EVALUATION OF JACKFRUIT (Artocarpus heterophyllus) RESIDUE SILAGE AS A SOURCE OF ROUGHAGE IN SHEEP
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Date
2021-03
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KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR
Abstract
The experiment was conducted to study the effect of feeding jack fruit residue
silage as partial source of roughage on the voluntary dry matter intake, growth and
efficiency of feed utilization in sheep fed straw based diet. Twelve Mandya (Bannur) lambs
of three to six months of age with body weight ranging from 8.5 to 10.85 kg were selected
from the flock, for growth cum digestion trial experiment. Animals were divided into two
groups of six each based on body weight and age in a completely randomized design
(CRD). Twelve weeks feeding trial was carried out and at 8th week of the experiment,
digestion trial was carried out for six days period using all lambs from both the groups.
First group (T1) of lambs were fed with finger millet straw (FMS) as the sole source of
roughage, while the second group (T2) animals were fed with jackfruit residue silage to
replace (50%) FMS as a source of roughage and compounded feed mixture (CFM) was fed
to both the groups to balance the ration. Chemical composition analyses (%) revealed that
the JFRS had higher CP (8.77 v/s 3.35) and EE (1.91 v/s 0.79) and lower TA (6.46 v/s
8.51), NDF (34.08 v/s 71.84), ADF (27.88 v/s 46.46) and ADL (1.06 v/s 3.83) contents as
compared to FMS. There was no significant difference in total DMI (as g/d and % BW)
between the two treatment groups (T1; 466.5 & 3.6 and T2; 481.8 & 3.59). There was
significant difference (P≤0.05) in total CPI and NDFI (as g/d and per cent of body weight)
between the treatment groups. There was also significant difference (P≤0.05) in ADFI (as
per cent of body weight) between the two treatment groups. The ADG (g per day) for T1
and T2 groups was statistically (P≤0.05) significant (T1: 82.92 and T2: 102.5) however,
the FCR was comparable between the two treatments. The mean apparent digestibility (%)
of nutrients (DM, OM, CP, NDF and ADF) and the per cent DOMDM (T1: 59.36 & T2:
61.92) were also comparable between the two treatment groups. The JFRS has an effective
nutritive value, hence it can be included in the diet replacing 50 per cent of the FMS fed to
growing lambs for eco-friendly and cost effective small ruminants production in India.