EFFECT OF FEEDING RATIONS CONTAINING PADDY STRAW INCUBATED WITH MAIZE SPENT LIQUOR (MSL) ON NUTRIENT UTILIZATION IN CROSSBRED CALVES
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Date
2019-01
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SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517502. (A.P.) INDIA
Abstract
The paddy straw treated with different levels of MSL (i.e., 10, 20 and
30%) and subjected to different days (i.e., 1, 2, 3, 4 and 5) of incubation was
evaluated through in vitro studies. Based on in vitro studies, optimum level of
MSL (20%) and days of incubation (1 day) was chosen and compared with
untreated straw through in vivo studies for their effect on nutrient digestibility.
Eight crossbred male calves were divided into two equal groups i.e., T1 (control)
and T2 (treatment). All the animals in the control group were fed a basal diet
comprising of 3.75 kg of paddy straw, 1.6 kg concentrate mixture while those in
the treatment group were fed 5 kg of 20% MSL treated paddy straw incubated
for one day and 1 kg concentrate mixture (CP 20%) to meet the nutrient
requirements (ICAR, 2013). The percent DM, OM, TA, CP, EE, CF, NFE, Ca and P content of MSL were 16.88, 91.96, 8.04, 14.33, 4.37, 0.00, 73.26, 0.24 and 0.69, respectively. The in vitro studies conducted using rumen liquor of buffalo bulls revealed that treatment of paddy straw with MSL at 10, 20 and 30% levels and incubated for 1, 2, 3, 4 and 5 days had no effect (P>0.05) on in vitro digestibility (%) of DM, OM and CP. The nutrient intakes (kg/d) of DM, OM, CP, EE, CF, NFE, NDF, ADF, hemi-cellulose and cellulose were significantly higher (P<0.01) in T2 as
compared to T1. Feeding of crossbred calves with 20% MSL treated paddy straw incubated for 1 day had no effect (P>0.05) on digestibility coefficients (%) of gross
nutrients and fibre fractions as compared to the control. Further, feeding 20%
MSL treated paddy straw after 1 day of incubation had no effect (P>0.05) on N,
Ca and P retentions (g/d). The DCP content expressed as % in the diet consumed
was higher (P<0.01) in T1 as compared to T2, while the TDN content expressed
as % in the diet consumed was similar among both the treatments. The DM, DCP,
TDN and ME intakes expressed as g/kg W0.75 were similar between both the
treatments and were higher than the values recommended by ICAR (2013)
standards. Further, feeding 20% MSL treated paddy straw incubated for 1 day
resulted in decrease in cost of feed/animal/day by ₹ 4.75 as compared to the
control. Based on the results of the present study, it is concluded that feeding 20%
MSL treated paddy straw after 1 day of incubation resulted in decreased feed
cost/animal/day without any adverse effects on nutrient utilization in crossbred
calves.
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