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The association of level of milk pro...

Campbell, Mollie Sovereen.

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The association of level of milk production with reproductive performance in Canadian dairy cattle.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The association of level of milk production with reproductive performance in Canadian dairy cattle./
作者:	Campbell, Mollie Sovereen.
面頁冊數:	90 p.
附註:	Source: Masters Abstracts International, Volume: 48-01, page: 0316.
Contained By:	Masters Abstracts International48-01.
標題:	Agriculture, Animal Culture and Nutrition. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR52202
ISBN:	9780494522028

The association of level of milk production with reproductive performance in Canadian dairy cattle.
Campbell, Mollie Sovereen.

The association of level of milk production with reproductive performance in Canadian dairy cattle. - 90 p.

Source: Masters Abstracts International, Volume: 48-01, page: 0316.

Thesis (M.Sc.)--University of Guelph (Canada), 2009.

This thesis describes the association of the level of production with reproductive performance at the herd and animal levels.

ISBN: 9780494522028Subjects--Topical Terms:

1017857
Agriculture, Animal Culture and Nutrition.

The association of level of milk production with reproductive performance in Canadian dairy cattle.
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100 1 $a Campbell, Mollie Sovereen. $3 1676992
245 1 4 $a The association of level of milk production with reproductive performance in Canadian dairy cattle.
300 $a 90 p.
500 $a Source: Masters Abstracts International, Volume: 48-01, page: 0316.
502 $a Thesis (M.Sc.)--University of Guelph (Canada), 2009.
520 $a This thesis describes the association of the level of production with reproductive performance at the herd and animal levels.
520 $a At the herd level, each 1000 kg of herd mean mature equivalent milk was associated with an increase of 0.7 points of PR (P < .0001). At the individual level, there was a small association of increased milk yield at TD1 with longer time to pregnancy (hazard ratio (HR) = 0.997 per kg, P = .02) and in the same model increasing 305 d projection at TD3 was associated with shorter time to pregnancy (HR = 1.07 per 1000 kg, P < 0.0001).
520 $a In summary, herd pregnancy rate was significantly higher in higher producing herds, and for individual cows there were significant but conflicting effects of level of production on time to pregnancy. This suggests that managing to provide for high production can be compatible with good reproductive performance.
590 $a School code: 0081.
650 4 $a Agriculture, Animal Culture and Nutrition. $3 1017857
650 4 $a Health Sciences, Epidemiology. $3 1019544
650 4 $a Biology, Veterinary Science. $3 1021733
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710 2 $a University of Guelph (Canada). $3 1018650
773 0 $t Masters Abstracts International $g 48-01.
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791 $a M.Sc.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MR52202