M. A. Rashid
Department of General Animal Science and Animal Nutrition, Patuakhali Science and Technology University, Khanpura Campus, Barisal-8210, Bangladesh
M. J. Khan
Department of Animal Nutrition, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.
M. A. M. Y. Khandoker
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.
M. M. Monir
Department of General Animal Science and Animal Nutrition, Patuakhali Science and Technology University, Khanpura Campus, Barisal-8210, Bangladesh
Goat, Compound pellet, Feeding system, Performance
Laboratory of Animal Nutrition Department in Bangladesh Agricultural University, Mymensingh
Animal Health and Management
Lack of pasture land and/or availability of abundant crop residues and agro-industrial by-products favours stall feeding system of goat. Under these circumstances the present experiment was conducted with Black Bengal goats feeding with three different forms of a diet viz. (i) green grass + concentrate mixture (conventional), (ii) Green grass + concentrate mixture in pellet form, and (iii) both green grass and concentrate mixture in compound pellet form to know the feasible feeding system which may help in developing stall feeding methods for commercial goat production as well as subsistence farming.
2.3 Selection and management of goat Twenty-four castrated male Black Bengal goats of six months of age were purchased from local farm. The goats were randomly divided into three equal groups, tagged and housed in a well ventilated pen and allowed two weeks to adapt with the housing condition and experimental diets. The goats were vaccinated against Peste des petits ruminants (PPR) after allowing seven days of the quarantined and an anthelmintic drug was administered to control gastrointestinal parasites. All diets were formulated following NRC (1981) standard containing 140g CP and 10.28 MJME/kg DM of feed. Goats of group A received green grass and concentrate mixture in conventional form, treated as control. Goats of group B intake concentrate mixture in pellet form and green grass in conventional form. Animals of group C received both grass and concentrate mixture in compound pellet form. The experimental goats were reared for 100 days with identical care and management and thereafter slaughtered to know the dressing percentage and economic assessment.
2.4 Feeding the goats Napier grass for goats of group A and B was cut, carry and chopped into 10-12 cm immediately before supply at every 8:00 am and 4:00 pm. Concentrate mixture for group A, concentrate in pellet form for B and compound pellet for C were prepared at a time for 10 days. Feed supply was started @ 3kgDM/100kg live weight. Fifty percent of the allocated concentrates were supplied to the respective goats at every 8:00 am. After fifteen minutes fifty percent of green grass was supplied to goats of group A and B. Goats were allowed for grazing from 10:00 am to 12:00 pm, then confined in pen and the rest portion of roughage, concentrate and compound pellet were supplied at 4:00 pm. Grazing length was shortened and feed supply was increased gradually. After seven days, grazing was fully stopped and feed was supplied @ 5kgDM/100kg live weight. Every morning before supply of feed, leftover of roughage (green grass), concentrate mixture and compound pellet, if any, were collected from feeder and weighed. Feed intake was calculated by subtracting the leftover from supplied sample. 2.5 Body weight measurement The initial live weight of each goat was taken at the beginning of the experiment for three consecutive days before offering feed at morning and the mean weight of individual goat was recorded as initial weight. Thereafter, goats were weighed individually at 6:30 am prior morning feeding in every 7 days interval. Final live weight of each goat was also taken for three consecutive days before the end of the experiment of 100 days feeding trial.
2.8 Chemical analysis The samples of feed, leftover and feces were analyzed for nutrient content following the methods of AOAC (2012) [8]. Nutritional analyses were done for dry matter (DM), crude protein (CP), crude fibre (CF), ether extract (EE), total ash (TA) and nitrogen free extract (NFE). Digestible crude protein (DCP) was calculated according to the methods of McDonald (1988). Acid detergent fibre (ADF) and neutral detergent fibre (NDF) content of samples were determined by Fibertec™ system system (VELP Scientifica, EU) following the procedure of Van Soest (1991). Energy value of whole diet was estimated from digestible organic matter (DOM) as ME (MJ/kg DM) = 0.16 × D value (MAFF, 1984). D value or the concentration of digestible organic matter in dry matter (DOMD) of the diets was calculated by the gm of digested OM in each kg DM of diet multiplied by 1000.
2.9 Statistical analysis of the data Data were analyzed as a complete randomized design using the GLM procedure of SAS version 9.1 (SAS Institute Inc., Cary, N.C.) to determine the effects of feeding different forms of ration on growth performance of Black Bengal goat.
IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) e-ISSN: 2319-2380, p-ISSN: 2319-2372. Volume 9, Issue 5 Ver. I (May. 2016), PP 01-08 www.iosrjournals.org
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