EFFECT OF FEEDING ON SALT TOLERANT PLANTS ON PHYSICAL AND CHEMICAL PROPERTIES OF COAT FIBERS IN SHEEP
Journal of Animal and Poultry Production
The present study used the experimental work of technical cooperation project entitled "salt-tolerant forage production systems to salt-affected lands in Sinai Peninsula in Egypt" which supported by ICBA (International Center for Biosaline Agriculture). The aim of the present study was effect of feeding on salt tolerant plants ((Kochia indica and Pennisetum americanum) on physical and chemical properties of coat fibers in sheep. Twenty four male growing Barki lambs Twenty-four male growing
... aged six months of age and 18.8±0.89 Kg of body weight) were divided randomly into three groups given CFM (concentrate feed mixture) to cover 100% of maintenance requirement. Berseem hay (Trifolium alexandrinum) fed to the first group (G1) as a control diet. The total amount of (Kochia indica) and (Pennisetum americanum) grass mixture was divided into two equal parts: the first part was kept as hay to be fed for the second group (G2) while the other part was mixed with 5% molasses to make haylage for the third group (G3). Wool samples were taken to estimate fiber length (FL), fiber cross sectional area (FCSA), crimp frequency (CF), cotting score (CS), also amino acids; Threonine (Thr), Valine (Val), Methionine (Met), Isoleucine (Iso), Leucine (Leu), Phenylalanine (Phe), Histidine (His), Lysine (Lys), Aspartic acid (Asp), Serine (Ser), Glutamic acid (Glu), Proline (Pro), Glycine (Gly), Alanine (Ala), Cystine (Cys), Tyrosine (Tyr) and Arginine (Arg) were analyzed. Results showed a slight increase in all fiber amino acids contents for both G2 and G3 as compared with control. Results recorded marked differences in Cys, Ala, Asp, Arg, Thr and Met between all groups. Amino acids; Cys, Ala, Glu, Pro and Met showed a significant increase in G3 whereas only Met achieved a marked increase in the two treatment groups than control. Amino acid Met significantly increased in coarse and fine fibers of both G2 and G3, while Ala tended to be higher in only fine fibers of G3 as compared with control. There was no significant effect of treatment on the studied wool characteristics, except CS which significantly increased in G2 and G3. Within groups, FL slightly increased in coarse and fine fibers in both G2 and G3. The increase in FL of coarse fibers was significantly higher than fine fibers in G2 and G3. The same trend was observed in CS. The FCSA decreased in both coarse and fine fibers of G2 and G3 than control, this decline was higher in G3 than G2. Feeding on haylage might cause an increase in fiber length and fiber fineness through decreasing FCSA, and an increase of CF in fine fibers of G3 than G2 and a partially decline in CS. It could concluded that feeding on salt tolerant plants (Kochia indica and Pennisetum americanum) mixed with molasses may cause an increase in fiber amino acids contents which in turn make changes in physical characteristics of wool fibers viz.; an increase in fiber length and cotting score, and a decrease in fiber cross sectional area and crimp frequency of Barki lambs.