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reproductive performance definition in dairy cattle: affective factors
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نویسنده
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dayyani nematollah ,karkudi keyvan ,bakhtiari hasan
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منبع
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international journal of advanced biological and biomedical research - 2013 - دوره : 1 - شماره : 11 - صفحه:1392 -1396
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چکیده
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The reproductive performance of a dairy herd has a significant effect on the profitability of that herd. common measures of reproductive performance are days to first service, days to conception, calving interval, services per conception, conception rate, estrus detection rate, and pregnancy rate. most cow operations would benefit economically by reducing the number of operational days, decreasing culling rates due to non-pregnant females, and shortening their calving interval. several factors influence reproductive performance, but none require more visual attention than heat or estrus detection.
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کلیدواژه
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reproductive ,performance ,dairy cattle
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آدرس
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payame noor university university, faculty of agriculture, ایران, islamic azad university, saveh branch, ایران, payame noor university university, ایران
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Authors
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