Evaluation of prior grazing experience on reproductive performance in beef heifers
An important part of any production system is the reproductive performance associated with replacement heifers. In the majority of beef operations, heifers are moved to a drylot for a period of time to be weaned and then must again be moved to a forage grazing situation. Therefore, experiments were...
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| Veröffentlicht in: | Professional Animal Scientist 2013-12, Vol.29 (6), p.595-600 |
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| creator | Perry, G.A. Perry, B.L. Walker, J.A. Wright, C.L. Salverson, R.R. Patterson, H.H. |
| description | An important part of any production system is the reproductive performance associated with replacement heifers. In the majority of beef operations, heifers are moved to a drylot for a period of time to be weaned and then must again be moved to a forage grazing situation. Therefore, experiments were conducted to determine whether previous grazing experience affected performance and conception rates. In Exp. 1, beef heifers were moved to a forage grazing situation after a 44-d weaning period in the drylot [EXPER (experienced); n=33] or were moved to a forage grazing situation 27 d before the start of the breeding season [NIV (naïve); n=32]. In Exp. 2, beef heifers were moved to a forage grazing situation before the breeding season (EXPER; n=207) or were moved to a forage grazing situation immediately following AI (NIV; n=214). In Exp. 1, after being moved, NIV heifers lost 1.6±0.08kg/d for the first week they were turned to grass compared with EXPER heifers that gained 0.88±0.08kg/d (P |
| doi_str_mv | 10.15232/S1080-7446(15)30290-4 |
| format | Article |
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In the majority of beef operations, heifers are moved to a drylot for a period of time to be weaned and then must again be moved to a forage grazing situation. Therefore, experiments were conducted to determine whether previous grazing experience affected performance and conception rates. In Exp. 1, beef heifers were moved to a forage grazing situation after a 44-d weaning period in the drylot [EXPER (experienced); n=33] or were moved to a forage grazing situation 27 d before the start of the breeding season [NIV (naïve); n=32]. In Exp. 2, beef heifers were moved to a forage grazing situation before the breeding season (EXPER; n=207) or were moved to a forage grazing situation immediately following AI (NIV; n=214). In Exp. 1, after being moved, NIV heifers lost 1.6±0.08kg/d for the first week they were turned to grass compared with EXPER heifers that gained 0.88±0.08kg/d (P<0.0001). This resulted in a linear (P<0.01) BW gain among EXPER heifers and a quadratic (P=0.04) BW gain among NIV heifers. In Exp. 2, EXPER heifers had increased ADG (P<0.01; 0.58±0.03kg/d) from AI to pregnancy diagnosis and more (P=0.04) became pregnant to AI (59.4%) compared with NIV heifers (0.21±0.03kg/d and 49.1%). In summary, transitioning naive heifers to pasture resulted in BW loss during the first week after movement, and if this transition occurred immediately following AI, pregnancy success to AI was reduced.</description><identifier>ISSN: 1080-7446</identifier><identifier>EISSN: 1525-318X</identifier><identifier>DOI: 10.15232/S1080-7446(15)30290-4</identifier><language>eng</language><publisher>Champaign: Elsevier Inc</publisher><subject>Cattle ; conception rate ; Embryos ; heifer development ; Hogs ; Success ; Weaning</subject><ispartof>Professional Animal Scientist, 2013-12, Vol.29 (6), p.595-600</ispartof><rights>2013 American Registry of Professional Animal Scientists</rights><rights>Copyright American Registry of Professional Animal Scientists Dec 2013</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c281t-1265118964541bd5ffa3bcb0c811f1e80a5e681d4a6fdc74695961b0cfdb6f073</citedby><cites>FETCH-LOGICAL-c281t-1265118964541bd5ffa3bcb0c811f1e80a5e681d4a6fdc74695961b0cfdb6f073</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>312,314,776,780,787,27901,27902</link.rule.ids></links><search><creatorcontrib>Perry, G.A.</creatorcontrib><creatorcontrib>Perry, B.L.</creatorcontrib><creatorcontrib>Walker, J.A.</creatorcontrib><creatorcontrib>Wright, C.L.</creatorcontrib><creatorcontrib>Salverson, R.R.</creatorcontrib><creatorcontrib>Patterson, H.H.</creatorcontrib><title>Evaluation of prior grazing experience on reproductive performance in beef heifers</title><title>Professional Animal Scientist</title><description>An important part of any production system is the reproductive performance associated with replacement heifers. In the majority of beef operations, heifers are moved to a drylot for a period of time to be weaned and then must again be moved to a forage grazing situation. Therefore, experiments were conducted to determine whether previous grazing experience affected performance and conception rates. In Exp. 1, beef heifers were moved to a forage grazing situation after a 44-d weaning period in the drylot [EXPER (experienced); n=33] or were moved to a forage grazing situation 27 d before the start of the breeding season [NIV (naïve); n=32]. In Exp. 2, beef heifers were moved to a forage grazing situation before the breeding season (EXPER; n=207) or were moved to a forage grazing situation immediately following AI (NIV; n=214). In Exp. 1, after being moved, NIV heifers lost 1.6±0.08kg/d for the first week they were turned to grass compared with EXPER heifers that gained 0.88±0.08kg/d (P<0.0001). This resulted in a linear (P<0.01) BW gain among EXPER heifers and a quadratic (P=0.04) BW gain among NIV heifers. In Exp. 2, EXPER heifers had increased ADG (P<0.01; 0.58±0.03kg/d) from AI to pregnancy diagnosis and more (P=0.04) became pregnant to AI (59.4%) compared with NIV heifers (0.21±0.03kg/d and 49.1%). In summary, transitioning naive heifers to pasture resulted in BW loss during the first week after movement, and if this transition occurred immediately following AI, pregnancy success to AI was reduced.</description><subject>Cattle</subject><subject>conception rate</subject><subject>Embryos</subject><subject>heifer development</subject><subject>Hogs</subject><subject>Success</subject><subject>Weaning</subject><issn>1080-7446</issn><issn>1525-318X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqFkE1LAzEQhoMoWKt_QRZPeljNZJNs9qaU-gEFwQ_wFrLZSY203Zpsi_rrTbd61VOGPO8MMw8hx0DPQbCCXTwCVTQvOZenIM4Kyiqa8x0ySFTkBaiX3VT_RvbJQYxvlDJgVTkgD-O1ma1M59tF1rpsGXwbsmkwX34xzfBjicHjwmKWcMBlaJuV7fwaswRcG-Zmw_wiqxFd9oreYYiHZM-ZWcSjn3dInq_HT6PbfHJ_cze6muSWKehyYFIAqEpywaFuhHOmqG1NrQJwgIoagVJBw410jS25rEQlIXHX1NLRshiSk-3ctNb7CmOn04Zt6KKGMl2uQJR_hriEQpRQshSS25ANbYwBnU4e5iZ8aqC6d6x7x3ojMH3o3rHmqfFy24jpzrXHoKPtfTU-oO100_r_RnwDqnaDNA</recordid><startdate>201312</startdate><enddate>201312</enddate><creator>Perry, G.A.</creator><creator>Perry, B.L.</creator><creator>Walker, J.A.</creator><creator>Wright, C.L.</creator><creator>Salverson, R.R.</creator><creator>Patterson, H.H.</creator><general>Elsevier Inc</general><general>American Registry of Professional Animal Scientists</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>4T-</scope><scope>7QG</scope><scope>7ST</scope><scope>7X2</scope><scope>7XB</scope><scope>88A</scope><scope>88I</scope><scope>8AF</scope><scope>8AO</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>LK8</scope><scope>M0K</scope><scope>M2P</scope><scope>M7P</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>S0X</scope><scope>SOI</scope></search><sort><creationdate>201312</creationdate><title>Evaluation of prior grazing experience on reproductive performance in beef heifers</title><author>Perry, G.A. ; Perry, B.L. ; Walker, J.A. ; Wright, C.L. ; Salverson, R.R. ; Patterson, H.H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c281t-1265118964541bd5ffa3bcb0c811f1e80a5e681d4a6fdc74695961b0cfdb6f073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Cattle</topic><topic>conception rate</topic><topic>Embryos</topic><topic>heifer development</topic><topic>Hogs</topic><topic>Success</topic><topic>Weaning</topic><toplevel>online_resources</toplevel><creatorcontrib>Perry, G.A.</creatorcontrib><creatorcontrib>Perry, B.L.</creatorcontrib><creatorcontrib>Walker, J.A.</creatorcontrib><creatorcontrib>Wright, C.L.</creatorcontrib><creatorcontrib>Salverson, R.R.</creatorcontrib><creatorcontrib>Patterson, H.H.</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Docstoc</collection><collection>Animal Behavior Abstracts</collection><collection>Environment Abstracts</collection><collection>Agricultural Science Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest Pharma Collection</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Biological Science Collection</collection><collection>Agricultural Science Database</collection><collection>Science Database</collection><collection>Biological Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><collection>Environment Abstracts</collection><jtitle>Professional Animal Scientist</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Perry, G.A.</au><au>Perry, B.L.</au><au>Walker, J.A.</au><au>Wright, C.L.</au><au>Salverson, R.R.</au><au>Patterson, H.H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaluation of prior grazing experience on reproductive performance in beef heifers</atitle><jtitle>Professional Animal Scientist</jtitle><date>2013-12</date><risdate>2013</risdate><volume>29</volume><issue>6</issue><spage>595</spage><epage>600</epage><pages>595-600</pages><issn>1080-7446</issn><eissn>1525-318X</eissn><abstract>An important part of any production system is the reproductive performance associated with replacement heifers. In the majority of beef operations, heifers are moved to a drylot for a period of time to be weaned and then must again be moved to a forage grazing situation. Therefore, experiments were conducted to determine whether previous grazing experience affected performance and conception rates. In Exp. 1, beef heifers were moved to a forage grazing situation after a 44-d weaning period in the drylot [EXPER (experienced); n=33] or were moved to a forage grazing situation 27 d before the start of the breeding season [NIV (naïve); n=32]. In Exp. 2, beef heifers were moved to a forage grazing situation before the breeding season (EXPER; n=207) or were moved to a forage grazing situation immediately following AI (NIV; n=214). In Exp. 1, after being moved, NIV heifers lost 1.6±0.08kg/d for the first week they were turned to grass compared with EXPER heifers that gained 0.88±0.08kg/d (P<0.0001). This resulted in a linear (P<0.01) BW gain among EXPER heifers and a quadratic (P=0.04) BW gain among NIV heifers. In Exp. 2, EXPER heifers had increased ADG (P<0.01; 0.58±0.03kg/d) from AI to pregnancy diagnosis and more (P=0.04) became pregnant to AI (59.4%) compared with NIV heifers (0.21±0.03kg/d and 49.1%). In summary, transitioning naive heifers to pasture resulted in BW loss during the first week after movement, and if this transition occurred immediately following AI, pregnancy success to AI was reduced.</abstract><cop>Champaign</cop><pub>Elsevier Inc</pub><doi>10.15232/S1080-7446(15)30290-4</doi><tpages>6</tpages></addata></record> |
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| source | Alma/SFX Local Collection |
| subjects | Cattle conception rate Embryos heifer development Hogs Success Weaning |
| title | Evaluation of prior grazing experience on reproductive performance in beef heifers |
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