{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,10]],"date-time":"2023-10-10T06:51:00Z","timestamp":1696920660386},"reference-count":18,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2006,2,27]],"date-time":"2006-02-27T00:00:00Z","timestamp":1140998400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Reprod Domestic Animals"],"published-print":{"date-parts":[[2006,4]]},"abstract":"<jats:title>Contents<\/jats:title><jats:p>This trial was conducted on a Hungarian dairy farm between July 2001 and December 2004. The objective of this work was to improve the reproductive efficiency with relatively high milk production. At the beginning of this trial blood and fodder samples were taken for checking the metabolic status of the animals in order to determine their health condition. The nutritive value of the daily ration for all groups met with the requirements of the Hungarian National Standard and almost all serum metabolic parameters differed between the milking and pregnant animals. Early pregnancy detection (by ultrasound) and ovulation synchronizing methods were introduced to optimize reproductive performance. The oestrus cycle was also checked by ultrasound and open cows were treated by the appropriate method in order to inseminate them as soon as possible. Efficiency of artificial insemination (AI) followed by a single prostaglandin F<jats:sub>2\u03b1<\/jats:sub> (PGF<jats:sub>2<jats:italic>\u03b1<\/jats:italic><\/jats:sub>) and Ovsynch treatment was similar (30.8% and 29%) and less effective than AI after natural heat detection (37.1%). Provsynch (Pre\u2010synch followed by Ovsynch) was the most effective ovulation synchronization method (conception rate\u2003=\u200342.6%; p\u2003&lt;\u20030.01). Although milk production increased between 2002 and 2004 by approximately 600\u2003kg per cow, the calving period decreased by 20\u2003days and the number of AIs per pregnancy was also improved (0.8 AI per conception). These findings are really beneficial economically because the decrease in the calving interval returns profit for the dairy farms; one open day costs \u20ac2.5\/cow. Economical analysis showed a high profit ratio from the reproductive \u2018investment\u2019 on this farm. Every invested \u20ac yielded approximately \u20ac10.<\/jats:p>","DOI":"10.1111\/j.1439-0531.2006.00671.x","type":"journal-article","created":{"date-parts":[[2006,2,27]],"date-time":"2006-02-27T17:51:04Z","timestamp":1141062664000},"page":"184-188","source":"Crossref","is-referenced-by-count":2,"title":["Improving the Reproductive Efficiency by Zoo\u2010Technical Methods at a Dairy Farm"],"prefix":"10.1111","volume":"41","author":[{"given":"F","family":"T\u00f3th","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G","family":"G\u00e1bor","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M","family":"M\u00e9zes","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00c9","family":"V\u00e1radi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L","family":"\u00d3zsv\u00e1ri","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"RG","family":"Sasser","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zs","family":"Abonyi\u2010T\u00f3th","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,2,27]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(99)75516-5"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0093-691X(92)90151-G"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(98)70146-8"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0378-4320(00)00076-2"},{"key":"e_1_2_5_6_1","first-page":"153","volume-title":"Large Dairy Herd Management","author":"Chenault JR","year":"1992"},{"key":"e_1_2_5_7_1","doi-asserted-by":"crossref","first-page":"98","DOI":"10.21423\/bovine-vol0no24p98-105","article-title":"Effectiveness of prostaglandin treatment of anoestrus in dairy cows","volume":"24","author":"Gaines JD","year":"1989","journal-title":"Bov Pract"},{"key":"e_1_2_5_8_1","unstructured":"Hungarian Feed Codex Committee:Hungarian Feed Codex 2004 National Institute for Agricultural Quality Control. ISBN: 963 8609753."},{"key":"e_1_2_5_9_1","first-page":"75","article-title":"The interrelation of nutrition, milk production and reproduction in high\u2010yielding dairy cows. Part 2: The onset of cyclic ovarian function in the postpartum period. A review of literature","volume":"125","author":"Huszenicza GY","year":"2003","journal-title":"Magy \u00c1llatorv Lapja"},{"key":"e_1_2_5_10_1","first-page":"203","article-title":"The interrelation of nutrition, milk production and reproduction in high\u2010yielding dairy cows. Part 4: Form and consequences of increased ketone production. 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