Reproductive Disorders in Cattle due to Nutritional Status <Review>

国際協力研究誌 14 巻 1 号 45-66 頁 2008-03-31 発行
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タイトル ( eng )
Reproductive Disorders in Cattle due to Nutritional Status <Review>
作成者
Pradhan Rajani
収録物名
国際協力研究誌
Journal of International Development and Cooperation
14
1
開始ページ 45
終了ページ 66
抄録
This review presents a brief overview on nutrition and incidences of reproductive problems in cattle. Overfeeding and underfeeding are equally detrimental to normal reproductive function. The exact mechanism of nutrition on reproduction is still not clear, but it is clear that the primary target area for sensing and reacting to nutritional status is the hypothalamus. Nutrition or perhaps more specifically certain food nutrients can influence the hormonal status of animals at several levels. Generally, energy and protein are the major nutritional factors which affect reproductive process. Inadequate amount of energy develops sexual maturity in heifer cows with a low body condition score at parturition which have poor reproductive performance, possibly due to delay in onset of cyclicity. Cows overconditioned at calving will exhibit decreased appetite and develop severe negative energy balance which causes a linear decrease in the maximum diameter of successive dominant follicle, eventually resulting in anoestrus due to suppressed luteinizing hormone pulse frequency in the final oestrus cycle before anovulation. Dietary increase in protein intake can increase milk production, but can reduce fertility. It is due to the alterations in the oviduct environment or deleterious changes in the follicle. Besides these, deficiency of minerals and vitamins are also equally important from the viewpoint of infertility. However, the specific action of vitamins and minerals in reproduction needs further study. A multitude factors must be considered to understand the complex coordination of the nutrition-reproduction interface.
著者キーワード
energy
hypothalamus
minerals
protein
NDC分類
畜産業 [ 640 ]
言語
英語
資源タイプ 紀要論文
出版者
広島大学大学院国際協力研究科
発行日 2008-03-31
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 1341-0903
[NCID] AN10482914