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Comparative Study Between Semi-intensive and Scavenging Production System on the Performances of Black Bengal Goat

M. R. Islam
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. R. Amin
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. K. M. A. Kabir
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. U. Ahmed
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The experiment was aimed to investigate and compare the growth, milk production and reproductive performances of Black Bengal goat under semi-intensive production (IP) and scavenging production (SP) system. Six Black Bengal does were assigned into 2 treatment (IP and SP) having 3 in each group. The IP group was allowed to graze six hours daily and supplemented with concentrate (soybean meal and wheat bran) and roughage (sorghum and common grass) and the SP group was maintained by the rural landless farmer traditionally as scavenging system. The average birth weight of kids were 1.30 and 0.96 kg for IP and SP systems, respectively and varied significantly (P<0.01). The birth weight of male kids were significantly (P<0.01) higher than that of the female kids. Pre-weaning gain was also significantly (P<0.01) higher in IP than sp system. In both the systems, male kids always showed higher gain than that of females. The kids were weaned at an average age of 92 and 81 days for IP and SP systems, respectively. The kids of the IP and SP systems attained at an average weaning weight of 5.43 and 4.17 kg, respectively which differs significantly (P<0.01). Weaning weight was found to be significantly higher in IP than SP systems. Average initial live weight, live weight at kidding and final live weight at post partum heat of does of IP and SP systems were 22.10, 22.61 and 21.03 and 21.90, 22.35 and 19.73 kg, respectively, where there was no significant difference except the final live weight (P<0.05). The average daily milk yield, total lactation yield and lactation length for IP and SP systems were 214 ml, 20.47 l and 95.33 days and 162 ml, 13.75 l and 84.66 days, respectively and varied significantly (P<0.01). Average litter size of the IP and SP systems was 2.00 and 2.33, respectively. Average post partum heat period and kid mortality were significantly (P<0.01) lower in IP than SP system. Gross return was found higher in IP than that of SP systems. Thus, it can be recommended from the present study that the growth rate, weaning age, weaning weight, milk production, post partum heat period and kid mortality of Black Bengal goat could be improved through proper feeding and better husbandry system which was reflected from gross return.

Keywords: Semi-intensive, Scavenging, Production, Reproduction, Black Bengal goat

Location: Goat and Sheep farm and the laboratory of Animal Science under the Department of Animal Science, Bangladesh Agricultural University

Start Date: 00-00-2009

End Date: 00-00-2009

Program Area: Animal Health and Management

Commodity: Goat

Objectives:

1. To investigate and compare some productive and reproductive performances of Black Bengal goats under improved and traditional management system to exploit the potentialities of goats for the welfare of the rural poor and village community.

Methodology:

The experiment was conducted at the Goat and Sheep farm and the laboratory of Animal Science under the Department of Animal Science, Bangladesh Agricultural University and also in a village of Boyra Union adjacent to Bangladesh Agricultural University campus. The experiment was carried out for a period of 6 months. Six advanced pregnant (3 months) Black Bengal does were selected for the study and were divided into two treatments as semi-intensive production (IP) and scavenging production (SP) system having three in each group. IP group was reared with improved feeding and management in the Goat and Sheep farm of Bangladesh Agricultural University and the SP group was reared with scavenging system by the landless farmers in the village of Boyra, Mymensingh. Selected does were kept in three separate pens with an area of 1.5 sq meters. Separate feeders were used for roughage and concentrate feeding. Fresh drinking water was made available in bucket at all the times. The does were allowed 15 days to adapt to the experimental conditions prior to the commencement of the study. The dams were allowed flushing for 1 month after adjustment period. IP group were supplied required amount of chopped sorghum and natural grasses twice a day. Concentrate feeds (wheat bran, Soybean meal), Calcium oxide and Common salt were also given twice daily, once in the morning at 7.00 am and in the afternoon at 4.00 pm. IP does were allowed for grazing and exercise for a specific period of 6 hours daily. On the other hand, SP does were grazed naturally and residual rice and tree leaves were supplied occasionally. Extra care was not taken for SP does. The initial weight of all experimental does were taken at the beginning of the experiment and the body weight of all does were taken once in a week during the experimental period and recorded to observe the live weight changes of does. The weight was taken in the morning at 7.00 before feeding. The body weight of does was also measured after kidding. The birth weight of newborn kids was taken within one hour after birth and the subsequent weight of kids were recorded on each successive weekend up to 3 months. Weaning weight of kids were considered as the final weight for kids and the birth weight of kids were subtracted from final body weight to calculate the weight gain of each kid. Kid mortality was recorded after kidding till weaning. The quantity of milk was estimated by milking the does once in a week starting from 7th day of kidding. Milking was done in the Litter size was calculated as the number of kids born per kidding per doe. The days at which the does showed their heat was recorded properly and post partum heat period (PPHP) was calculated from the time interval after kidding to the subsequent heat. Cost benefit analysis was calculated by comparing the total cost (Purchase cost of does, feeds, labour, etc.) and the return from IP and SP systems and the gross return was calculated by the differences between the systems. All the data obtained from the experiment were analyzed with the help of Paired Sample Test (t-test) using Statistical Package for Social Science (SPSS 11.5, SPSS Inc. 1999, Microsoft Corporation, 1998 windows package).

Source of Information: J. Bangladesh Agril. Univ. 7(1): 79–86, 2009; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded from the present findings that improved feeding with better management may ensure higher productive and reproductive performances of Black Bengal goats and are profitable for goat rearing in Bangladesh.

Knowledge Management: Journal