+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Dietary protein level and ruminal degradability for mohair production in Angora goats

Dietary protein level and ruminal degradability for mohair production in Angora goats

Journal of Animal Science 70(5): 1526-1533

Twenty-eight Angora goat doelings (average BW 22.1 kg) were used in a 150-d study to examine the effects of dietary CP level and degradability on mohair fiber production. A 2 x 2 factorial arrangement was instituted using conventional, solvent-extracted soybean meal (high degradability) or expelled, heat-treated soybean meal (low degradability) incorporated into low- (12%) or high- (19%) CP diets. Grease and clean mohair weights were greater (P < .05) in goats fed the diets containing 19% CP. Mohair fiber diameter was not affected (P > . 10) by dietary CP level. Clean mohair weight tended (P < .08) to be higher in the goats fed diets containing expelled, heat-treated soybean meal. Body weight gains were not affected (P > .10) by CP level or degradability, whereas DMI increased (P < .01) with increasing CP level. Ruminal fluid pH and total VFA concentrations were not affected (P > .10) by diet. Ruminal ammonia N concentration increased (P < .05) as CP level in the diet increased, and postprandial changes in concentrations were less noticeable in the group fed expelled, heat-treated soybean meal. Plasma urea N (P < .001) and total protein (P < .01) concentration increased as dietary CP level increased. Plasma glucose was elevated (P < .001) 2 h after feeding in the goats fed conventional, solvent-extracted soybean meal, whereas glucagon concentrations were greater at 0 and 4 h in the group fed expelled, heat-treated soybean meal. This study demonstrates the inverse relationship between the quality and quantity of mohair fiber produced, and how fiber characteristics can be affected by dietary CP level and degradability.

(PDF emailed within 1 workday: $29.90)

Accession: 002072065

Download citation: RISBibTeXText

PMID: 1526921

Related references

The effects of whey supplementation on ruminal degradability of barley straw, rumen fermentation in Angora goats and liveweight gain, mohair yield and quality in Angora goat kids. Lalahan Hayvanclk Arastrma Enstitusu Dergisi 37(1): 56-64, 1997

The effect of the different levels of dietary protein on growth, mohair production and mohair quality in young Angora goats. Doga, Turk Veterinerlik ve Hayvanclk Dergisi 13(3): 222-232, 1989

Effect of dietary protein level and yeast culture on growth, blood prolactin and mohair fibre characteristics of British Angora goats. Animal Feed Science & Technology. 38(2-3): 123-133, 1992

The effect of varying protein degradability on mohair fibre characteristics and live weight gain in angora goats. Animal Production 54(3): 472, 1992

Effects of dietary energy intakes on mohair production by angora goats. Journal of Dairy Science 72(SUPPL 1): 511, 1989

A comparison of some important production traits in purebred Turkish Angora goats and their crosses with American Angora goats. 1. Mohair yield and quality. Veteriner Fakultesi Dergisi Istanbul 19(1): 83-99, 1993

Mohair production and mohair quality in Turkish Angora goats. Dergisi Lalahan Zootekni Arastirma Enstitusu 22(1-4): 3-20, 1982

The effects of twice-yearly shearing on mohair production, mohair quality and kid production in Angora goats. Lalahan Zootek. Arast. Enst. Derg, 4: 4, 200-213, 1964

Studies on birth weight, mohair yield and mohair fibre length of Angora and Angora x Gaddi goats. Indian Veterinary Journal 45(11): 929-939, 1968

Effect of feeding protected protein on mohair production in Angora goats. Progress report: PR 3445-3470 98-103, 1977

Relationship between dietary protein mohair fiber and carcass characteristics and fatty acid composition of angora goats. Animal Production 52(3): 609, 1991

Effect of frequency of feeding a protein supplement on mohair production by angora goats. Journal of Animal Science 66(SUPPL 1): 343-344, 1988

The effect of changes in dietary protein and energy on growth body composition and mohair fibre characteristics of british angora goats. Animal Production 54(3): 405-412, 1992

Fattening performance, slaughter and carcass characteristics of male kids of Coloured Mohair goats and Angora goats x Coloured Mohair goats cross-breed F1. 2008

Dietary protein effects on and the relationship between milk production and mohair growth in Angora does. Small ruminant research: the journal of the International Goat Association 33(1): 25-36, 1999