments (T 1, T 2, T 3, and T 4) were statistically
non significant (P>0.05). The growth rate and feed
conversion efficiency by weather fed T 3 diet was
higher than those fed on T 1, T 2 and T 4 respectively.
160 HAQUE, K.S. (Animal Production
Research Division, Bangladesh Livestock
Research Institute, Savar, Dhaka) & SULTANA,
N. (Goat and Sheep Production Research Division,
Bangladesh Livestock Research Institute, Savar,
Dhaka). REVIEW ON FEEDING, NUTRITION
AND GROWTH EFFICIENCY OF NATIVE
MALE CATTLE OF BANGLADESH, AND
COMPARISON WITH FEEDLOT BEEF
ANIMALS. Bang. J. Anim. Sci., 2007, 36 (1 & 2),
113-135.
This review focuses on data generated from
different growth trials conducted on native male
cattle both at farm levels; as well as research
stations of universities and institutes of
Bangladesh, and published in different forms since
1965. Evaluation of plane of nutrition and growth
performance of different types of native males,
comparison with that of feedlot beef cattle,
calculation of nutrient requirements for native
cattle for beef production; and identification of
45
for beef production were the major objectives of
the work. Three major types of diet were identified
based on the type of basal roughages used in
different feeding trials to evaluate growth
performances. These are i) dry straw (DS), ii) urea-
molasses-straw (UMS); or iii) grass silage based
diets. The nutritional quality of the three diets and
their effects on animals were analyzed using
computer softwares and interpreted mathematically
and statistically, and compared with the values
recommended for similar production planes by
Kearl (1982), ADAS (1991) or AFRC (1995).
Having being compared and interpreted; methods
of calculation of nutrient requirements for different
growth levels of cattle were suggested. The data so
far generated since formulation and development
of UMS diet at BLRl on its feeding response of
growing cattle qualify UMS as a basal fattening
diet, and ii was found better than feeding dry straw
diet. Analyses of available data on the live weight
(Kg) of native male cattle and their daily dry
matter intake, DMI (Kg/d) gave a significant
(p<0.05) linear relation (r = 0.72) and an equation
of DMI (Kg) = 2.2029 + O.O137x kg live weight
was found. Similarly analyses of MJ ME or crude
protein intake with live weight gain (g/day) of
native cattle gave significant (p<0.001) linear
relations [MJ ME intake = 19.816+0.0327X daily
gain (g), r = 0.68 & CP intake, g = 111.09+0.6993x
daily live weight gain, (g), r = 89]. The constant
term of the linear equation of MJ ME or crude
protein with daily gain would calculate
maintenance requirement of two nutrients,
respectively and their production allowances may
be calculated by multiplying the slope with daily
live weight gain (g) of native animals ranging from
50 to 300 kg. The average ratio of roughage
(mostly of straw) and concentrate (mostly of brans
and oil cakes) in the diets fed to native cattle was
78.4:21.6; and that of roughage (mostly of grass
silage) and concentrate (mostly of grains) of the
diets fed to feedlot beef cattle was 31:69.
Extrapolating the data, it was found that the native
cattle might yield growth similar to that of feedlot
beef cattle, if nutritional requirements are
adequately met with quality feeds.
161 KAMRUZZAMAN, M.; KHAN, M.J.
& SHAHJALAL, M. (Dept. of Animal
Nutrition, Bangladesh Agricultural University,