EFFECT OF FIBROLYTIC ENZYME SUPPLEMENTATION ON NUTRIENT UTILIZATION OF SHEEP
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Date
2012
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Publisher
AAU, Anand
Abstract
An experiment of 105 days (15 weeks) duration was carried out on twelve
Patanwadi sheep to study the effect of wheat straw based TMR and fibrolytic enzyme
+ wheat straw based TMR on nutrient utilization. The sheep under control group (T1)
were fed wheat straw based TMR whereas the sheep under treatment group (T2) were
fed commercial fibrolytic enzyme (@ 0.025%) + wheat straw based TMR. The
commercial enzyme spread just before feeding of TMR to sheep. The nutrient
requirements of sheep in terms of DCP and TDN were met as per ICAR (1998)
feeding standards. The final body weight of experimental sheep was 28.87 and 27.76 kg under T1
and T2, respectively with non-significant difference (P>0.05). The data for daily DMI
g per day per sheep, kg per 100 kg body weight and g per kg metabolic body weight
were 747.48, 2.60 and 60.06 for control (T1) while 717.94, 2.61 and 59.35 for
treatment (T2) group. Non significant differences were observed for DM intake as g
per day and kg/100 kg body weight body weight basis. However, significant (P<0.05)
difference was found for DMI on metabolic body weight basis. The lower SRL pH was observed for T2 (6.57) as compared to T1 (6.64),
though the treatment difference was non significant (P>0.05). The average TVFA
concentration was also similar under both the groups. The average values of
ammonia-N (9.24 mg/dl under T1 and 9.26 mg/dl under T2) were non-significant
(P>0.05) between treatments. The total-N concentrations under T2 (88.36 mg/dl) were
significantly (P<0.05) higher than T1 (82.48 mg/dl). The average values of NPN were
70.00 and 69.69 mg/dl under T1 and T2, respectively with non-significant difference.
However, protein N was highly significant (P<0.01) in T2 (18.40 mg/dl) as compared
to T2 (14.03 mg/dl).
The values for digestibility of dry matter were higher in T2 (57.13%) as
compared to T1 (55.45%) with non-significant difference (P>0.05). The values for
digestibility of crude fiber (72.53 and 70.55%) and ether extract (73.74 and 73.37%
under T1 and T2, respectively) were lower in T2 as compared to T1 (P>0.05). Though
the digestibility of crude protein (78.14 & 84.27%) and nitrogen free extract (62.25 &
64.99% under T1 and T2, respectively) were highly significant (P<0.01) under
treatment group (T2) than control group (T1). The difference for organic matter
digestibility was non-significant (P>0.05) as these values were almost similar (68.49
and 68.26% under T1 and T2, respectively). Average daily CP intake was 72.28 and
71.43 g/d under T1 and T2, respectively with non- significant difference (P>0.05) and
the same trend followed in DCP intake. The values for TDN intake were 473.71 g and
446.31 g under T1 and T2, respectively. The daily feed cost was ` 6.04 and 5.90 under T1 and T2, respectively which was lower in T2 as compared to T1 with non-significant (P>0.05) difference.
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Keywords
veterinary science, animal nutrition, method