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Determination of optimal DCAD concen...

Iwaniuk, Marie Elizabeth.

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Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows./
Author:	Iwaniuk, Marie Elizabeth.
Description:	157 p.
Notes:	Source: Masters Abstracts International, Volume: 52-05.
Contained By:	Masters Abstracts International52-05(E).
Subject:	Animal sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1552372
ISBN:	9781303720130

Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows.
Iwaniuk, Marie Elizabeth.

Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows. - 157 p.

Source: Masters Abstracts International, Volume: 52-05.

Thesis (M.S.)--University of Maryland, College Park, 2013.

This item is not available from ProQuest Dissertations & Theses.

The objective was to determine the optimal dietary cation-anion difference (DCAD) required to maximize 3.5% fat-corrected milk (FCM) and feed efficiency (FE; FCM per dry matter intake (DMI)) in lactating dairy cows. When potassium carbonate was added resulting in four dietary treatments: 250, 300, 350, and 400 meq/kg DCAD, increasing DCAD linearly increased FCM and FE suggesting an optimal DCAD of at least 400 meq/kg. In a subsequent study comparing the relative effectiveness of potassium versus sodium, cation source had no effect on DMI or FCM. However, milk fat percentage and FE were highest when sodium was used as the sole cation source. Finally, surface response equations developed from literature data showed that DMI, FCM, milk fat %, rumen pH, and fiber digestibility increased linearly with DCAD. This suggested that improved FE was a function of improved rumen function, energy availability, and partitioning of absorbed energy toward milk energy.

ISBN: 9781303720130Subjects--Topical Terms:

3174829
Animal sciences.

Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows.
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020 $a 9781303720130
035 $a (MiAaPQ)AAI1552372
035 $a AAI1552372
040 $a MiAaPQ $c MiAaPQ
100 1 $a Iwaniuk, Marie Elizabeth. $3 3174848
245 1 0 $a Determination of optimal DCAD concentration and relative effectiveness of potassium versus sodium cation supplementation for maximal feed efficiency in lactating dairy cows.
300 $a 157 p.
500 $a Source: Masters Abstracts International, Volume: 52-05.
500 $a Adviser: Richard Erdman.
502 $a Thesis (M.S.)--University of Maryland, College Park, 2013.
506 $a This item is not available from ProQuest Dissertations & Theses.
506 $a This item must not be sold to any third party vendors.
520 $a The objective was to determine the optimal dietary cation-anion difference (DCAD) required to maximize 3.5% fat-corrected milk (FCM) and feed efficiency (FE; FCM per dry matter intake (DMI)) in lactating dairy cows. When potassium carbonate was added resulting in four dietary treatments: 250, 300, 350, and 400 meq/kg DCAD, increasing DCAD linearly increased FCM and FE suggesting an optimal DCAD of at least 400 meq/kg. In a subsequent study comparing the relative effectiveness of potassium versus sodium, cation source had no effect on DMI or FCM. However, milk fat percentage and FE were highest when sodium was used as the sole cation source. Finally, surface response equations developed from literature data showed that DMI, FCM, milk fat %, rumen pH, and fiber digestibility increased linearly with DCAD. This suggested that improved FE was a function of improved rumen function, energy availability, and partitioning of absorbed energy toward milk energy.
590 $a School code: 0117.
650 4 $a Animal sciences. $3 3174829
690 $a 0475
710 2 $a University of Maryland, College Park. $b Animal Sciences. $3 1023474
773 0 $t Masters Abstracts International $g 52-05(E).
790 $a 0117
791 $a M.S.
792 $a 2013
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1552372