EFFECT OF DIFFERENTLY PROCESSED COMPLETE DIET CONTAINING DETOXIFIED NEEM SEED CAKE ON GROWTH AND NUTRIENT UTILISATION IN SHEEP
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Date
2003
Authors
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD
Abstract
Twenty four Nellore ram lambs with an average body weight of 18.81±0.5 kg were
randomly distributed into 4 groups each comprising of 6 animals and fed conventional
diet (R1) containing concentrate and chopped sorghum straw and a complete diet
containing 15% detoxified neem seed cake in three different forms namely mash (R2),
expander extruder processed pellets (R3) and steam pellets (R4). A 180 day growth cum
metabolic trial was conducted to study the effect of experimental rations on growth and
nutrient utilization. Dry matter intake was significantly (P<0.01) lower on complete
mash ration than those fed on conventional, expander-extruded pellets and steam
pelleted diets. The digestibilities of OM, and CF were significantly (P<0.05) higher in
lambs fed R3 and R4 than those fed R1 and R2 rations where as CP digestibility was
significantly (P<0.05) higher on R3 and R4 followed by R2 and R1. All the lambs were on
positive nitrogen, calcium and phosphorus balances. Nitrogen and calcium balances
were significantly (P<0.05) higher in lambs fed pelleted rations. Phosphorus balance
was not significantly (P>0.05) different among the lambs fed conventional ration and
differently processed complete rations. The DCP and TDN contents of the rations were
significantly (P<0.01) higher in both the pelleted rations (R3 and R4) than the
conventional (R1) and mash (R2) rations. Average daily gain (ADG) was significantly
(P<0.05) higher in the lambs fed pelleted rations than control group and lower on mash
than control. Pelleting of complete diet decreased the cost of feed and feed intake per kg
gain. There were no significant (P>0.05) differences among treatment groups with
regard to dressing percentage, proportion of lean, bone and fat, edible and non-edible
organs. But, increased trend in dressing percentage was recorded in pelleted diets fed
group compared to control. Lean per cent showed increased trend with concomitant
decrease in proportion of bone and fat in lambs fed pelleted diets. Carcass characters in
this experiment indicate favorable conditions for good quality meat from sheep fed
complete rations formulated with unconventional feed ingredients such as neem seed
cake. The results of this experiment indicate that detoxified neem seed cake can be
incorporated in the rations of sheep without any deleterious effect on health and
performance. Pelleting the mash diet either by expander-extruder or steam pelleting
process improved growth and feed efficiency in sheep and expander extruder processing
can be preferred over steam pelleting due to less cost of processing.
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Keywords
EFFECT , DIFFERENTLY, PROCESSED, COMPLETE, DIET, CONTAINING, DETOXIFIED, NEEM SEED, CAKE, GROWTH, NUTRIENT, UTILISATION, SHEEP