頁籤選單縮合
題 名 | 臺灣黃牛保種(1)--動情週期、懷孕期與胎距及其影響因子=Gene Pool Conservation of Taiwan Yellow Cattle Ⅰ. Investigation of Length of Estrous Cycle, Gestation Length and Calving Interval |
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作 者 | 李光復; | 書刊名 | 畜產研究 |
卷 期 | 30:3 1997.09[民86.09] |
頁 次 | 頁251-256 |
分類號 | 437.399 |
關鍵詞 | 臺灣黃牛; 動情週期; 懷孕期; 胎距; Taiwan yellow cattle; Estrous cycle; Gestation length; Calving interval; |
語 文 | 中文(Chinese) |
中文摘要 | 本試驗主要目的在調查臺灣黃牛之繁殖週期,以建立基礎性狀之資訊供日後生產 管理之參考應用。對保種族群內之母牛及女牛觀察發情期並記錄配種與分娩日期,調查結果 顯示;臺灣黃牛之平均動情週期、懷孕期及胎距分別為22.0±1.8天與25.1±5.2天與34.4 天,可達一年一胎之目的。氣溫的差異對動情期並無影響(P>0.5)發情行為於熱季表現的較 涼季頻繁,此習性與熱帶牛相似,經母牛的懷孕期有比初產牛長的傾向懷雄性胎兒的懷孕期 較雌性胎兒的長1.6天,但哺育仔公牛的母牛其胎距比哺育子女者短9天。 |
英文摘要 | An investigation was conducted on the performance of reproductive cycle in Taiwan Yellow cows in order to establish the database of basic characteristics and for the future utilization Dates of estrus, breeding and calving were recorded from cows and heifers within the conserved populaton. Average length of estrous cycle, gestation length and calving interval were 22.0 ± 1.8 days, 285.1 ± 5.2 days and 360.5 ±34.4 days, respectively, and the goal of one calf per year can be attained. The difference in temperature had no influence on the estrous cycle [P> 0.05]. It is similar to the Bos indicus cattle whose estrus showed more frepuent during hot season other than cool season. Gestation length of multiparous cows had a tendency to be longer than primiparous heifers. Gestation length of cows bearing bull fetuses was 1.6 days longer than those bearing heifer fetuses, however, calving interval of cows suckling bull calves was 9 days shorter than those sucking heifer calves [P> 0.05] |
本系統中英文摘要資訊取自各篇刊載內容。