Impact of Adding Rumen Protected Lysine or/and Methionine on Some Wool Characteristics in Barki Sheep

Abstract

Twenty four adult Barki eweswere used to investigate the effect of addition of rumen protected amino acids, lysine or/and methionineon some wool characteristics. This study was carried out from September 2016 to February 2017. Animals were divided into four groups (6ewes/group). The first group (Control): fed only the control diet, second group (LYS): fed the control diet and rumen protected lysine (6g Lysi pearl /kg concentrate, 3g /animal/day), third group (MET): fed the control diet and rumen protected methionine (14g Smartamin/kg concentrate, 7g /animal/day) and fourth group (LYS+MET): fed the control diet and mixture of (3g LYS and 7g MET/animal/day) for six months. Some wool measurements were investigated such as fiber length, fiber diameter, staple strength and wool growth per 10 cm 2 and clean wool yield. Results showed that supplementing methionine caused significant (P<0.05) increase in fiber length, fiber diameter, staple strength and clean wool yield. Lysine increased fiber length significantly (P<0.05), but did not affect clean wool yield and caused small increase in both staple strength and fiber diameter. Supplementing of (mixture of methionine and lysine) increased significantly fiber length, wool yield and staple strength, but caused insignificant increase in clean wool production per 10cm 2 , but had no significant effect on fiber diameter.From these results, it can be concluded that addition of rumen protected methionine (7g Smartamin/animal/day) forsix monthsenhanced significantly wool characteristics of Barki ewes (fiber length, fiber diameter, staple strength and clean wool yield).

Impact of adding dietary different levels of protected methionine on wool characteristics, ultrastructure, and blood components of Barki sheep

“…This was longer than the normal values stated by Nasr and Ramadan (2017) and Mohamed (2019), who found that the SL of Barki sheep was 7.50 ± 0.49 and 9.64 ± 0.227 cm, respectively. In accordance with our results, Ramadan et al (2017) found that the addition of 7 g of methionine showed an insignificant increase in wool SL compared with the control. The wool SL increased with the increase in the duration of treatment.…”

“…These changes might be consistent with a slight increase in the wool proportion of high sulphur proteins after enrichment of sulphur compared to low sulphur proteins. Ramadan et al (2017) found that adding protected amino acids Methionine or Lysine led to an increasing in Tyrosine, Serine, Glutamic acid, and Lysine significantly, but Valine, Leucine, Methionine, Glycine, and Proline decreased significantly compared to control animals. This modification seems to be due entirely to an alteration in the overall composition of the high-sulphur proteins and to an increase in their proportion in the fiber.…”

“…Also, Younis and Abd-Elazem (2019) found that adding protected amino acids lysine or/and methionine caused a significant increase in lysine, glutamic, and arginine concentrations, while it caused a significant decrease in proline and ammonia concentrations. Ramadan et al, (2017) found that concentrations of arginine, glutamic, and lysine in Barki sheep increased significantly when protected amino acids methionine and lysine were supplemented, for diets ewes but ammonia and proline concentrations decreased significantly.…”

“…There was a significant increase in some wool traits of Barki ewes, such as clean wool yield, fiber length, staple strength, and fiber diameter, when protected methionine (7g Smartamin/animal daily) was added for six months (REF). It is concluded that studies must be made to improve the production of local wool suitable for the manufacturing purposes of woolen textiles to satisfy the taste of consumers and to decrease the expensive imported wool (Ramadan et al 2017).…”

Effects of Rumen-Protected Methionine Supplementation on Growth Performance, Nutrient Digestion, Nitrogen Utilisation and Plasma Amino Acid Profiles of Liaoning Cashmere Goats

“…In North-Eastern China, crop straw (i.e., grazing) and a corn-soybean mixture are the main components of cashmere goat diets, which usually lack Met, and the offered protein frequently falls short of the recommended nutritional requirements [15]. It has been observed that feeding rumen-protected Met (RPM) can improve the growth performance of goats [16], milk yield of dairy goats [17,18] and wool characteristics of sheep [19], as well as to improve N utilisation in goats [16]. However, in relation to cashmere goats, the impact of RPM on performance and nutrient utilisation is currently poorly understood.…”