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Effects of betaine and choline suppl...

Shenkoru, Teshome.

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Effects of betaine and choline supplementation on mohair and milk production by goats.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Effects of betaine and choline supplementation on mohair and milk production by goats./
作者:	Shenkoru, Teshome.
面頁冊數:	99 p.
附註:	Adviser: F. N. Owens.
Contained By:	Dissertation Abstracts International62-08B.
標題:	Agriculture, Animal Culture and Nutrition. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3023952
ISBN:	0493354905

Effects of betaine and choline supplementation on mohair and milk production by goats.
Shenkoru, Teshome.

Effects of betaine and choline supplementation on mohair and milk production by goats. - 99 p.

Adviser: F. N. Owens.

Thesis (Ph.D.)--Oklahoma State University, 2001.

<italic>Scope and method of study</italic>. The objectives of this study was to investigate the response of goats to supplemental dietary ruminally protected choline or betaine (methyl donors) in body weight gain, efficiency of feed, mohair yield and quality, milk yield and composition. In the first experiment, 25 Angora wethers (29 ± 6 kg initial BW, and >1 yr of age) were used to see the effect of choline. In the second experiment, the effect of betaine was studied using 25 castrated Angora goat (20 ± 2 kg initial BW, and 7 mo of age). In the third experiment, 24 Alpine does and 24 Alpine doelings were used to evaluate the effects of dietary rumen protected methyl donors on lactational performance with a moderate level of crude protein (15% CP) in the diet. The effects of protected methyl donors were evaluated at four levels, animal performance, ruminal fermentation by products, plasma metabolites and plasma amino acids and nitrogen utilization.

ISBN: 0493354905Subjects--Topical Terms:

1017857
Agriculture, Animal Culture and Nutrition.

Effects of betaine and choline supplementation on mohair and milk production by goats.
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245 1 0 $a Effects of betaine and choline supplementation on mohair and milk production by goats.
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500 $a Adviser: F. N. Owens.
500 $a Source: Dissertation Abstracts International, Volume: 62-08, Section: B, page: 3427.
502 $a Thesis (Ph.D.)--Oklahoma State University, 2001.
520 $a <italic>Scope and method of study</italic>. The objectives of this study was to investigate the response of goats to supplemental dietary ruminally protected choline or betaine (methyl donors) in body weight gain, efficiency of feed, mohair yield and quality, milk yield and composition. In the first experiment, 25 Angora wethers (29 ± 6 kg initial BW, and >1 yr of age) were used to see the effect of choline. In the second experiment, the effect of betaine was studied using 25 castrated Angora goat (20 ± 2 kg initial BW, and 7 mo of age). In the third experiment, 24 Alpine does and 24 Alpine doelings were used to evaluate the effects of dietary rumen protected methyl donors on lactational performance with a moderate level of crude protein (15% CP) in the diet. The effects of protected methyl donors were evaluated at four levels, animal performance, ruminal fermentation by products, plasma metabolites and plasma amino acids and nitrogen utilization.
520 $a <italic>Findings and conclusions</italic>. Protected choline did not influence ADG or mohair growth, however, effects on ruminal fermentation conditions, plasma concentration of methionine, NEFA, and proportions of medullated and kemp fiber were observed. In the second experiment dietary protected betaine level and types increased ADG, feed efficiency, greasy mohair weight, fiber length, digestible nitrogen intake and the amount of N retained. Ruminal pH increased linearly as the level of protected betaine increased. No effect was observed on plasma metabolites and amino acids. Both protected betaine or choline treatments increased DMI of doelings, however, had no effect on milk production in doelings, and betaine lowered milk production in does. The 15% CP diet was sufficient to support milk production in both age groups of lactating Alpine goat.
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