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Risk factors for prolonged estrus in crossbred dairy cattle

Indian Agricultural Research Journals

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Title Risk factors for prolonged estrus in crossbred dairy cattle
 
Creator SINGH, JAGIR
GHUMAN, S P S
HONPARKHE, M
DADARWAL, D
 
Subject Body condition score; Corpus luteum; Milk yield; Progesterone; Prolonged estrus
 
Description The present study involving 40 crossbred dairy cattle from various private dairy farms in Punjab assessed various risk factors associated with prolonged duration of estrus (63.30±2.5 h). About 62.5% cattle had regressed corpus luteum (CL) at estrus, 17.5% cattle were over-conditioned and 30% had daily milk yield >30L. Mean duration of estrus in 60% cattle was 52.5±1.2 h, whereas, remaining 40% exhibited 79.5±2.87 h duration. Plasma progesterone at estrus in the former group was 0.48±0.04 ng/ml compared to 0.59±0.04 ng/ml in the latter group. In both these groups, duration of estrus was not influenced by body condition score (BCS) and regressed CL at estrus. About 75.7% cattle with normal BCS exhibited regressed CL at estrus. Moreover, 75% cattle with 19.11±1.30 litre per day milk yield had regressed CL at estrus in comparison to 33.3% cattle producing 39.67±1.98 litre. Plasma progesterone on the day of estrus was similar in cattle either with or without regressed CL. Luteal deficiency during the phase subsequent to prolonged estrus was recorded in 72.5% cattle. About 40% cattle without regressed CL and 92% cattle with regressed CL at estrus exhibited subsequent luteal inadequacy. About 70% cattle had per day milk yield
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2012-01-02
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/13828
 
Source The Indian Journal of Animal Sciences; Vol 82, No 1 (2012)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/13828/6864
 
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