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Feeding Effect of Concentrate Supplementation on Growth and Reproductive Performance of Growing Lamb

Md. Zillur Rahman
Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

Md. Yousuf Ali
Corresponding author:
Bangladesh Livestock Research Institute, Regional Station, Shahjadpur, Sirajgonj, Bangladesh

M.O. Goni
Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

M. Ershaduzzaman
Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh

Most. Sumona Akter
Central Cattle Breeding and Dairy Farm, Savar, Dhaka-1341, Bangladesh

Abstract/ Executive Summary:

Research work was undertaken to evaluate the feeding effect of concentrate supplementation on growth and reproductive performance of growing lamb upto first lambing. The trial was conducted at Char-elahi union, Chompanygonj, Noakhali. Thirty female sheep of about average 11.3 (±2.3) kg live weight and about 6-8 months of age were used and randomly allocated into three experimental diets, T0 (grazing), T1 (grazing + 1% concentrate supplement of live weight) and T2 (grazing + 2% concentrate supplement of live weight). The study revealed that the average daily DM intake was 261.00, 405.35 and 405.35g for diets T0, T1 and T2, respectively which was significantly (P≤0.01) different. DM intake when expressed as metabolic body weight also showed significant (P≤0.01) differences.DM intake as percent of live weight were 1.96, 2.81 and 3.69 for diets T0, T1 and T2, respectively, which differ significantly (P≤0.05) among the treatment group. Daily grass DM intake was 261.00, 260.49 and 260.38g for diets T0, T1 and T2, respectively and this difference was not significant (P≥0.01) among the treatment group. Daily average live weight gain was 20.00, 35.50 and 44.00g for diets T0, T1 and T2, respectively. Live weight gain on diet T2 was significantly (P≤0.01) higher than that of diet T1 and T0. The results suggested that concentrate supplementation had a higher growth response possibly due to better nutrient contents and their utilization. There was no significant (P≥0.01) effect on reproductive performances of service per conception, gestation length (d) and litter size (no.) of three dietary treatments. The Percentage of born alive T2 (100%) and T1 (90%) were higher in the supplemented group compared to non supplemented T0 (70%) group. Birth weight of lambs of T2 (male-1.41kg, female, 1.06 kg) and T1 (male-1.21 kg, female-0.90 kg) group were significantly (P≤0.05) higher compared to that on only grazing group T0 (male-0.72 kg, female0.56kg). The concentrate supplementation (2%) may be suggested for optimizing the growth and reproductive performance of female sheep under grazing conditions in the coastal areas.

Keywords: Growing lamb, Concentrate, Growth, Reproductive performance

Location: In Bangladesh

Start Date: 15-11-2010

End Date: 15-05-2011

Program Area: Animal Health and Management

Commodity: Sheep, Feed

Objectives:

To aim at predicting the effect of graded level of concentrate supplementation on feed intake, growth and reproductive performance of growing lamb in the field condition of the coastal area.

Methodology:

Site of the experiment: The trial was conducted at Char-elahi union, Chompanygonj, Noakhali during the period from Nov. 15, 2010 to May 15, 2011. This region has a subtropical humid climate with an average annual average temperature ranges from a maximum of 34.3 °C to a minimum of 14.4 °C; its annual rainfall is 3302 mm. (http://en. wikipedia.org/wiki/Noakhali). Animals grouping and housing: Thirty female lamb of average 11.3 (±2.3) kg live weight and about 6-8 months of age were selected and randomly allocated into three experimental groups, T0 (grazing), T1 (grazing + 1% concentrate supplement of LW) and T2 (grazing + 2% concentrate supplement of LW). The animals were ear-tagged and allowed for 10 days to adapt to the experimental conditions prior to the onset of the study. Faeces of each sheep was examined initially for checking internal parasitic infestation and all animals were dewormed with Helmex anthelmintic drugs immediately before starting of the trial. Following adaptation, sheep were housed in individual pens in an animal house subjected to adequate natural ventilation and sunlight. The animals were allowed to graze for 8 hours daily during day while at night they were individually penned. Grazing intake: Dry matter intake of grasses was estimated by the animal weight gain method. Animals were weighed individually before access to the grazing area. The animals were allowed to graze and weighed at 2-hour intervals from 08.00 to 16.00 hours. The average weight of each animal was recorded. The difference between two weights before and after grazing was considered as the number of grasses consumed by an individual animal of each group. Live weight changes: Animals were weighed initially and then at 7 days intervals. This process was continued before the conception of the animals. Immediately after parturition, the weight of individual lamb was recorded. The animals were weighed at 07.30 hour prior to grazing. Reproductive performance: Date of service, gestation period, litter size, sex, birth weight of lamb were also recorded after parturition. Chemical analysis of samples: The samples were subjected to chemical analysis following the methods of AOAC (1995). The acid detergent fibre (ADF) was determined according to Goering and Van Soest (1970). All the samples were analyzed in duplicate and the mean values were recorded. Statistical analysis: The statistical analysis was done using „SPSS-11.5? statistical program to compute analysis of variance (ANOVA) in a completely randomized design (Steel and Torrie, 1980). Differences among the treatment means were determined by Duncan′s Multiple range Test (DMRT) (Duncan, 1955).

Source of Information: Asian Australas. J. Biosci. Biotechnol. 2016, 1 (1), 73-77; ISSN 2414-1283 (Print) 2414-6293 (Online)

Article Link (Online Journal): www.ebupress.com/journal/aajbb

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In grazing condition sheep received low or minimum amount of DM (1.96% DM of live weight) which was far below for productive and reproductive purposes. It may be concluded that the supplementation of concentrate (2% of LW) was beneficial in terms of increased weight gain, birth weight and born alive of lamb in coastal area.

Knowledge Management: Journal