Abstract
The present study was carried out to assess the effect of concentrate on growth performances of both male and female lamb. For this purpose twenty four (12 male and 12 female) lamb aged about 5-6 months were selected and divided into three groups (Treatment group T1, T2 and control group T0). In each group having 4 males and 4 females lamb, all lambs were supplied green roughages ad-libitum, control group T0 was allowed no concentrate and treatment group T1 & T2 were supplied 100 gm & 200 gm concentrate mixture respectively for 90 days experimental period. Animals were weighed at 15 days interval. Significant differences of live weight gain among these three groups were found. Allowing 100 gm (T1) concentrate mixture along with green grass improved growth rate in both male and female lamb. Increasing of concentrate supplementation improved live weight gain (found in T2 group). Total live weight gain (kg) and average daily live weight gain (g/d) were 4.25±0.52 kg and 47.20±5.75 g, 5.38±0.83 kg and 59.73+9.17 g and 7.00±0.54 kg and 77.78±6.00 g in male lambs and 2.25±0.21 kg and 25.00±2.34 g, 3.18±0.32 kg and 35.39±3.63 g and 3.81±0.24 kg and 42.33±2.77 g in female lambs for the To, T1 and T2 groups respectively. Live weight was significantly (P<0.05) higher in male than female lambs. The results showed that 100 g concentrate supplementation with green roughages improved growth rate in lambs (male and female) under stall feeding condition. Increase of supplementation might improve nutrients supply to promote higher live weight gain.Asian J. Med. Biol. Res. June 2016, 2(2): 274-278
Highlights
Livestock plays a potential role in the national economy of Bangladesh
The cumulative live weight gain observed during the experimental period is shown in Figure 1 in case of male lambs and Figure 2 in case of female lambs
The findings were similar to the reports of Mazumder (1996) who indicated that average daily live weight gain (LWG) were 15.71 g, 22.66 g, 32.60 g and 40.47 g for the treatment groups treatment. Control group (To) T1 (100gm concentrate), T2 (200gm concentrate) and T3 (300gm concentrate) respectively
Summary
Livestock plays a potential role in the national economy of Bangladesh. Among the livestock, sheep population is the lowest in Bangladesh. Sheep mainly thrives on natural grasses available on the fallow land, roadsides, crop field, ridges and canal sites These feed resources are characterized by low digestibility, low energy and low protein content into deficient in the minerals and vitamins (Pandit, 2005; Minson, 1967). In scavenging type of rearing, a small amount of concentrate may be supplemented to increase the productivity of sheep at the minimum cost. Keeping this view in mind, the present experiment was undertaken with the following objectives: (a) To study the effect of supplementing different levels of concentrate on growth performance of both male and female lamb. Keeping this view in mind, the present experiment was undertaken with the following objectives: (a) To study the effect of supplementing different levels of concentrate on growth performance of both male and female lamb. (b) Comparative growth performance of male and female lamb with different level of concentrate along with adlibitum green grasses. (c) To determine the optimum level of concentrate supplementation with the natural grasses for meeting the nutrient requirement for sheep
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