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Nutritive value of several raisin by-products for ruminants evaluated by
chemical analysis and in situ ruminal degradability
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Yari M 1,4, Manafi M1, Hedayati M1,
Khalaji S1, Mojtahedi M2, Valizadeh R3
and Hosseini Ghaffari M3 |
1Department
of Animal Science, College of Agriculture, Malayer University,Malayer
65719–95863, Iran; 2Department of Animal Science, College of
Agriculture, Birjand University, Iran; 3Department of Animal
Science, College of Agriculture, Ferdowsi University of Mashhad, Iran
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Abstract |
Feeding ruminants with agro-industrial by-products can help to fill feed
shortages in dry period. The objectives of current study were to
determine the nutritive value of several sun dried grapevine (raisin)
by-products (RBPs) for ruminants using chemical composition analysis and
in situ ruminal degradability. Several RBPs of sun dried treated
grapevine cluster (Vitis vinifera L. cv. Sultana) include 1)
outer layer of flesh and skin and pedicle of berries (RBP1); 2) rejected
raisins mostly un-ripped berries with their pedicles (RBP2) and 3)
peduncles and rachises with their lateral branches of clusters (RBP3).
Results showed that the RBP1 had lower neutral detergent fiber, lignin (sa.)
and nitrogen to organic matter ratio while these components were higher
for RBP3, with RBP2 intermediate (P<0.05).
The RBP1 and RBP3 had higher total tannin concentration compared with
RBP2 (75.8 and 69.2 respectively versus 34.6 g/kg DM;
P<0.05). The RBP1 had
higher in situ ruminal degradation and lower undegradable
fraction (predicted by in situ and DVE/OEB 1994 model) for dry
matter (DM) and organic matter (OM) compared with RBP3, with RBP2
intermediate (P<0.01). In conclusion, the RBPs could be
considered as alternative feed in ruminants feeding during dry periods;
however, their tannin and lignin (sa) content should be taken into
consideration for decision making.
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Keywords:
In situ
ruminal degradation; raisin by-products; tannin |
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To cite this article:
Yari M, M Manafi, M Hedayati, S Khalaji, M Mojtahedi, R Valizadeh and M
Hosseini Ghaffari,
2015.
Nutritive value of several raisin by-products for ruminants evaluated by
chemical analysis and in situ ruminal degradability.
Res.
Opin. Anim. Vet. Sci., 5(4): 198-204. |
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