The Influence of Absorbed Nutrients on Wool Growth

Reis, PJ

doi:10.1007/978-94-011-9702-1_13

Cited by 24 publications

(28 citation statements)

References 30 publications

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“…Sahlu and Fernandez (1992) found that there was a large increase in fiber length with infusion of 2 g of lysine per day. Lysine plays an important role for wool growth, this role may be partly related to the high content of lysine in histone proteins, which are important for cell division, and inner root sheath proteins (Reis, 1989). On the other hand, Reis and Tunks (1978) observed that wool fiber length decreased when lysine was added to a lysine deficient diet.…”

Section: Fiber Length Of Woolmentioning

confidence: 99%

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

Ramadan

El-Harairy

Khalil

et al. 2017

Journal of Animal and Poultry Production

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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).

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Section: Fiber Length Of Woolmentioning

confidence: 99%

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

Ramadan

El-Harairy

Khalil

et al. 2017

Journal of Animal and Poultry Production

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“…This is because it was incorporated into the germinative cells of the follicle bulb and the cells of the inner root sheath Thomas et al (2014). The observations of (Reis, 1989) showed that, Provision of zein protein, which is lacking in both lysine and tyrosine markedly, depresses mitotic activity of bulb cell. But the supplementation of lysine to that protein can reverse such a detrimental effect (Reis and Tunks, 1978).…”

Section: Results and Disccionsmentioning

confidence: 99%

“…The main nutritional determination of wool growth is the amount and amino acid composition in the digestible protein reaching the small intestines (Reis, 1989).The protein of wool is significantly richer in cystine and serine and poor in lysine and methionine but the importance of these amino acids for fibre growth is not necessarily due to a proportionally high requirement of these amino acids for use as substrates in the synthesis of wool protein, but in their production of other proteins (Reis and Tunks, 1978).…”

Section: Introductionmentioning

confidence: 99%

Studies on the skin and wool fibres of Barki sheep fed on protected lysine and methionine

2018

Res. J. Ani. & Vet. Sci.

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The amount of available amino acids containing sulfur is one of the most important nutritional factors that affect the production and quality of wool. Degradation of feed proteins in the rumen prevents food supply to the sheep organism with large quantities of these amino acids. Proteins that avoid bacterial hydrolysis in the rumen (undegradable protein), increase the wool production through the increase in supplying the organism with amino acids, especially cystine, which is a limiting factor for the production of wool. Also, Jovanović et al. (2001) added that, the infusion of cystine into abomasum or blood can double the growth of wool, while the infusion of methionine increases the wool growth by providing sulfur for the synthesis of cysteine.

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“…Most cystine and cysteine in sheep and goats are absorbed from the gastro-intestinal tract, but the others are transformed by methionine through the trans-sulfuration pathway (Reis, 1989). Thus, the main function of methionine is to provide cysteine for wool protein synthesis (Reis, 1979(Reis, , 1989.…”

Section: Discussionmentioning

confidence: 99%

“…Wool growth requires high levels of SAA (Reis, 1989). Bird & Moir (1972) found that methionine infusion through the rumen or abomasums raised the wool yield.…”

Section: Discussionmentioning

confidence: 99%

Promotion of cashmere growth by sulfur supplements in cashmere goats

et al. 2013

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-This study was conducted to investigate effects of inorganic and organic sulfur supplements on cashmere growth and their differences. Thirty-six six-month-old female Liaoning cashmere goats with a body weight of approximately 25 kg and good health were randomly assigned to three treatments: control, ZnSO 4 and HMBi (2-hydroxy-4-(methylthio) butyric acid isopropyl ester). The three groups were fed a basal diet, a ZnSO 4 diet (supplemented with 0.63% ZnSO 4. H 2 O) and an HMBi diet (supplemented with 1.27% HMBi), respectively. Blood and cashmere samples were collected at the end of the three-month experimental period. The plasma concentrations of total protein, urea nitrogen, ammonia and amino acids; the cashmere content of amino acids and sulfur contents; the cashmere growth rates; and the diameter of the cashmere fibres were determined. The results indicated that dietary supplementation with ZnSO 4 or HMBi can decrease the plasma urea nitrogen concentration and increase concentrations of total protein and methionine in plasma. In addition, the two types of sulfur supplements appeared to increase the methionine, cysteine and sulfur contents in cashmere fibres. Furthermore, the supplements can accelerate cashmere growth, with no significant effect on cashmere fineness. The promotion of cashmere growth probably stems from the improvement in the protein metabolic balance, sulfur retention and sulfur-containing amino acids synthesis in cashmere goats following the ZnSO 4 or HMBi supplementation. In general, the ZnSO 4 supplement promotes greater cashmere growth than the HMBi supplement under the experimental conditions.

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The Influence of Absorbed Nutrients on Wool Growth

Cited by 24 publications

References 30 publications

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

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

Studies on the skin and wool fibres of Barki sheep fed on protected lysine and methionine

Promotion of cashmere growth by sulfur supplements in cashmere goats

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