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Abstract:The aim of the study is to determine the effects of different plane of nutrition during late pregnancy to lactation on the performances of ewes and their offspring to weaning. About 36 native Bengal ewes of last 7 weeks gestation were randomly assigned to four different groups (T 0 , T 1 , T 2 , T 3 ). The T 0 , T 1 , T 2 and T 3 groups were supplemented a concentrate mixture at 0.0, 1.0, 1.5 and 2.0% of their body weight, respectively. Chopped German grass (Echinochloa polystachya) was provided as basal forages to ewes and a creep mixture (20 g/lamb/day) to the lambs from 2 weeks of age with a weakly increase of 10 g/lamb. The results shown that ewes dry matter intake (p < 0.01), milk yield (p < 0.05), days open (p < 0.01), live weight gain before lambing (p < 0.01) and at weaning (p < 0.01) and weight recovery from late gestation to weaning (p < 0.05) improved with high plane of nutrition. Higher weight recovery found in T 2 group. Litter size had an effect on (p < 0.01) all weight traits of lambs and ewes milk yield. Sex of lamb also affects (p < 0.05) the weaning weight and daily gain of lambs.

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A complete pellet feed was developed using 40 % roughage (Rice straw) and 60 % concentrate (Rice polish 50 %, Maize crush 16 %, Soybean meal 20 %, Molasses 10 %, Salt 2 %, DCP 1 %, Vitaminmineral premix 0.5 %, Pellet binder 0.5 %) for commercial sheep production under stall feeding system. To know the effect of complete pellet feed on animal performances, both on-station and on-farm trials were conducted in growing sheep. The results of the experiment demonstrated that in the traditional system of rearing; only 22.42 g daily weight gain was observed. While, feeding of complete pellet feed achieved 84.98 g, and 100.67 g daily weight gain at on-farm and on-station condition respectively suggesting that pelleting enhanced the efficiency of utilization of feed. However, no differences were observed for the feed cost per kg weight gain, feed conversion ratio (FCR) and benefit-cost ratio (BCR) among the pellet feeding group and other group. But results suggest that complete pellet feed would be more economical for commercial sheep production under the stall-fed condition and farmers would be more benefited using complete pellet feed compared to conventional grass or urea molasses straw (UMS) and concentrate based feeding system. No disease or clinical symptoms were observed in the animals during the experimental period, suggesting that pellet feeds are well accepted by the sheep and results in better growth rate. SAARC J. Agri., 18(2): 157-166 (2020)

The study was conducted to know the effect of different levels of pre and post-natal nutrition on the performances of ewes and their lambs until 1 year of age and the profitable slaughter age of lambs under semi intensive system. Twenty eight (28) native Bengal ewes at 7 weeks of gestation were randomly assigned to four groups (T0, T1, T2, T3) and supplemented with a concentrate mixture at 0.0, 1.0, 1.5, 2.0% of their body weight respectively. Ewes were allowed to graze 8 hours daily. Creep mixture (20 g/lamb/day) was provided to lambs from 2 weeks age with an increment of 10 g/lamb/week. After weaning, 20 growing male lambs were selected and reared 01 year of age with concentrate mixture at 1.5% of their body weight and 8 hours grazing irrespective of treatment groups. Parameters like, ewe’s litter size, daily milk yield, post-partum heat and lamb’s birth weight, weaning weight, live weight at 06, 09 and 12 months were recorded. The data were analyzed in an ANOVA with CRD by using SPSS v. 20. The mean differences were tested by DMRT at a probability level of P<0.05. After weaning, the lamb growths were analyzed considering age as fixed factor. Regression correlations among different parameters with different ages were also performed. Significantly higher daily milk yield (P<0.01), weaning weight (P<0.05) and daily weight gain of lamb until weaning (P<0.05) were observed in T2 group. Besides, lambs weight at 06, 09, and 12 months differ significantly (P<0.01) along with corresponding daily weight gain (P<0.05). Lambs daily weight gain did not differ significantly from weaning to 09 months of age but significantly reduced (P<0.05) from 09 to 12months age. Finally, it may be concluded that a concentrate diet containing 20% CP during late pregnancy to lactation should be supplied to obtain maximum performances of ewes and their lambs. Besides, native Bengal lamb would be slaughtered between 06 to 09 months of age to get maximum return. Bang. J. Livs. Res. Vol. 26 (1&2), 2019: P. 43-50

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A 2×3 factorial experiment was conducted to compare two cultivars; Bangladesh Livestock Research Institute developed Napier hybrid-3 (BN-3) (Pennisetum purpureum) and Pakchong-1 (Pennisetum purpureum× P. glaucum) in terms of forage growth, biomass yield, and nutritional quality. Cultivars were cultivated in 03 blocks with 03 replicates and were harvested at 03 cutting periods (40, 50, and 60 days). Plot sizes for each cultivar were 25 m2 (5m × 5m), and in every plot, twenty-five stem cuttings with two healthy nodes per cutting were planted with (1×1) m spacing. The effects of cultivar and cutting period were significant on plant height, leaves per tiller, leaf DM production, and leaf stem ratio (LSR). Highest plant height (P<0.01) and leaves per tiller (P<0.05) were consistently produced by BN-3, while Pakchong-1 produced the highest amount of CP (P<0.05), LSR (P<0.05), tiller diameter (P<0.01) and diameter of the lowest node (P<0.01). Based on the %DM, DM yield, and CP yield, BN-3 performed better cutting at 50 days after the first plantation, but Pakchong-1 performed better cutting at 60 days after the first plantation. From the forage standpoint, Pakchong-1 seems to have little advantages over BN-3 because of its higher DM, LSR, and CP production. Bang. J. Anim. Sci. 2021. 50 (1):43-49

Abstract:The research was conducted to determine the approximate fat in milk for good quality dahi production and to inform dahi manufacturers' about the acceptable level of milk fat to be used and also their economic benefit. Quality assessment tests were conducted on four different types of dahi prepared by adding different percentage of milk fat such as 3.5% (A), 4.0% (B), 4.5% (C) and 5.0% (D) respectively. All the samples were analyzed for organoleptic, chemical and microbiological qualities. The scores for smell and taste, body and texture, color and appearance, and total scores for four types of dahi samples showed significant differences at various levels (p<0.01 to p<0.05). It was found that scores for all the organoleptic parameters of sample C were the highest among the samples, whereas sample A obtained the lowest scores. Smell and taste, body and texture, total score, TS content, water content, fat content and coliform count were differed significantly (P<0.01). Color and appearance, protein content and % acidity also showed significant differences (P<0.05), though CHO content, ash content and pH value showed insignificant differences. It could be concluded that sample C (containing 4.5% milk fat) was the best in terms of physical, chemical and microbiological qualities.